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04-02-2007, 01:28 AM
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#1 |
  
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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Premium Gas
okay, to make this short, i filled up with premium gas at Chevron, the only place i ever get gas...i drove on average of 70 mph...and i just filled up again and calculated my mpg...i got 39 mpg. ????? when i fill up with regular and drive at an average of 65 mph, i get 36-38 mpg.
 but yeah, i'm not sticking with premium, just wanted to test it out. can anyone tell my why i was able to get better gas mileage with premium? i didn't think it mattered which grade fuel?????? |
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