Originally Posted by ppl85
Is there much of a difference between the 87 tow and the 93 tow? How would the 87 tow perform with 93 in the tank vs 87? I am wanting to get one of these and trying to figure out my tunes i would get. What tunes are recomended? I usually use 87 but have access to all other octanes in missouri. I do occasionally tow but want performance
I ran the 87 tow all the time, but with premium when I towed and got about 10 mpg with a 9K fifth wheel. Then I tried the 89 tow with 89 and got 9.5-10. Finally I tried the 89 tow with premium and got 11 mpg from Vermont to Virginia and back. The next tow, I will try the 91 tow with premium (obviously). I will probably use the 89 performance tune when not towing as premium is often a .40/gallon premium here.
The 87 tow tune is a good all around tune if you don't want to be bothered switching them and want to keep fuel costs low. When not towing, I have found no difference in fuel mileage between 87 and premium.