I'm thinking of getting a commuter car for work(80 miles round trip) and the EX fuel economy package is what I'm interested in. If I get this car I will use a semi synth 5/20 in the winter and non synth 5/30 in the summer based on what I've read here.
Motor Oil
FerrariChat.com - FAQ: Motor Oil Articles by Dr. Ali E. Haas (AEHaas)
Quote:
Originally Posted by Silver2010
I agree. Right now I'm using 5w-30 but may go to 10w-30 permanently. Unless you're consistently close to 0 degrees F, you don't even need a 5w.
Building oil pressure quickly at cold start is more important then flow. Even 10w oil flows to -33 F. Oil pressure is the critical issue on cold start. 0w and 5w oils provide a low oil pressure scenario until the oil thickens. 10w and 15w build oil pressure much faster.
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