Originally Posted By: phlfly
Castrol doesn't claim anymore that Euro Castrol is Group IV.
Why am I asked? I asked because I thought people has knowledge about Mobil 1 oil, to see if 0W-30 is too light for that engine even in winter time, as HTHS 3.0 and Vic 100 C 10.9 compare 5w30 HTHS 3.1 and Vic at 100C 11.0,
Your operational tem is 100C. The 150 C I saw on M3 (used be owned) only when I drove like a mad men switching gears at 5,000- 6,000 rmp.
Also why AMG, Porches, Audi engine are using Mobil 1, did you think for sec it's better oil then Castrol?
MB, Porsche etc are using Mobil 1 same as BMW is using Castrol, VW is using Castrol etc, it is agreement between those companies.
Now, those oils that are used by MB, Porsche or Nissan GT-R is 0W40 oil which is LL-01 oil, HTHS 3.8.
Do not be naive man, 100c? 150c? Are talking about your coolant temperature? I hope you do understand that coolant temperature does not indicats what is happening inside the engine, on camshafts, valves etc.
Also, 5-6000 rpms? Man I do that everyday on my VW CC.
Also, no Mobil 1 is Group IV, and yes Castrol 0W30 is Group IV bcs it is made in Germany and it is sold overthere as Fully Synthetic oil, which means it has to be made from Group IV or V.
Anyway, putting M1 5W30 in BMW 550i is crime against that car manufacturer
