Fuel economy concerns take center stage as callers seek advice on improving mileage and understanding vehicle performance. A Ram 2500 owner learns that his 10-13 mpg is typical for a heavy-duty truck, with driving speed and conditions playing major roles. Another caller with a 2016 Equinox is reassured that regular maintenance like spark plug replacement and fuel system cleaning can help maintain efficiency. The hosts also debunk myths about fuel additives and chips, emphasizing realistic expectations and practical driving habits. The episode blends technical insights with relatable stories, making fuel economy a down-to-earth topic.
This is Under The Hood. The Automotive question and answer show that is done live each week taking yourt calls and giving answers right over the air. If you have an Auto Repair problem that is giving you fits, give us a call today. 866-594-4150 We have the fix for what ails you. How do I get better mileage from My 24 Ram truck? Is my Chevy Equinox mileage ok? What things need to be done to it? How to check for a weak cylinder code p0284 on my 15 F250 Diesel? Are my wheel bearings bad on my Nissan Frontier? ABS codes on my Frontier My 06 Ford E350 is hard to fill with fuel how do I fix it? Stellantis loses cash of 26.3 billion dollars on electric cars What oil to use in my Ram with a new engine 2011? Recycling used fuel
"I've got a 2024 Ram 2500. And to get a terrible gas mileage on it. I just purchased this. So it came off of a lease."
The Ram 2500 is a big pickup truck that can carry and pull heavy loads. The 2024 version is the newest one with updated technology and engines.
The Ram 2500 is a heavy-duty pickup truck known for its towing and hauling capabilities. The 2024 model is part of Ram's latest generation of trucks offering powerful engine options and modern features.
"...per gallon in a truck because of the RPM and the wind, the faster you go, imagine holding up a piece o..."
The Renault Wind is a small car with a roof that can open, making it fun to drive. People talk about how wind can affect how much gas it uses when driving fast.
The Renault Wind is a small two-seater convertible known for its unique design and fun driving experience. It is often mentioned in discussions about fuel efficiency and the impact of wind resistance at higher speeds.
"...re they get up to 16. So I thought 10.9. I have a Silverado 1500 that if you look online says you're going t..."
The Chevrolet Silverado is a big truck that many people use to carry heavy things or drive on rough roads. People talk about it because it can pull heavy loads and is good for many jobs.
The Chevrolet Silverado is a full-size pickup truck known for its strong towing capacity and versatility. It's a popular choice among truck buyers for both work and personal use, often discussed in terms of fuel economy and performance.
"Do you have any recommendations on these plug-in chips I'll call them, which claim to give you better gas mileage, better horsepower? It's going to be super minor. It'll give you a little more horsepower and torque, but not miles per gallon because you're going to trade off that half to one mile per gallon again."
Plug-in chips are small gadgets you can add to your car to try to make it faster or use less gas. But usually, they only help a little bit and might need you to use more expensive fuel.
Plug-in chips are aftermarket electronic devices that modify a vehicle's engine control unit (ECU) settings to potentially increase horsepower and torque, and sometimes improve fuel efficiency. However, the actual gains are often minor and can come with trade-offs such as requiring premium fuel.
"I'm guessing. It's probably time at some point to put spark plugs in there. That was the thing I thought it was spark plugs."
Spark plugs help your car's engine start and run by making tiny sparks. Over time, they wear out and need to be changed so your car runs smoothly.
Spark plugs are components that ignite the air-fuel mixture in an internal combustion engine to start the combustion process. They need periodic replacement to maintain engine performance and efficiency.
"At that time, they might recommend some new spark plug wires to go on there and possibly the coils."
Spark plug wires send electricity to the spark plugs so they can make sparks. If the wires get old, your car might run badly and need new ones.
Spark plug wires carry electrical current from the ignition coils to the spark plugs. Over time, they can degrade and cause misfires or poor engine performance.
"No reason to spend that money. Fuel system cleaning. Yeah. They might recommend a fuel system cleaning and spark plugs."
Fuel system cleaning is a process that cleans parts of your car that use gas to help it run better and save fuel.
Fuel system cleaning involves removing deposits from fuel injectors, intake valves, and combustion chambers to improve engine performance and fuel efficiency.
"...ton of E15 in use on a regular basis when it says E88 on the pumps. And so Russ and I have both had ve..."
The BMW 1 Series is a small, fancy car that is fun to drive. Some people use a type of gas with more alcohol in it, which can be tricky for the car.
The BMW 1 Series is a compact luxury hatchback or sedan that offers sporty performance and premium features. Fuel type discussions arise because some owners use higher ethanol blends than recommended.
"...Russ and I have both had vehicles that we've used E30 in on a regular basis. But they require premium ..."
The BMW 3 Series is a fancy car that is fun to drive and has nice features inside. It usually needs special, more expensive gas to run well.
The BMW 3 Series is a compact luxury sedan renowned for its sporty handling and premium features. It often requires premium fuel, which is a point of discussion among owners regarding maintenance and running costs.
Term
E85
"Do not use the E85. Right. Do not use the E85 unless it's a flex fuel and it has a yellow gas cap or has some indication by the VIN number. It's a flex fuel."
E85 is a special kind of gas that has a lot of alcohol in it. Only certain cars made for it can use it safely.
E85 is a type of fuel blend consisting of 85% ethanol and 15% gasoline, commonly used in flex-fuel vehicles designed to handle higher ethanol content.
"Do not use the E85 unless it's a flex fuel and it has a yellow gas cap or has some indication by the VIN number. It's a flex fuel."
Flex fuel cars can use regular gas or special gas with more alcohol in it. They are made to work with both.
Flex fuel refers to vehicles that can run on gasoline or higher ethanol blends like E85. These vehicles have components designed to handle the corrosive nature of ethanol.
"Hey guys, I got a 2015 Ford F-250 and it's the 6.7 power stroke."
The Ford F-250 is a big truck used for heavy jobs. The 2015 version can have a strong diesel engine called the 6.7 Power Stroke that helps it pull heavy loads.
The Ford F-250 is a heavy-duty pickup truck known for its towing and hauling capabilities. The 2015 model can be equipped with the 6.7-liter Power Stroke diesel engine, which is popular for its power and durability.
"Hey guys, I got a 2015 Ford F-250 and it's the 6.7 power stroke."
The 6.7 Power Stroke is a strong diesel engine that helps big trucks like the Ford F-250 pull heavy things. It uses special parts to make a lot of power and run efficiently.
The 6.7 Power Stroke is a 6.7-liter turbocharged diesel V8 engine produced by Ford, known for its high torque output and use in heavy-duty trucks like the F-250. It uses advanced technology like a variable geometry turbocharger and high-pressure common rail fuel injection.
"So I was wondering, is there any way to check that cylinder for compression on there? There is. You can pull the glow plug out and use a tester that goes in that hole in order to test the compression. You need a special adapter with the compression gauge and the compression gauge is capable of going to the PSI that it's supposed to have. But you can check compression that way we do that."
A compression test checks how strong the engine's cylinders are by measuring the pressure inside them. This helps find out if parts inside the engine are worn out or broken.
A compression test measures the pressure inside an engine's cylinder during the compression stroke. It helps diagnose engine health and identify issues like worn piston rings, valves, or head gaskets.
"There is. You can pull the glow plug out and use a tester that goes in that hole in order to test the compression."
Glow plugs help diesel engines start when it's cold by warming up the engine. You can take them out to check how strong the engine's cylinders are.
Glow plugs are heating elements used in diesel engines to warm the combustion chamber for easier starting in cold conditions. They can be removed to perform a compression test in diesel engines.
"But you can check compression that way we do that. We do it on our salvage units that we dismantle."
Salvage units are cars or trucks that got damaged and are taken apart to use their parts. Checking the engine's strength helps decide if parts are still good to use.
Salvage units are vehicles that have been damaged or written off but are dismantled for parts or repair. Testing compression on these units helps determine engine condition before reuse or resale.
"Because of the low sulfur content, you're going to wear parts out. Our partner at Hot Shot Secret sells an everyday diesel treat, the EDT,"
Diesel fuel with less sulfur is better for the environment but can make engine parts wear out faster unless you add special liquids to protect them.
Low sulfur diesel fuel has reduced sulfur content to lower emissions, but it also reduces natural lubricity, which can cause increased wear on engine parts without additives.
"Our partner at Hot Shot Secret sells an everyday diesel treat, the EDT, that's good to run in there. It'll provide the lubricity and also help cleaning it out."
EDT is a liquid you add to diesel fuel to help keep the engine parts clean and stop them from wearing out.
EDT stands for Everyday Diesel Treat, a fuel additive that provides lubricity and cleaning properties to diesel fuel systems, helping to protect injectors and other components.
"You might perform an emission system cleaning on it to see if that cleans it up. One of the first steps that shops will do if they're trying to diagnose this type of thing is a cleaning."
Emission system cleaning is like giving your car's exhaust parts a good wash to help it run cleaner and pollute less. It can fix problems caused by dirty parts.
Emission system cleaning is a maintenance process that removes deposits and contaminants from components involved in controlling a vehicle's exhaust emissions, such as fuel injectors and catalytic converters. This helps improve engine performance and reduce harmful emissions.
"Because let's say it needs an injector. They're going to clean all the injectors and then they're going to put a new one in that cylinder because they want the others to be just as clean as a new one."
An injector is a small part that squirts gas into the engine so it can run. If it gets dirty, the car might not work well.
A fuel injector is a component that sprays fuel into the engine's combustion chamber in a precise and controlled manner. Keeping injectors clean is important for efficient engine operation and fuel economy.
"you say you put the hot shots in there and you got yourself where the light went away. That's highly encouraging. ... So I did and like I said, within 30 miles, the light went off ... when it took that light away, I'm like, okay, obviously there's something to it."
Hot Shot's Secret makes special liquids you add to your car's fuel to help it run better and stop warning lights. People use it to fix problems without going to a mechanic.
Hot Shot's Secret is a company that produces fuel additives and lubricants designed to improve engine performance and reduce emissions. Their products are often used to address issues like check engine lights caused by fuel system or emissions problems.
"New OEM wheels can be expensive with some wheels that cost 500 or more from the dealer."
OEM wheels are the wheels that come with your car when it's new. They usually fit perfectly but can cost more than other wheels you can buy.
OEM wheels are original equipment manufacturer wheels, meaning they are the wheels that came with the car from the factory. They are often more expensive than aftermarket options but guarantee fitment and quality.
"Use your factory TPMS sensors and caps too. Go to roadreadywheels.com to find out more."
TPMS sensors are little devices in your tires that tell you if your tires don't have enough air. This helps keep you safe while driving.
TPMS stands for Tire Pressure Monitoring System. These sensors monitor the air pressure inside your tires and alert you if the pressure is too low, helping maintain safety and tire longevity.
"If you need parts, whether it be for a brand new car or going back about 20 years, it doesn't matter, check out car-part.com. It's fast and it's easy. Over 200 million parts strong all across North America. Over 4,000 recyclers to choose from, giving you the largest selection available."
Car-part.com is a website where you can find used car parts from many different sellers. It helps you get parts for your car, even if it's an older one.
Car-part.com is an online marketplace that aggregates used auto parts from thousands of recyclers across North America. It helps buyers find parts for a wide range of vehicles, including older models, often at lower prices than new parts.
"... y'all show man. I got a 2007 B64.0 little Nissan Frontier. I got a couple of questions on it. Oh, the firs..."
The Nissan Frontier is a smaller truck that is good for everyday work and doesn't cost too much. Older ones might need some extra care to keep running well.
The Nissan Frontier is a midsize pickup truck known for its reliability and affordability. Older models like the 2007 version are popular among budget-conscious buyers but may require attention to common age-related issues.
""Oh yeah, I'm having issues with the idle a little bit and an ABS light, I can't get to this fear. The ABS light didn't change any with the wheel hubs because sometimes that can be a problem because there's sensors up there.""
The ABS light is a warning on your car's dashboard that tells you if the anti-lock brakes might not be working properly. Anti-lock brakes help keep your car from sliding when you brake hard.
The ABS light on a vehicle's dashboard indicates a problem with the Anti-lock Braking System, which helps prevent wheel lockup during braking for better control.
""The ABS light didn't change any with the wheel hubs because sometimes that can be a problem because there's sensors up there.""
Wheel hubs are the parts in the middle of your wheels that hold them onto the car. They also have sensors that help the car know how fast each wheel is turning.
Wheel hubs are the central part of a car's wheel assembly where the wheel is mounted. They often contain sensors for systems like ABS to monitor wheel speed.
""because there's sensors up there. I thought it would, but it didn't. Have you put a scan on it to see where that ABS light is, you know, what's, where it's coming from that you can get a little more detail with the right scanner?""
ABS sensors are small parts that check how fast your wheels are spinning. They help the car stop safely without the wheels locking up.
ABS sensors detect the rotational speed of each wheel and send this data to the ABS control unit to prevent wheel lock during braking.
"Well, I just, I said breaking news, but as we record live at the break, I looked over my phone and I had a notification from LinkedIn. And now we've seen the third of the big, what we would call the big three report their EV write-offs."
When a car company spends money on electric cars but things don't go well, they have to count that money as lost. That's called an EV write-off.
EV write-offs refer to the financial losses companies record when their investments in electric vehicle programs fail or underperform, leading to asset devaluation or project cancellations.
"Stellantis posts its first annual loss ever on EV charges. Let's get ready for this one. Okay. So, Stellantis on Thursday delivered its first ever yearly loss..."
Stellantis is a big car company that owns brands like Jeep and Dodge. They make many different cars and trucks.
Stellantis is a multinational automotive manufacturing corporation formed in 2021 from the merger of Fiat Chrysler Automobiles and PSA Group. It owns several well-known brands including Jeep, Dodge, and Chrysler.
"The auto giant in charge of Jeep, Dodge and Chrysler reported a net loss of $26.3 billion in 2025 after posting a profit of roughly $6 billion a year earlier. Most of those write-downs traced to its failed EV program..."
Electric vehicles are cars that run on electricity instead of gas. They use big batteries to move.
Electric vehicles (EVs) are cars or trucks powered entirely or primarily by electric motors using energy stored in batteries instead of traditional internal combustion engines.
"...tis sees hybrids including the best-selling Jeep Wrangler 4XE as a path forward and I see they're even elim..."
The Jeep Wrangler is a tough car that can drive on rough paths and is good for outdoor adventures. There's a new version that uses both gas and electricity to save fuel.
The Jeep Wrangler is an iconic off-road SUV known for its rugged design and strong off-road capabilities. The Wrangler 4XE hybrid version represents Jeep's move toward electrification while maintaining its adventurous spirit.
"... we're, and they started doing some electric. The lightning was developed, all that. And now in the meantime..."
The Ford F-150 Lightning is a big truck that runs on electricity instead of gas. It can do the same jobs as regular trucks but is better for the environment.
The Ford F-150 Lightning is an all-electric version of America's best-selling pickup truck, combining traditional truck capabilities with modern electric technology. It represents a significant step toward electrification in the pickup segment.
"...e things might go hand in hand. We're dismantling Chevrolet bolts, a number of those for parts. And the batteries ..."
The Chevrolet Bolt is a small car that runs only on electricity, so it doesn't use gas. People talk about its battery because it needs to be taken care of to keep the car working.
The Chevrolet Bolt is a compact electric vehicle praised for its range and affordability in the EV market. Discussions often focus on battery health and replacement parts due to its electric nature.
"And the hybrids, they gained knowledge on the hybrid battery technology."
Hybrid cars use both gas and electric batteries to help save fuel. The battery technology helps the car go farther and use less gas.
Hybrid battery technology refers to the batteries used in hybrid vehicles, which combine an internal combustion engine with an electric motor to improve fuel efficiency and reduce emissions. Advances in this technology have improved vehicle range and performance.
"...we've upgraded the fleet slightly from the Toyota T100s. As soon as you start looking it is amazing how ..."
The Toyota T100 is an older big truck that many people liked because it was simple and worked well. Some people replace it with newer trucks that have more modern features.
The Toyota T100 is a full-size pickup truck produced in the late 1990s, known for its reliability and simplicity. It is often compared to newer trucks when upgrading a fleet due to its older technology and design.
Select text to request an explanation
Welcome to the Under the Hood Show podcast. Thank you for joining us. We have some podcast sponsors.
Berkeley won classics. Your key to collector car insurance.
And road ready wheels. Replica OEM wheels add huge savings. Use the offer code hoody for even more.
And by car dash part over 200 million used parts ready to ship to you fast.
Thank you for subscribing. Wherever you listen to your podcast, we would love if you'd subscribe
and rate and review us. We appreciate it. Here is the Under the Hood Show podcast.
This is Under the Hood. Welcome to the Under the Hood Show.
We are glad to have you with us. Russ Evans is here to answer your automotive questions.
Thanks for joining us under the hood. Shannon Nordstrom is here to do the same.
Welcome, hoodies. Thanks for tuning in so we can help you tune up. I'm Chris Carter here to answer
your calls at 866-594-4150. 866-594-4150. Let's talk to Dave. We're going to go to calls right
away. We got one. He's been waiting for a while. So let's get to Dave. Dave, what can we do for you?
I've got a 2024 Ram 2500. And to get a terrible gas mileage on it. I just purchased this. So it
came off of a lease. And the average on the last, well, about 1200 miles I put onto it,
since I purchased it. I'm at 10.9 for that 1200 miles. And I tried different gases
last time. It's in a premium gas. And to help it out right now, it's running on probably about
100 miles on that gas thing and about 12.9 on it. And so where do you drive it? I guess,
anything that you can. Yeah, where do you drive it and how do you drive it? It's a mixture. I haven't
hauled anything with it yet. I live in the country. So, you know, go to the city. It's about 15 miles.
And then I get there and then I'll, you know, drive it in town on a bus. Fill it up.
Engine size? Which one's in it? 6.4 probably. 6.4 gas. It's a 6.4, yes.
There's other ramo. There's other 2,500 right now going, how could I get that much?
Gotta ask this question. Where do you live? Just a state?
I think, let me go to flatlander. So you're in cold country. So you're not going to want to hear
this, but sounds like you're getting great gas mileage for this truck. Because I have the same,
when this truck comes into my shop for oil changes and I hop in and I go for a test drive,
like after we rotated tires to re-torque them, I look down and because I'm always curious,
what's average miles per gallon? And I'm seeing them anywhere from 8.8 to 11.5. That's, that's
what they're at. And they just been cruising. They haven't been resetting it. But in the summer
months, I'll see them anywhere from 12.9 to 13 is they're 13 to right in that range. So it'll go
up a little, little more when it's warmer, but it's a truck that's geared for pulling. The good
thing about this truck is you won't see usually a whole lot of change. If you're pulling what it's
rated for, you know, and if you really pulling it loaded and driving hard, you're going to see it.
Another thing that'll drastically change fuel economy on this truck is the speed you drive it.
If you, so where you're at, I'm familiar with that country. If you get on that highway and you
hit that 80 mile an hour speed limit and you're, you say, got the crew set and you drive that,
what is it, 30, 25, 30 miles, something like that to get in. Yeah, 15, actually. Okay. 15 miles at
80 miles an hour versus try, if you've got the time just for two tanks of gas, take the back,
take the back road where you can drive 55 with it and see how much you change. I bet it increases
by three miles per gallon. There is a giant cutoff between 1680. Yeah, if you have the time,
that'll do it, but it's real and what it takes. I know I can either take a road that'll take me
55 most of the way, all the way to work, or I can take the interstate where it's a combination
of 80 and 65 and then a state highway 65. And it's for me, it's almost three miles per gallon
in a truck because of the RPM and the wind, the faster you go, imagine holding up a
piece of plywood and you just stand in there, no wind, not too hard, but the faster you try to go
with it, the more wind you push and the harder it is. So it's exponential, the faster you go,
the more you're going to decrease because you've got more of a load. And the tuning in the engines
usually got a tipping point somewhere there at 65. So it just pours it in. The truck
has got how many miles on it now you said? About 21,000. What did you expect? I'm just
kind of curious what your expectation was. 16,000. I look online and there's
just out there where they get up to 16. So I thought 10.9. I have a Silverado 1500 that
if you look online says you're going to be in the 14 to 18 and mine's always down around 11.
It's just the way I drive, where I drive. On a long trip on the highway in my 21,
I'm about 14 is average. And if I'm driving slower for a really long way of state highways,
it grew up to 17, 18, but most of the time it's lower. They want to publish those numbers.
See something that's not quite right? Our annotations are AI-generated and can sometimes miss the mark.
Click the flag icon on any annotation to suggest a correction.