91 or 93 Octane?

[Pitboss02]

Interested to see what everyone is running and impact to gas mileage and if people notice a difference

 

[BalorGrayJax]

I've only ran 93 with high performance tunes or snowmobiles. It's pretty difficult to find overall, and I don't see how you can justify using it day to day with any discernable difference without a tune.

 

[WTX]

I use whichever one is available. Only a few stations have 93 around here

 

[Ox3721]

Would run 93 or 94 if I could, but stuck with 91 in Arizona. Something I never understood is how and why the oil companies and refineries would want to make two (or 3) different premium grade gasolines. Some neighboring states have 93 for the same or lower price. Or is it possible that 91 and 93 are the same, just marketed differently based on specific states requirements and regulations? You’d think it would be more cost effective to just produce one premium gasoline.

 

[JohnyPython]

94

 

[Gsteve]

Best I can find…. Which sadly is 91 here. And it just hit 1.67 per liter. Do the math on that !!!!

 

[Trailmaker]

Interested to see what everyone is running and impact to gas mileage and if people notice a difference

I put 93 on the poll but since my last speeding ticket over the holidays, I have been running 87 and keeping the truck in Normal mode. Highway driving has decreased to 16.1 from 17.3 per the read out but… I have been only going 5mph over instead of 15 so that could be 100% the culprit for the better mileage.

 

[Gsteve]

Higher octane in these type or motors will always do everything better. Up to you if the cost is worth it. I’m going to start running 87 in the winter and 91 when the snow *** off. Or til I tune it

 

[Raptor R]

Higher the better. I run 94 here.

 

[AxelR]

California. 91 is all you get. Although you can find a couple pumps with race gas at $10/gallon (probably more now).