[Jackpine]

Originally Posted by JWBFX4

Glad you are happy with the purchase, yea it sucks that the fuel prices are creeping back up. I was running level 3 at 30 cents more, but got off in the boonies and they only had 87 so I have been on the tow tune for about 2.5 weeks and keep forgetting to run my tank down to empty. I might just hold off for the 87 perf though.

This is for both you AND Darren (and anyone else who cares to read it for that matter).

In spite of the fact that gas prices WILL ultimately go up, pay attention to the spread between regular and hi-test. Here in Arizona, for instance, the difference is about 20 cents. 91 octane costs close to $2.00. It's simple math to figure the percentage difference: Using hi-test as the baseline, 20/200 x 100 = 10%! If the cost of hi-test goes to $3.00, but the difference between it and regular stays about the same: 20/300 x 100 = 6.7% difference! I think, during the last gas price spike, that's about what happened - the price differential was not much different.

So, if you can get better gas mileage using the expensive stuff, you do even better as gas prices rise! Because your mileage improvement percentage stays the same! Sure, you are paying more for a tankful, but we all are.

You can do the math on mileage too. I get about 15.5 mpg on the highway now using 87 and Bill's custom tune. If I chose to burn 91 octane and could get 16.5 mpg, I'd be getting (using the higher mileage as a baseline): 1/16.5 x 100 = 6.06% better mileage. If I was able to get 17.0 using the high-priced stuff, it would be a 1.5 mpg improvement or: 1.5/17 x 100 = 8.8%!

So, it's entirely possible it would cost you less to fill with the expensive stuff if gas prices go up (and they will)!

Keep accurate records, because it might have an effect on your wallet!

- Jack