Just added 1 entire quart of M1 0w-20 SL (out of SM)to the old Saturn, 4K into the OCI. Filled the crankcase with M1 0w-20 SM originally. About 1500 miles ago, added about 1/2 quart of M1 15w-50 to thicken things up a bit.
PP 5w-20 was consumed about the same rate.
Pennzoil dino 5w-20, very little consumption--maybe 8oz per 4K--not much at all.
Anything in the 30wt or higher range and the engine doesn't consume any noticeable quantities over a 3-4k OCI.
Why would 20wt PAO or GIII consume at a higher rate than any other viscosity or 20wt GII+ ??
PP 5w-20 was consumed about the same rate.
Pennzoil dino 5w-20, very little consumption--maybe 8oz per 4K--not much at all.
Anything in the 30wt or higher range and the engine doesn't consume any noticeable quantities over a 3-4k OCI.
Why would 20wt PAO or GIII consume at a higher rate than any other viscosity or 20wt GII+ ??