The Mobil 1 guy told me today Mobile 1 is good to 470 degrees F while
organic motor oil breaks down at 270 F.

Paul Lamar

Speaking of Mobil One, how often should I change the oil?
With Pennzoil I was changing the oil at 50 hours, I've got
about 60 now on the Mobil One.

Racing Beat recommends maximum oil temp into the engine
210 degrees.  What determines this temperature, the oil
scraper rings?  Something in the engine itself?  (I don't have
the book in front of me).  Would Mobil One allow you to
run higher oil temps (even though you may not want to)?

--
Perry Mick
Duckt N7XR
http://www.ductedfan.com

Good question.

That could be any one of a number of things. It could be the stock
oil-control rubber O-rings or it could be just to
cool the rotor and main bearing material. On the other hand the apex
seal runs up there around 500 degrees F so it could be to enhance
the heat transfer between apex seal/rotor and oil. Next time
I am talking to Jim Mederer I will ask him this question. Also 
once we get some experience with the teflon seals and high oil temp 
perhaps we will find out what the real number can be. Chuck Is building
an engine with the teflon oil control O-rings. In theory these should
be good to 500 degrees.

BTW the guy said 7000 mile oil-change for Mobil One in a car.

Paul Lamar
 
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