-=> Quoting Sean Dunbar to Bill Boogaart <=-
 SD> @MSGID: 1:381/95 b9b19ed6
 JD> Oil filters only. Oil doesn't break down but it can get contaminated 
rom
 JD> using cheap gas.
 
 BB> How John? I thought the fuel system on a four stroke engine was
 BB> seperate unlike that of a two stroke where the oil and fuel are
 BB> mixed.
 SD> I don't see where he gets that about cheap gas, but gas can get down
 SD> into the  oil from old gaskets, and if the carb is in poor shape and
 SD> floods the engine  when it's parked.  Awhile back I kinda screwed up my
 SD> carb and it dumped a LOT  of gas into the engine (the intake was quite
 SD> literally FULL)... I had to let  it sit a few days 
 I would agree with you about gas getting down into the oil after a major
 engine flood. I had an old Holley carb. who's float valve stuck, the engine
 had enough cubes' that it kept running but it did not run very well. As in
 your case, the intake was very full! I just let it sit for several days.
 The only thing that keeps combustion gases from going straight into the oil
 is the piston rings, and due to the way they are made the best seal that 
 they have is during the power stroke. If you have the engine off and the 
 cylendars are full of gas it will leak between the ring gap(s) and pollute
 the oil.
... Catch the Blue Wave!
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