Quote:
Originally Posted by Jordo!
But... running too cold (say, 165* F), especially under high load, is generally worse than running a little hot, as far as maintaining proper lubrication.
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There has been some discussion on this over on my vette forum. Interesting to note that '76 L-82 vettes, and some other model years, came from the factory with a 160 thermostat. Base engines had 180 I believe. Hotter running engines are more emissions friendly but a colder running engine is better for performance, so the debate goes on the vette forum. Knowledgeable folks, like engineers, agree that 160 is the minimum oil temp to protect the engine and 180 may be about ideal.