Am I gonna notice enough of a difference to pay the extra 15cents per gallon for 89 over 87
Thanks

 

Doubt it.

I have used 87 and 91 (shell canada) and there is a significant difference. 87 -> 91 would be my minimum separation in tunes. 93 would be preferable but shell ain't offerin' it up here.

My highway MPG is much better with 91 so $$$ is a wash. City driving is different on 91 because I like to "giver 'round town" - it's part of my daily entertainment!

 

Down here in Missouri, all we have is 87,89,93.

 

Maybe you have 93 in STL, but over here the highest we have is 91.

 

kickers, when I got my tunes 5star offered a "perf/tow" which allowed for your trucks max towing numbers. So I ordered 87 perf/tow, 91 economy (little to no towing recommended) and a 91 perf/tow. I mainly run the 91 perf/tow since I tow a boat once a week. Even if I didn't tow I'd run this tune from spring to fall because it's fun. I have no need for 91 in the winter since I'm just spinning my tires in the snow, I don't tow, and highway driving is minimal so I switch back to 87 for the snow months.

If you can get 93 in your area I would be taking advantage of it with 1 of your 3 tunes.

Let us know what you choose and review them once you try them out

 

Seems now on 5star you don't have the option for perf/tow tune. Gotta purchase them separately which sucks being 140 for two.

 

Give Mike a call and speak with him and have him address your questions/concerns. Inquire about the perf/tow, maybe he's renamed them to avoid customer confusion???

See what he says