[DeTomaso] Oil temperature and wear

[JDeRyke at aol.com]

In a message dated 2/6/09 11:35:42 AM, kenn_green at yahoo.com writes:

> http://www.elephantracing.com/techtopic/oiltemperature.htm
> It looks like they think above 250 really accelerates wear.  It that a common 
view?

I'd think so, since std motor oil loses so much viscosity at that temp, its 
like water. Plus, if as is commonly done, you measure the oil temp in the oil 
pan, there are areas within an engine that see much higher temps- one article 
by an oil company with a fully instrumented V-8 found temps in the main and rod 
bearings were an average of 70 F hotter than the oil laying in the pan. Std 
oil starts to char around 290 F. Synthetic is thinner to start with, gets even 
more so at 250 but the char temperature is maybe 50 F higher than regular. 
This may be enough to save an engine that spikes to 290. FWIW, 250 F in the pan 
means 'take some of the load off the poor engine for awhile'! My 2¢- J DeRyke



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