"Brian" <spam.is@ikilling.invalid> wrote in message
news:ioo2d.1968$yg.163@twister.nyroc.rr.com...
> Of course this makes sense, though I've always wondered about something.
> The oil was sitting in the ground for millions of years.

Not the stuff in your crankcase.

How does
> sitting in my car for 3 more months make it "go bad" faster, especially if
> I'm not driving it a lot.

Slightly higher exposure to combustion byproducts than above.