I used the recommended castrol TWS for a while in my M3 (s65 engine) and recently switched to M1 0w40 a few oil changes ago. UOAs have been good with the M1 but I have been thinking about a different combination...
What do you guys think of running a 50/50 mix of castrol TWS and castrol 0w40? Any reason it would be a bad idea to mix these two? I'm wondering if it could be the goldilocks "perfect" mix of cold start and operating temp protection. Thanks for any input!
What do you guys think of running a 50/50 mix of castrol TWS and castrol 0w40? Any reason it would be a bad idea to mix these two? I'm wondering if it could be the goldilocks "perfect" mix of cold start and operating temp protection. Thanks for any input!