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      03-27-2011, 12:40 PM   #5
Nahoa
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United_States
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Drives: F25 35i Mineral Silver/Black
Join Date: May 2008
Location: Virginia

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Use the highest available. This engine will appreciate it. Usually $1.75 difference per tank. If you can afford the car and a Morning latte, you can probably cover the $2 per tank. You get a bit better mileage, when you want to zip it zips better, and it burns a bit cleaner. But, if you wanna save about $104 dollars a year, then the lower grade is for you.
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