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I suspect that oil turns acid from gasoline at least as much as from LPG
because most gasoline has some sulfur in it, and both produce CO2 as exhaust.
One of the things that reduces the acidity is to make sure your oil runs hot
enough to be dry. Typically oil temp should be about 100°F or 55°C hotter
than the coolant under continuous operation in warm temps so this is not
a problem. When it is cold and especially with short trips, the oil accumulates
moisture and will become acid with any hydrocarbon fuel. But the acid formed
will be much more corrosive if there is sulfur involved, as in most gasolines.
--
George Downs Bartlesville, Heart of the USA!
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