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Old 03-29-2013, 07:51 PM   #33
def
Ginger th wonder dog
 
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Joined: Feb 2004
Location: The woods and mountains of Alabama
Oddometer: 9,587
Quote:
Originally Posted by genka View Post
OK, I'll ask a question that's been bothering me for a while. The oils with the low number after the "W" are recommended for cooler ambient temperatures. Why do the ambient temperatures matter if the working temperature inside the engine is much higher?
Cold starts, pumpability, rheological losses are reasons to use a low W oil in cold clmates.
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