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Explaining Oil Issues, Check Engine Light Urgency, Turning Off Vehicle Appliances

Explaining Oil Issues, Check Engine Light Urgency, Turning Off Vehicle Appliances

WCCO's Car Care Jan 10, 2026 27 min
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About this episode

Nick Stoffel, an A.S.C. Certified Technician from Lloyd's Automotive, shares valuable insights on common car issues, including oil maintenance, check engine light concerns, and the importance of timely repairs. Listeners ask questions about differential fluid changes, the implications of using different oil viscosities, and the urgency of addressing fuel smells in vehicles. The discussion also touches on the benefits of regular maintenance and the impact of weather on vehicle performance. Nick emphasizes the importance of following manufacturer recommendations and staying proactive with car care.

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Technical Too Afraid to Ask
Car

Toyota RAV4

"...and it's for RAV4. I'm not sure how many years or which ones, but nonetheless, here's the deal."

The RAV4 is a small SUV made by Toyota, known for being practical and good for families or outdoor activities.

Part

wire harness protector

"...they will install a wire harness protector to seal the HV floor under wire connector."

A wire harness protector is a cover that keeps electrical wires safe from damage and helps them work correctly in a car.

Term

interference

"...that electric motor is putting off a frequency, and if that AM antenna is picking that up, it can create some little noise."

Interference is when something disrupts the sound or signals in a car, often caused by electrical parts like motors.

Term

AM antenna

"...if that AM antenna is picking that up, it can create some little noise."

An AM antenna is a part of the car that helps pick up AM radio signals, but it can sometimes get interference from other electrical parts in the car.

Term

differential fluid

"Yeah, thanks, guys. I've owned Hondas for the last 10, 12 years, and right around 20,000 miles, when I take it in for an oil change, they keep saying I should change the differential fluid. What is that about?"

Differential fluid helps keep a car's differential working smoothly. It's important to change it regularly because it can get dirty and affect how well the car drives, especially when turning.

Term

maintenance schedule

"I mean, you guys have all the information of various manufacturers that kind of tells you the maintenance schedule. It's not like you're trying to upsell people."

A maintenance schedule is like a checklist for taking care of your car. It tells you when to get things like oil changes or inspections done to keep your car running well.

Term

oil changes

"And here's the reasons why, you know, we talk about oil, you know, oil changes. A lot of times a manufacturer might say 10,000 miles."

An oil change is when you replace the old oil in your car's engine with new oil. This helps keep the engine running smoothly and prevents damage.

Term

engine

"...we see a lot more mechanical issues with engines..."

The engine is what makes the car go. It turns fuel into power to move the vehicle.

Term

viscosity

"...would it be okay if I added a different viscosity, not that much of a change from what's recommended..."

Viscosity is how thick or thin a liquid is. For example, thicker oils flow slower than thinner oils, which can affect how well they work in your car's engine.

Term

quart of oil

"If you're going in for, you have an appointment the following week and it's down a quart of oil, sure, top it up with, you know, not whatever you have, but something close, I think is just fine."

A quart is a way to measure liquid, like oil. Cars need a certain amount of oil to work well, and if there's not enough, it can cause problems.

Term

oil specifications

"There's a reason they make recommendations or they have certain specifications. We really want to try to follow the best we can."

Oil specifications are guidelines from the car maker about what kind of oil to use. Using the right oil helps the engine work better and last longer.

Term

emissions

"...it's a lot to do with fuel economy, emissions, and, you know, the technology is amazing."

Emissions are the harmful gases that come out of your car's exhaust. Lower emissions are better for the environment and help reduce air pollution.

Term

fuel economy

"...it's a lot to do with fuel economy, emissions, and, you know, the technology is amazing."

Fuel economy is how far your car can go on a certain amount of gas. Better fuel economy means you spend less money on fuel and help the environment.

Car

Chevrolet Silverado

"I've got a 00 Shub Silverado long box, OK, 2000 with a 4-3 V8. And yesterday I was driving over some bumps and I now have a gasoline smell coming in between the cab and the box on the pickup truck I can smell it."

The Chevrolet Silverado is a big truck that can carry a lot of stuff and is popular for work and personal use. The 2000 version has a strong engine that helps it drive well and tow things.

Term

evap lines

"...have something like to get up in the air, look underneath, kind of trace those evap lines, the fuel lines, the filler tube..."

Evap lines are tubes in your car that carry fuel vapors from the gas tank to the engine. They help prevent harmful gases from escaping into the air.

Term

fuel lines

"...kind of trace those evap lines, the fuel lines, the filler tube, figure out if there's a spot there or something to come damaged or loose..."

Fuel lines are tubes that carry fuel from the gas tank to the engine. If they leak, it can cause problems with how the car runs and can be dangerous.

Car

Ford Anglia

"Do I recently bought a Ford Anglia 1950?"

The Ford Anglia is a small car made by Ford, especially known in the UK. The 1950 version has a distinct look and was quite popular during its time.

Part

roller cam

"It's got a 383 stoker motor with a roller cam. So what is the advantage of a roller cam over just a regular cam?"

A roller cam is a type of camshaft that has small wheels (rollers) to help it move more smoothly. This helps the engine work better and can make more power.

Term

catalytic converter

"...because they consider the catalyst damaging misfire, so there's something significantly wrong and by driving it you can create permanent damage."

The catalytic converter is a part of your car that helps clean up the exhaust gases before they leave the car. If something goes wrong with the engine, it can hurt this part and lead to expensive repairs.

Term

E85

"So if you have a E85 vehicle or a flex fuel vehicle where you're allowed to use those higher ethanol levels, it's just fine."

E85 is a type of fuel that has a lot more ethanol in it than regular gas. Cars that can use E85 are called flex-fuel vehicles, and they can run on different mixes of gasoline and ethanol.

Term

octane level

"You look in your owner's manual, have a recommendation on the octane level. So you should follow those recommendations."

Octane level tells you how strong the gas is against knocking when it burns in the engine. Some cars need higher octane gas to run well.

Term

fluids

"...the linkage, the fluids, you know, whether it's something with the transmission or the drivetrain or the steering, you know."

Fluids in a car are liquids that help it run smoothly. They include oil for the engine, coolant to keep it from overheating, and transmission fluid to help change gears.

Term

drivetrain

"...whether it's something with the transmission or the drivetrain or the steering, you know."

The drivetrain is the part of the car that helps it move. It includes things like the transmission and driveshaft, which work together to get power from the engine to the wheels.

Term

exhaust

"...let the exhaust breathe a little bit. Let those tires warm up. Let those brakes clean up..."

The exhaust system helps get rid of gases produced by the engine. Letting it breathe means making sure those gases can flow out easily, which can help the engine run better.

Term

tires

"...Let those tires warm up. Let those brakes clean up..."

Tires are the rubber parts that touch the road. Warming them up helps them grip better, which is important for safe driving and handling.

Term

brakes

"...Let those tires warm up. Let those brakes clean up. So, you know, not saying you need to put yourself out..."

Brakes are what help your car slow down or stop. Keeping them clean and in good shape is important for safe driving.

Term

battery charging

"...As far as battery charging, I'm looking at a text that occasionally we get a question about this..."

Battery charging means putting energy back into the car's battery so it can start the engine and run electrical parts like lights and radio.

Term

brake rotor

"...there's a little corrosion built up on the brake rotor surface. Those brake pads are applying. That friction makes a little bit of noise. It cleans up, it's gone."

The brake rotor is a flat metal disc that helps your car stop when you press the brake pedal. Sometimes, if it gets rusty from wet weather, it can make a squeaking sound when you first use the brakes, but this is usually normal and goes away quickly.

Term

brake pads

"...Those brake pads are applying. That friction makes a little bit of noise. It cleans up, it's gone."

Brake pads are the parts that push against the metal discs (brake rotors) to help your car stop. If they are a bit rusty or dirty, they can make noise when you first use them, but this is usually nothing to worry about.

Term

all-wheel drive

"Good morning, Texter says, why don't automobile manufacturers make more all-wheel drive models in full-size pickup trucks rather than just four-wheel drive?"

All-wheel drive means that the car can send power to all four wheels at the same time. This helps the car grip the road better, especially when it's slippery or wet.

Car

Toyota Camry

"...e or two more. This listener says, I have a 2011 Camry. I need struts."

The Toyota Camry is a family-friendly car that is easy to drive and very dependable. Many people like it because it lasts a long time and doesn't usually have many problems.

Car

Chevrolet Corvette

"...g what the annual cost would be to maintain a ZR1 Corvette. Now, I know you, this comes from a friend of yo..."

The Chevrolet Corvette is a fast and sporty car that many people dream of owning. The ZR1 version is even more powerful, but it can be expensive to take care of because it has special parts and needs regular maintenance.

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