Quote:
Originally Posted by Yoshoobaroo
Now please can you send us a link to that E85 oil? I’d love to try it on my 335i.
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Anything that is GF-5 rated. Looks like it wasn't formulated for E85 specifically, just with alternative fuels in mind. Though like has already been pointed out, no dilution issue, no problem. Mostly it seems like it was developed around sludge protection since so many new vehicles have VVT to prevent failure with the solenoids.
Dexos I can't find any documentation on in relation to E85. Most of what I found is that it is GM specific due to the way 2011 and up GM vehicles calculate oil life and that if you aren't running a "Dexos" oil they can deny your warranty claim.
Emulsion testing is also an important part of GF-5 compliance, due largely to concerns about exotic fuels like E85 getting into the oil. As Dr. Sutherland explained, "GF-5 testing in this area is done to ensure that the oil can tolerate some fuel contamination without loss of performance. There's also seals testing done to ensure that GF-5 oil works well with new and old engine seals and gaskets, such as valve stem seals and front and rear main crankshaft seals. We have to be certain that the oil gets along well with any newly developed elastomers used to make seals."