There is some logic to using an upper cylinder lube with alcohol fuels.

Not so with gasoline, at least with modern engines. For older engines without functional air cleaners, which experienced faster cylinder bore wear, they also had a place.

And if one wanted to add oil to a fuel system one could use a low ash motor oil, like a two stroke engine oil.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
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