0w20 vs 0w30 ?

[tblt44]

0w-20 will be just fine.

Considering I'm running it in my 2002 Silverado 5.3. Back when in 2002 0w-20 wasn't even on the market. My UOA's are just fine and I even tow a 4klbs trailer. Also here in eastern NC it gets up into the upper 90's in the summer and the humidity is 90%.

To each their own but to me thicker isn't always better. There are more and more vehicles out there running 0w-20 and getting into the 100k plus mileage with no issues.

Wow running 0w 20 in a 2002.
I had piston slap in my 2002 sierra. Got me a new engine at 16k.
She went till 268k when my daughter parked it and got a car.
Anyways don't think I would have ran 0w 20 in it

 

[rondhol]

It's more about who make the engines. Generally, Toyota, Mazda, Honda non turbo engines have low wear regardless 0w-20, or older 5w-30 oil. What interesting is newer VAG that use 0w-20 show lower wear than engines with 504/507 0w/5w-30.
The older 0w-40 is not that popular anymore because not compatible with ACEA C2 C3, C5 standard for catalytic converter and DPF on regular cars. For sport cars like GTR, Civic type R or Supra BMW, I still believe it needs 0w-30 or 0w-40. May be 10w-60 when race on track.

 

[Gene K]

The older 0w-40 is not that popular anymore because not compatible with ACEA C2 C3, C5 standard for catalytic converter and DPF on regular cars.

Are speaking about the grade in general or specific older formulations?

M1 ESP X3 0W-40 is C3.