87 VS 88 VS 89 OCTANE

[huntergreen]

I wouldn't run 15% ethanol. Imho, you would be better off running 87 top tier gas.

 

[22hemi13]

Chevron 87 or Sunoco 87 90% of the time

 

[ripping r]

I have been running 89 since new. 4000 miles now. but i have done a lot of reading on this. and i will be going to ethanol free 87. for a few tanks to test it.

 

[HammerHead]

I have always been running 87 octane since day one. After reading on the forums most feel that I should be running 89 octane.

my local Kwik Trip has:
87 with 10% ethanol
88 with 15% ethanol for 5 cents less a gallon than the 87

My other choice is:
89 with 10% ethanol at my local shell This is 40 cents more a gallon than the 87.

40 cents more a gallon can add up to be a fair amount of money at the end of the year. I do not tow anything heavy except towing the boat is summer. When towing I think it is best for me to run 89 octane.

However which grade would you run when not towing during the rest of the year?

This is what I've been getting this winter. 2018 6.4

Ethanol Free 87= 334/25.5=13.5

89= 371/26.7= 13.8

89= 370/27.4= 13.5

89=312/22= 14.1 Highway

93= 371/27= 13.7