camaro / corvette v8 oil vs Sierra / silverado

[Big_Kahuna]

to the best of my knowledge the engine is the same in the Camaro/ corvette with our trucks, but why are the Camaros required to use 5w30 or 0w40 oil but our trucks says use 0w20? 

 I am assuming for the EPA  gas milage ? the 0w20 oil is just to darn thin, its like a water, I can not see how this is good for our big v8 engines...

[CamGTP]

Different uses, the camaro/corvettes make more horsepower, have different performance based parts and rev higher. Oil temps come into play and the 0W40 is better suited for that.

The 0W20 is just fine for the truck engines, that oil meets all the requirements for the engine while never being a problem for engine bearings, lifters, seals etc etc.

 

Lots of people switch oil weights but if you ask me they are gaining nothing by doing so. They just are just doing what makes them feel better.

[Amcguy1970]

12 hours ago, Big_Kahuna said:

to the best of my knowledge the engine is the same in the Camaro/ corvette with our trucks, but why are the Camaros required to use 5w30 or 0w40 oil but our trucks says use 0w20? 

 I am assuming for the EPA  gas milage ? the 0w20 oil is just to darn thin, its like a water, I can not see how this is good for our big v8 engines...

 

You might want to let the engineers that designed and tortured tested these engines what you found and they have missed...

 

Tyler

[RyanbabZ71]

Camaro also uses 10 qts of oil to the 8 in the silverado

 

Id rather my truck not run 0W-40 its expensive luckily I have 24 qts currently on my shelf

[Rad64]

I'm gonna go with AMCGuy here...the engineers do it for a reason. My guess is that these engines are both more efficient and also much tighter than the old stuff most are used to. Tight tolerances need oil, especially when they are cold and 20W50 ain't gettin in those tiny spaces.

[Z45]

For those the worship at the GM alter, here is their answer.

 

Truck/SUV V-8s are engineered to use 0W-20 oil to improve lubrication and reduce friction.

 

Quote

Question: Will using a different viscosity oil other than what is recommended damage the engine?

Answer: It is not possible to comment on every type and viscosity of oil that is available. Some higher viscosity oils may impact engine and fuel economy performance. Likewise for example, using a lower viscosity oil in an engine that requires 5W30 oil may not provide appropriate lubrication and may impact engine and fuel economy performance. Always follow GM recommendations and only use the oil specified in the GM Service Manual and/or the GM Owner Manual for the appropriate Model Year/Vehicle/Engine.

 

Edited December 18, 2022 by elcamino

[BigBadSierra]

To start with Oil is not Oil anymore. The viscosity literally has less to do with the lubrication these days.

It's the synthetics and additives in modern oil that make it way different then just oil from even a few years ago.

 

GM's requirements for their oils Dexos  or Dexos D  ..  and the licensing of the names is only done if the oil it's on has the required additives at the ratios GM requires.

 

These have allowed for vehicles run with thinner oil and much tighter tolerances in the engine it's self.

 

So depending on the engine and how it was designed and the tolerances it uses. Yes you could damage the engine running the wrong specified oil.

 

Times are changing so mind sets need to adjust. Research the differences as I have the information is out there.