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Ive been running Rotella T6 in my e36 1997 m3 for a number of years but now have a newer 06 330i that i run Castrol 0W40 in for the LL01 certification. I'd like to run the same oil in both cars to make things easier. How do you guys think the Castrol 0w40 would do a in a e36 engine at the track...

2006 bmw 330i with the NA N52 straight 6. I have previously been using longlife-01 Castrol 0w30 and switched to longlife-01 Castrol 0w40 since its cheaper, available locally, and so i can just buy one type of oil for it and the old m3. I have have noticed around another quart of oil consumption...

i am asking this for a friend... The car has 137k on it and burns about 1 quart every 1000 miles and has run dino oil its whole life. Its currently driven ~100 highway miles a day. This particular engine design has known oil consumption issues, which from reading seem to be from the material...