Quote:
Originally Posted by Gords_zenith
Seriously, you have nothing to worry about using Mobil 1 with the twins, I have 49000km on my car and it hasn't burned a drop. They are brand new design and have nothing in common with the old engines that supposedly(I say supposedly cuz it's rumoured as I have no personal experience) used to burn quite a bit of oil.
I've run Mobil 1 0W-20 AFE for the first 15000km or so before switching to Castrol 0W-30 (which isn't API certified-"could" void your emissions warranty due to the high phosphorus content=anti wear, hard on have catalytic converters) and now I'm back to Mobil 1 using their 0W-30 AFE (API certified GF5), and I'm getting a little better mileage, too early to say for certain though, as it's only been ~2000 km so far. I also have a UOA of Castrol 0W-30, that I intend to put up at some point. Anyways that's all.
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Castrol 0W-30 is indeed API certified, although it meets the older API SL spec. The phosphorus content is only slightly higher than current GF5 oils. Although, it's nearly a 40 weight at operating temp and I would only use it in a forced induction or tracked 86.
-Dennis