Originally Posted By: Geonerd
Bearing failures on a forced induction engine?
Running more boost than stock?
I'd suggest more HTHS to bump your Stribeck curve a few notches to the left. The idea is to remain on the hydrodynamic part of the curve as often as possible. All the additives in the world won't help if you your crank or big end bearings are seeing too much boundary-layer contact.
If you want to stick with Mobil, the 0w-40 or 10-30HM both increase high temp shear to 3.6~3.7 Heck, TDT 5-40 at 3.9 won't hurt anything. 10w-40HM is 4.1. 15w-50 at 4.5 is perhaps a bit thick, but if you're seriously winding on the boost, it may be just what the bearings need.
In my supercharged GT350, Mobil 1 15w-50 was very successful for my long distance high speed endurance runs in West Texas. 140 miles non stop @ maximum rpm in the heat of the summer.
Z
Bearing failures on a forced induction engine?
Running more boost than stock?
I'd suggest more HTHS to bump your Stribeck curve a few notches to the left. The idea is to remain on the hydrodynamic part of the curve as often as possible. All the additives in the world won't help if you your crank or big end bearings are seeing too much boundary-layer contact.
If you want to stick with Mobil, the 0w-40 or 10-30HM both increase high temp shear to 3.6~3.7 Heck, TDT 5-40 at 3.9 won't hurt anything. 10w-40HM is 4.1. 15w-50 at 4.5 is perhaps a bit thick, but if you're seriously winding on the boost, it may be just what the bearings need.
In my supercharged GT350, Mobil 1 15w-50 was very successful for my long distance high speed endurance runs in West Texas. 140 miles non stop @ maximum rpm in the heat of the summer.
Z