"Royston, Jerry" <gmr@OBPA.USDA.GOV> writes:

> I last changed my oil in May and have put on only 2,400 miles since
> then.  How important is the time factor in oil change frequency?
> Does oil go bad over time even when the van is not being used that
> much?  The 3,000 miles or 3-month (whichever comes first)
> rule-of-thumb seems to imply that it does.  I use Mobil 1.

Oil does not go bad sitting for that amount of time -- BUT -- if that
2,400 miles has been a lot of short trips where things did not get
fully warmed up that is pretty hard on the oil.

Mobil-1 in my experience should be good for a lot more than 3,000
miles.  But, my experience with it is not in a waterboxer, so I don't
know if they tend to be harder on oil.  Oil analysis would tell you
what the condition of your oil is.

Allan
--
1991 Vanagon GL