Quote:
Originally Posted by SenorFunkyPants
I don't think there is anything wrong with letting your engine idle for a short while especially in a cold environment. The recommendation not to let your car idle on start up is most likely an anti pollution recommendation rather than an anti wear one.
The engine manufacturers start up procedure for the piston engined aircraft I worked on was to idle the engine until it reached a particular oil temp before exercising the prop to circulate the oil and no one is more particular about wear and safety than the aircraft industry.
Myself, for my garaged car, I drive off pretty much straight away but I keep the revs less than 2.5k until the oil temp moves off the stop...no high rpm until its at normal running temp.
I think the rev counter that indicates that you can run 6k rpm on cold oil is just plain idiotic...there are no doubt plenty owners who think this means they can do just that and hence the high bearing wear rate.
"I think of the engine as a pump in this case, and increasing RPMs affect oil pressure, is this accurate?"
This bit is not totally correct in the sense that the S65 has a volume controlled oil pump with an oil pressure relief valve set to ~90 psi....ie the pump has a flow rate target not a pressure target. You put in thinner oil you will get the same flow rate but a lower pressure.
|
The high redline is needed for safety. Sometimes you need to floor it to get out of the way and avoid an accident