Quote:
Originally Posted by 430Scud
Since 2020, I am told the M550iX owners manual states either LL-01 FE oil 0w-30 or LL-17 FE 0w-20 is approved (apparently retroactive to the previous N63s). But agree I would lean toward the LL-01 FE 0w-30. In fact out of warranty, I would use the LL-01 5w-30 or 5w-40 which has a much higher HTHS (high temperature, high sheer) rating. The "FE" versions I believe, are optimized for fuel economy.
HTHS of LL17-FE is equal or greater than 2.6 Only available in 0w-20
LL-01 FE is equal or greater than 3.1 Only available in 0w-30
LL-01 is equal or greater than 3.5 Available in both 5w-30 and 5w-40 note that both oil viscosities will be similar, in order to meet the LL-01 rating. So that means the 30 rated oil will be at the higher end of 30 weight oils, while the 40 rated oil will often be on the thinner range and still be considered a 40 weight oil.
Note that higher viscosity range, usually (but not always) correlates to higher HTHS. But you only know for sure by reading the specification sheets for each individual oil. If it has the LL rating, you know it at least meets the minimum HTHS ratings above.
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Once you are out of warranty move to Castrol 0W40.
N63 doesn't require new updated LL01 (2018 update).
Until then use LL01, preferably Pennzoil Platinum Euro 5W40 or even better Motul 5W40 X-Cess GEN2.