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Old 05-18-2011, 12:05 PM   #1
THEHMONGYAJ87
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Default What grade octane should I use?
Hi, I have a 2011 scion xD RS3 and just wondering if I should use regular or premium. I'm only asking this cause I notice the comp. ration on the 2zr-fe is 10.0 which seems pretty high for a engine that uses regular gas. Just want to hear xD owners opinions on this. Oh and can anyone give me some pointers on increasing mpg for my scion, like changing to a trd/k&n filter.

Thanks,
Hue
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