2009 Mazda 3.7L oils

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Jun 17, 2009
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Im looking for some 3.7L(5-20w on the cap) data on the 2009 Mazda 6 or maybe the CX-7/9. The owner's manual states pretty much use anything oily from 5/10 20s-40s. I know its impossible to pick an oil for best protection w/o testing but I if one didn't care about mileage what would an oilguy pick? Currently running M1 5-20w and looking at PP 5-40w maybe. We can also use this post to compile 3.7L data.
 
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JeepRubicon2k3

Thread starter
Joined
Jun 17, 2009
Messages
70
Location
CONUS
I know right! I should just run the thing, but I like to tinker and I like to change oil, lol. M1 meets the high standard ACEA A1/B1. Is there a reason people are running 0s? I live in MD so warm/hot weather.
 
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