Quote:
Originally Posted by M2M
Terry, what would it take for someone to convince you to use a different oil...or would you rather be dragged over burning coals than change to say 20w-50? 
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I don't know...... I used Aeroshell 15/50 in aircraft engines, 20 years ago, but they're air-cooled with large clearances. The 15/40 is working pretty well, I don't see any reason to change. I'm not alone in this, in another poll, the Shell Rotella was the most popular brand and weight used in model A s Then there's the ZDDP thing. What exactly is wrong with it?
Terry