Quote:
Originally Posted by aerobod
The LL-01 test mainly adds the need for long oil life above other oil quality tests, so a non-LL-01 oil may not have suitable properties over a 25,000km/15,000mile life. Changing a non-LL-01 oil more frequently than the BMW recommended interval would be advisable. If the car is still warranted by BMW, then using a non-LL-01 oil could void your warranty.
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Quote:
Originally Posted by Turbolader
This is exactly the reason why only LL-01 oil is used in my car. When I am out of warranty, will I use something else? Probably, but until then, she only drinks the expensive kool aid.
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That's the theory, of course.
In practice one can achieve the same goal, as mentioned above, by changing oil more often.
That's what I do. During warranty, I let the dealership change the oil at their specified interval. At mid mark, I throw in my own oil change. I don't see how a non-LL-01 oil (given the right viscosity) can be bad since it's an extra oil change, above and beyond the recommendation.
Even out of warranty, if I use only non-LL-01, I'm changing oils twice as often. Oil longevity is simply not an issue.
My reason for doing this isn't even that I don't trust the oil will last that long. I don't trust the filter will last 15K miles.