Originally Posted By: CATERHAM
Originally Posted By: dailydriver
Also, the Red Line 5w30 you want to use is the same exact HTHS viscosity as the Mobil 1 0W-40 in your sump now.
The N52 engine does not require a heavy 3.8cP HTHSV oil and Red Line 5w30 is actually heavier on start-up than Mobil 1 0W-40.
I suggested Red Line 0w30 (same POE/PAO, high moly, high ZDDP chemistry) for it's more appropriate 3.2cP HTHSV and similar VI to Mobil 1. It's a shear stable oil that has an operational viscosity on par if not higher than the BMW 5w30.
In fact if it were my car, my Red Line oil choice would be their 0W-20 as it really is a light 30wt with the same viscosity as the BMW LL-01FE 0W-30; and that's as heavy an oil as necessary for street use in the OP's car.
I was not even considering specs, or requirements, just commenting on that there is no operational full temp viscosity difference between those two oils he was comparing.
Originally Posted By: dailydriver
Also, the Red Line 5w30 you want to use is the same exact HTHS viscosity as the Mobil 1 0W-40 in your sump now.
The N52 engine does not require a heavy 3.8cP HTHSV oil and Red Line 5w30 is actually heavier on start-up than Mobil 1 0W-40.
I suggested Red Line 0w30 (same POE/PAO, high moly, high ZDDP chemistry) for it's more appropriate 3.2cP HTHSV and similar VI to Mobil 1. It's a shear stable oil that has an operational viscosity on par if not higher than the BMW 5w30.
In fact if it were my car, my Red Line oil choice would be their 0W-20 as it really is a light 30wt with the same viscosity as the BMW LL-01FE 0W-30; and that's as heavy an oil as necessary for street use in the OP's car.
I was not even considering specs, or requirements, just commenting on that there is no operational full temp viscosity difference between those two oils he was comparing.