S3, E91 - All About Oil
The Truck Show Podcast
The Truck Show Podcast May 6, 2026
S3, E91 - All About Oil

S3, E91 - All About Oil

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0:00
64:35
S3, E91 - All About Oil
Concept

right to repair

Right to repair is about making it easier for independent mechanics and owners to fix cars without being locked out by the manufacturer. It’s a policy topic the host is advocating for.

Concept

automotive aftermarket

The automotive aftermarket is where you buy replacement parts or upgrades that aren’t made by the car maker. The host is talking about supporting that industry.

Company

Amsoil

Amsoil is a company that makes engine oil and other vehicle lubricants. This episode uses them as the expert source for choosing the right oil for your truck.

Term

oil viscosity

Oil viscosity is basically how thick the oil is. The right thickness helps the engine stay lubricated, especially when it’s cold or working hard.

Term

oil quality

Oil quality refers to how well an oil meets performance standards for lubrication, wear protection, and engine cleanliness. Higher-quality oils typically include better additive packages and meet relevant industry specifications.

Term

synthetics

Synthetic oil is a specially made type of engine oil. It’s designed to work better across a wider range of temperatures than regular oil.

Term

diesel

Diesel is a type of fuel commonly used in trucks. Because diesel engines run differently than gas engines, the oil requirements can also be different.

Term

electricity

Electricity refers to trucks powered by electric motors. Since they don’t use the same kind of engine oil as gas or diesel trucks, the oil discussion may be different.

Term

overhead

Here, “overhead” means the oil has extra protection margin. It’s like having some extra buffer so the engine is less likely to suffer when conditions are rough.

Term

lubricity

Lubricity is how well the oil prevents metal parts from rubbing directly against each other. Better lubricity usually means less friction and wear.

Term

winter weight

“Winter weight” is the part of the oil grade that tells you how it performs when it’s cold outside. It’s about how easily the oil flows during cold starts.

Term

W number

The “W” part tells you how the oil works in cold weather. The number before it is about how easily the oil can flow when the engine is just starting up.

Term

Mopar lifters

Mopar lifters are the valve-lifter parts used in some Chrysler/Dodge/Jeep engines. The hosts are saying these can make a tapping noise and then fail more seriously.

Term

Hemi Lifter Collapse

“Lifter collapse” is when the engine’s valve lifters don’t stay properly pressurized. If the oil isn’t the right thickness for the conditions, the lifters can work less effectively and cause problems.

Term

oil weight

Oil weight is the oil’s thickness rating. Using the correct weight helps the oil lubricate properly, especially when the engine is hot.

Term

40 weight

“40 weight” means a thicker oil grade. The idea is that a thicker oil can better protect parts when the engine is hot or under heavy use.

Term

020

“020” is shorthand for a very thin oil grade. The host is basically saying some engines used a thinner oil, and that choice can matter for how well the engine parts get lubricated.

Term

0W-20

0W-20 is a type of engine oil. It’s designed to flow easily when the engine is cold, and it stays thin enough when hot to help the engine run efficiently.

Term

additives

Additives are chemicals mixed into engine oil to make it protect the engine better. The hosts are saying that if you buy a good oil, it usually already has the additives you’d be trying to add later.

Term

phosphorus

Phosphorus is a chemical element that can be part of some engine-oil additives. The discussion here is that too much of it can end up creating deposits in the exhaust rather than solving the problem people think it will.

Term

lifter tick

“Lifter tick” is the tapping noise some engines make from the valve-lifter area. The hosts are saying certain additives might quiet it for a short time, but the noise can come back.

Concept

R&D (research and development) for engine-oil formulation

R&D means the company tests and engineers the oil so it works with the way modern engines are built. The point here is that newer engines may need oil that’s formulated specifically for their tighter tolerances.

Term

synthetic blend

Synthetic blend means the oil is part synthetic and part regular oil. The synthetic part might not be as much as the name suggests.

Term

base oil

Engine oil is mostly a base liquid, and then companies mix in extra chemicals to make it do specific jobs. The base oil is the foundation that affects how the oil behaves.

Term

crank position sensor

The crank position sensor tells the computer where the crankshaft is. If it detects something off, it can trigger a diagnostic code and affect how the engine runs.

Term

0W

The “0W” part tells you how the oil behaves in cold weather. Lower numbers mean the oil stays easier to pump when it’s very cold.

Term

J 300 standard

J 300 is a set of rules tests use to classify engine oil grades. If two oils share the same viscosity grade, they should meet the same basic requirements.

Term

cold crank number

This is a way to describe how hard it is for the starter to spin the engine when it’s very cold. Oils that resist flow less at low temps tend to crank more easily.

Term

kinematic viscosity

Kinematic viscosity is a lab measurement of how thick the oil is at a set temperature. In the oil grade, the higher the second number (like 40 vs 20), the thicker the oil tends to be when hot.

Term

film thickness

Film thickness is the protective layer of oil between metal parts. Thicker oil can help keep that layer in place, but it doesn’t always fix the real cause of a problem.

Term

0W-40

Engine oils have grades like 0W-40. “0W” means it stays fluid enough for cold starts, and “40” means it’s still thick enough to protect the engine when things get hot.

Term

thicker oil film

Oil forms a protective layer between engine parts. A “thicker oil film” means that layer is more substantial, which can help protect against wear.

Term

viscosity index improvers

These are additives mixed into oil so it doesn’t get too thin when hot or too thick when cold. That helps the oil keep doing its job across temperature swings.

Term

viscosity modifiers

Viscosity modifiers are additives that help oil stay the right thickness. They use polymers that change shape with temperature so the oil behaves more consistently.

Chevrolet Silverado
Car

Chevrolet Silverado

The Chevrolet Silverado is a large pickup truck. People use it for things like towing trailers and hauling loads. The podcast mentions a 2021 Silverado 1500 because it’s being used for towing.

Term

20-weight

“20-weight” is a shorthand for a thinner oil grade. Thinner oil can help fuel economy, but thicker oil can sometimes be better for heavy towing or an older engine.

Term

5W-30

5W-30 is a thicker oil than 0W-20. Some people switch to it when towing more often or when they think their engine may be wearing more.

Term

quarts of oil

Quarts of oil is just how much engine oil you put in. Too much oil can make the engine work harder, get hotter, and not perform as well.

Term

dyno

A dyno is a machine that tests a car’s engine on a stand. It lets you see how changes—like oil amount—affect things like heat, pressure, and power.

Term

towing and hauling

Towing and hauling means pulling or carrying heavy loads. That makes the engine work harder and get hotter, so the oil has to handle more heat.

Term

oil grade

Oil grade tells you how thick the oil is, especially when it’s cold versus hot. Changing grades can change how the engine feels and how much fuel it uses.

Term

engine operating temperature

Engine operating temperature is how hot the engine typically runs. Newer trucks often run hotter than older ones, and that affects what kind of oil you should use.

Term

breakdown point

The breakdown point is when oil gets too hot and starts to stop protecting the engine as well. Synthetic oil is designed to last longer before that happens.

Term

synthetic oil

Synthetic oil is a type of engine oil designed to handle heat better. If your truck runs hotter than older ones, synthetic is often the safer choice because it holds up under load.

Term

conventional oil

Conventional oil is the standard type of engine oil. The claim here is that it doesn’t handle extreme heat as well as synthetic, especially when towing.

Term

Arrhenius rule

The Arrhenius rule is a chemistry idea that says heat makes reactions happen faster. For engine oil, more heat means the oil breaks down faster, so oxidation speeds up a lot as temperature goes up.

Term

engine oil oxidation

Engine oil oxidation is when the oil slowly breaks down because of heat and oxygen. The hotter the engine runs, the faster that breakdown happens.

Term

oxidation rate

Oxidation rate is how fast the oil “ages” due to reacting with oxygen. When it happens faster, the oil doesn’t protect the engine as well for as long.

Term

thermostat

A thermostat helps control how hot the engine runs by deciding when coolant should circulate to cool the engine. If the thermostat runs hotter or cooler, the oil temperature changes too.

Gmc Sierra
Car

Gmc Sierra

The GMC Sierra EV is a pickup truck that runs on electricity instead of gasoline. Even though it’s electric, it still has systems that control temperature so it can work properly. The podcast mentions Sierra-related temperature/engine talk, which connects to how vehicles stay within safe operating ranges.

Term

shear stable

Shear stability means the oil can “hold its thickness” even when it’s being squeezed and stressed inside the engine. If it can’t, it can get thinner and protect less effectively.

Term

ad pack

An ad pack is the mix of chemicals added to oil to help it protect the engine. Different additive mixes can make oil last longer, especially when it gets very hot.

Term

light ends

Light ends are the more easily evaporated parts of the oil. When they boil off at high heat, the oil’s properties can change and it may not protect as well.

Term

additive package

Oil isn’t just “oil.” Manufacturers add special chemicals to it, and those additives help the oil protect the engine and stay effective longer.

Term

change intervals

Oil change intervals are how often you’re supposed to change the oil. If you wait too long, the oil can lose its ability to protect the engine.

Term

hydraulic lifter

A hydraulic lifter is an engine part that uses pressurized oil to keep the valve timing/clearance correct automatically. If the oil can’t flow cleanly, it can make the lifter act up and cause ticking.

Term

oil passage

An oil passage is a built-in “oil hallway” inside the engine. If something blocks it, the engine parts don’t get proper lubrication and can wear out faster.

Term

camshaft

The camshaft is the engine part that controls when the valves open and close. If lubrication is bad, the cam and related parts can wear out faster.

Term

oil filter

The oil filter is like a screen for your engine oil. It traps dirt and metal bits so the oil can keep protecting the engine.

Term

oxidize your oil

Oxidizing oil means it chemically breaks down from heat and dirty gases. When that happens, the oil can turn into deposits and protect the engine less effectively.

Term

blow-by

Blow-by is combustion gases leaking past the piston rings into the crankcase. It can contaminate and oxidize the oil, reducing its ability to protect engine components.

Brand

Pennistar

Pennistar is an oil brand mentioned by the host. They said it seemed to drain away after sitting, leading to a rattly startup.

Brand

signature series

“Signature Series” is the oil line the host switched to. They say it helps oil stay on the engine parts after the truck sits, so startup is quieter.

Term

stiction

Stiction is when parts that should move freely don’t move right away after the engine has been parked. Better oil can leave a protective film so the engine starts quieter.

Term

valve train

The valve train is the mechanism that controls when the engine’s valves open and close. It needs oil so it doesn’t run dry after the truck has been parked.

Brand

fleece

Fleece is a diesel-performance brand the hosts mention as a partner for engine oil. They wanted an oil product made to match their diesel applications.

Term

viscosities

Viscosity is how thick the oil is. Thicker oils protect better when hot, while thinner oils flow better when it’s cold.

Term

break-in oil

Break-in oil is used right after an engine is rebuilt or new. It helps the engine “settle in” during the first hours/days of operation.

Term

turbo truck applications

A turbo truck is a truck engine with a turbocharger. Turbo engines run harder, so the oil has to protect and stay cleaner under that extra stress.

Term

turbo cleanliness

Turbo cleanliness means keeping the turbo from getting dirty with deposits. Cleaner turbo parts can help it keep working the way it should.

Term

extended services

Extended services means the truck is expected to go longer between maintenance intervals. The episode is linking that to how diesel oil products are designed.

Concept

light duty vs heavy duty trucks

Light-duty and heavy-duty trucks are different categories of trucks. The hosts are saying diesel changed a lot recently, partly because rules and technology differ by truck class.

Term

fuel injection system

The fuel injection system is how the engine sprays fuel in the right way. If it breaks, the truck can run badly and repairs can get serious.

Term

after treatment

After treatment is the system on a diesel that cleans up exhaust after it’s burned. If it has problems, the truck can get expensive to fix.

Term

low sulfur fuels

Low sulfur fuel is diesel with less sulfur in it. It’s used to reduce pollution, and it can change how some engine parts behave.

Term

warranty issues

Warranty issues are expensive repairs the company has to pay for when something breaks under the warranty. The hosts are saying diesel problems led to lots of those costs.

Concept

EV and hybrid

EV and hybrid are ways of powering cars that rely more on electricity than diesel. The point here is that manufacturers shifted strategies to meet rules and reduce diesel-related problems.

Term

CAFE standards

CAFE standards are government rules that push car companies to improve how efficiently their whole lineup uses fuel. The hosts are saying diesel was part of that equation.

power stroke
Car

power stroke

Power Stroke is Ford’s diesel engine family. The hosts are saying it’s one of the top performers for power in today’s heavy-duty diesel trucks.

Term

PC-12

PC-12 is a future set of rules/specs for diesel oil. When the rules change, oil makers have to reformulate the oil to meet the new requirements.

Term

particulate matter

Particulate matter is basically soot and tiny particles that come out of the exhaust. Diesel regulations often target reducing these particles.

Term

detergent dispersants

Detergent dispersants are additives that help keep soot and other contaminants suspended and prevent deposits from forming on engine surfaces. In diesel oils, they’re especially important because combustion can produce more particulate contamination.

Term

extended drain interval

This means how long you can go between oil changes. Longer drain intervals require the oil to stay effective for more time.

Term

OE line

“OE” means the oil is made to match what the car maker recommends. It’s meant to be a direct replacement that fits the rules in the owner’s manual.

Term

original equipment replacement synthetic

This means a synthetic oil made to meet the same kind of requirements as the oil your car maker calls for. It’s designed to work as a replacement without you needing to change your approach.

Term

warranty sensitive

“Warranty sensitive” means you’re trying to avoid anything that could cause problems with your car’s warranty. With oil, that usually means using the type/spec the manual calls for.

Term

fully licensed product

“Fully licensed” means the oil has been approved to meet the required standards. It’s a way of saying it’s not just a random oil—it’s been validated for the intended specs.

Term

spec missing

“Spec missing” means the oil doesn’t fully meet the requirements your car needs. The host is saying their oils don’t leave out any required checklist items.

Term

owner's manual

The owner’s manual is the car maker’s instructions for maintenance. It tells you what kind of oil and specs to use.

Term

oil life monitor

An oil life monitor is the dashboard system that estimates when your oil needs to be changed. It looks at how you drive and how hard the engine is working, not just the odometer.

Term

full synthetic

Full synthetic refers to engine oil formulated from synthetic base stocks rather than conventional petroleum oil. Synthetic oils generally handle heat and oxidation better, which can support longer drain intervals when the oil meets the right vehicle specs.

Term

Dexos 1 Gen 3

Dexos 1 Gen 3 is a GM-approved oil standard. If an oil is Dexos 1 Gen 3, it means it meets GM’s testing and requirements for certain GM engines.

Term

API

API is an industry standard for engine oil performance. The point they’re making is that real certification usually involves testing and licensing, not just a label claim.

Term

SAE rating

SAE is a set of automotive standards that can show what an oil is designed to do and how it’s classified. They’re saying the important part is whether the oil truly meets the standard, not just what it says on the label.

Brand

SIG series

“SIG series” is the name of a premium oil line being discussed. The host says it’s designed to last longer and be built specifically for what engines need.

Brand

OEXL

“OEXL” is another oil tier mentioned in the lineup. The host groups it with the top product line, implying it’s meant for serious, high-performance use.

Term

oil analysis program

An oil analysis program tests your used oil to see how well it’s been protecting the engine. It can show whether the oil is still in good shape or if something is going wrong.

Term

top end

The top end is the upper part of the engine, where the valves and related parts are. It’s often where problems show up as engines age.

Term

oil sample

An oil sample is a small amount of used oil you collect to send for testing. How you take it can change how useful the results are.

Term

high mileage oil

High mileage oil is made for older, higher-mileage engines. It’s designed to help reduce sludge and can help seals that have started to leak over time.

Term

carbon buildup

Carbon buildup is extra gunk that forms from burning fuel and oil. It can hurt how clean and efficient the engine runs.

Term

sludge

Sludge is gunk that can build up inside an engine when oil ages. It can make it harder for the engine to stay properly lubricated.

Term

detergency

Detergency is how well the oil helps prevent gunk from building up. More detergency means the oil is better at keeping the engine cleaner.

Term

conditioners

Conditioners are additives that help older engine seals stay flexible. That can reduce oil leaks that show up as seals age.

Byd Seal
Car

Byd Seal

The BYD Seal is an electric car. In this podcast clip, it’s mentioned while the host talks about a product that’s supposed to clean and help protect engines. The focus there is on what the product does, not on how the car drives.

Term

fuel dilution

Fuel dilution means some gasoline gets into the engine oil instead of burning in the engine. That can make the oil less effective at lubricating the engine, especially with lots of short trips.

Term

corrosion inhibitors

Corrosion inhibitors are chemicals added to oil to help prevent rust inside the engine. They matter more when the engine stays cooler than normal.

Term

moisture (condensation)

Moisture can collect inside the engine when it doesn’t get fully warmed up. In hybrids, the engine may run less often, so water can build up more.

Term

plug-in hybrid

A plug-in hybrid can drive using electricity for a while, especially on short trips. If you rarely use the engine, it may not warm up fully, which can cause oil to get contaminated.

Term

OE

OE means the oil that matches what the vehicle was originally designed to use. The point is that if you start with the right spec, you can keep using it as mileage builds.

Concept

reformulation

Reformulation means the company changed the recipe for the oil. The goal is usually to make it work better or last longer in real driving.

Brand

six series

“Six series” is a specific line of motor oil. They’re saying the formula was updated (reformulated) and they’re excited about the improvements.

2010 Silverado 2500 HD
Car

2010 Silverado 2500 HD

This is a heavy-duty Chevrolet pickup (the 2010 Silverado 2500 HD). The hosts are talking about a specific interior detail—an offset steering wheel—on that truck.

Term

offset steering wheel

An offset steering wheel means the wheel isn’t centered when you’re driving straight. That can happen if the car’s alignment or steering setup isn’t quite right.

Part

shift fork

A shift fork is a part inside the transmission that helps move the gears into the right position. If it breaks, the truck may have trouble shifting or may not be able to drive normally.

18 F-150
Car

18 F-150

The Ford F-150 is a popular full-size pickup truck. Here, the speaker says they bought a 2018 F-150 with 66,000 miles.

Hummer H3
Car

Hummer H3

The Hummer H3 is a rugged, truck-based SUV. In this segment, they mention it because a shift fork broke and was replaced.

Brand

Bilsteins

Bilstein makes suspension parts, especially shocks/struts. The speaker says they installed new Bilstein shocks on their older truck and it drives better.

Term

tongue weight

Tongue weight is how much weight the trailer pushes down on the hitch. Getting it right helps the trailer tow safely and keeps the truck from feeling overloaded or unstable.

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