Originally Posted by Fanatichuman
Switch because Rotella T6 is highly recommended on e46fanatics and my OCI is coming up, and because it has more detergents than Castrol 0w40. T6 is 5w40. I want to add the LM oil saver cause I have a bunch of dripping oil leaks that I do not want to pay 1k+ for and don't want to do myself either (at least RMS). LM oil saver seems to be highly recommended without downsides. Edit: Yes, high mileage, I have 250k miles.
I personally don't think you will see a difference. I guess it will not hurt anything but at most I think it will be a feel good move. T6 is good oil but in my mind the Castrol is hard to beat. Do you think the leaks are from some kind of sludge problem and that is why you think you need more detergents? If it's leaking bad enough I don't think any additive will help, at least I never had luck with them.