I noticed the manual indicates that only in North America (USA) is the 0w20 oil spec'd... it's 5w30 in place pretty much everywhere else in the world. Does anyone know if there's any differences in the engine that would warrant this?
I'd really prefer to use the 5w30 oil and I believe the 0w20 is only spec'd because Mazda's trying to pump up their CAFE fleet fuel economy numbers. I don't think 0w20 contributes that much economy to an individual vehicle (maybe a couple tenths of mpg). It only makes a difference across a huge fleet of vehicles so it's much more important to Mazda than me.
I'd really prefer to use the 5w30 oil and I believe the 0w20 is only spec'd because Mazda's trying to pump up their CAFE fleet fuel economy numbers. I don't think 0w20 contributes that much economy to an individual vehicle (maybe a couple tenths of mpg). It only makes a difference across a huge fleet of vehicles so it's much more important to Mazda than me.
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