Oil weight for 5.3? 0-20 no good?

[CapnBob]

Since GM now recommends
Ow40 in 6.2 engines
What about 5.3?
Ow20 seems to thin

 

[OR VietVet]

 

[B-train]

I wouldn't use 0w-20 even if GM hadn't of changed their mind. It's a gimmick for CAFE. Stick with 5w-30 and you'll probably be fine.

 

[the 18th letter]

How much gas mileage does one gain by going from 5w-30 to 0w-20?

 

[homesick]

I wouldn't use 0w-20 even if GM hadn't of changed their mind. It's a gimmick for CAFE. Stick with 5w-30 and you'll probably be fine.

It's a CAFE gimmick, but it's one that carmakers have been forced into over the last 50+ years.

joe

 

[Z15]

They don't recommend 0W-40 in all 6.2L engines. Only those that are in the recall list that pass inspection, a band-aide so to speak with a 10 yrs / 150,000 mile engine warranty while owners sit back and wait for them to self-destruct.

All replacement engines call for 0W-20 as normal.

 

[viven44]

If your vehicle is under warranty it may be best to stick to manufacturer recommendations (0W-20) and change oil more frequently (no more than 5k miles)

Past the warranty period, would be best to stick to 0W-30 or 5W-30… These oil viscosities are already better than the CAFE-choice 0W-20—— if you are working the engine hard and a bit late on oil changes (long road trips) these viscosities will provide you the guardband you need.

I don’t see the point in pushing it all the way to 0W-40 unless your engine is very high mileage and could use a bit more help. (Or aged like heck in short time because of poor tolerances, lol)

Slowly going up on viscosity as the engine gets older is an old pushrod engine trick - nothing new here to be honest.

 

[fondupot]

I thought of it as well, been doing some reading. But I think I'll be staying with my 0W20 Amsoil for now. I'll stick to 5k-6k oil changes and just live with that.

 

[homesick]

LOL, I can't wait for a negative viscosity oil, like -10W30, to get invented.

joe

 

[PPV_2018]

LOL, I can't wait for a negative viscosity oil, like -10W30, to get invented.

joe

I believe that’s called rain water