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what octane to use for S80T6? S80

Based on what you said I did some calculations.

1.30 gal reg 320/15 = 21.33 mpg
1.45 gal prem 360/15 = 24 mpg

24 - 21.33 = 2.67 mpg increase.

1.45 x 15 = 21.75
1.30 x 15 = 19.50

21.75 - 19.50 = $2.25 per tank difference

The cost to run the regular gas the (same distance) as the premium:

320 miles / 15 gal = 21.333 mpg, 360 miles / 21.333 gal = 16.875 gallons of regular to run the same mileage as premium fuel. 1.875 Gallons more.

16.875 gallons x 1.3 = ($21.9375) compared to ($21.75) to run premium fuel the same distance, or $.1875 more.

Huh?






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