Quote:
Originally Posted by zen
You have the difference in cost between 87 and 93 at .25 in both cases. However, as the price goes up the difference in cost increases to .30 (if I remember from the past). Therefore, your analysis will not be correct relative to the future.
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Around here, when regular hit $4.50 a gal premium was almost $6 a gallon. Run your comparison with these numbers and you get;
gas 87.............$ 4.50
gas 93.............$ 6.00
City mod..........50.0%
lead foot mod...50.0%
miles / yr........12,000
Cost
MPG Gallons Yearly Monthly Daily
V6 18.8 640 2,880.00 240.00 7.89
V8 16.0 750 4,500.00 375.00 12.33
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1620.00 135.00 4.44
=> V8 costs 56.25% more