Quote:
Originally Posted by PackPride85
BMW is constantly updating their oil recommendations making the manual essentially "out of date". BMW recently revised most engines back to 2006 to prefer LL-01 FE oil at 0w-30 for all I6 gas engines instead of what most manuals at the time called for LL-01 5w-30.
The only difference is the minimum HTHS (high temp/high shear) spec. This determines how much viscosity is lost with high heat/stress. Higher is better. LL-01 HTHS minimum is 3.5 where FE is 3.0.
Summary: Someone at BMW came up with the idea that most of their I6 gas motors can get better gas mileage (higher CAFE rating) while sacrificing a little bit of viscosity. Probably wasn't an engineer that made that call...
|
Maybe, we just don't know without speaking to engineers. It's possible they always thought it would be fine but had to wait to validate it in internal testing. I'd guess it's fine for the bulk of street driven S55 cars.