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What grade Octane gasoline do you use?

What grade of gasoline octane do you use & Why? Also state what size motor?

8K views 49 replies 27 participants last post by  WBSRT 
#1 ·
I'm just curious what grade fuel everyone uses. I have a 3.7 and I was using 87 for a while. One day I was running on fumes and I rolled into the gas station and I decided to splurge on 95. Oh what a difference! It runs smoother and idels quiter, and shifts better. For the .20 per gallon difference it's worth it IMO. I know it's only a 3.7 so every little bit helps. LOL
 
#2 ·
i have an 08 3.7 and i use 87... nate did u get 95 or 93?

---------- Post added at 04:03 PM ---------- Previous post was at 04:02 PM ----------

and what gas station do you get your gas from?

---------- Post added at 04:03 PM ---------- Previous post was at 04:03 PM ----------

shell is suppose to have the best gas!
 
#3 ·
I use 89.

2005 non flex fuel 4.7 V8.

I noticed almost immediately when i bought my WK that it kinda ran rough on 87, tried it for a while and it was ok but not perfect. Tried 89 for a while and its much smoother. That and a master jeep tech recommended it for the 4.7. The little pamphlet that was in my owners manual also says to use 89.

For the 10cents more per gallon id rather have the 89. and supposedly there is less ethanol the higher grade you go and ethanol on non flexfuel engines even in the small 10% quanity they put in gas can still screw up sensors and other seals and such in any engine.

I try to only buy from Irving or Cumberland farms/Gulf or HESS
 
#4 ·
I use 93 or 95 depending on whats available. I usually go to Hess, Sunoco, or I hate to say it Gulf.
 
#7 · (Edited)
Other for me...

I use 99, only the best for my baby! Pity I only have a '91 tune though...:lol:

Edit: Just read the title... Engine is a 4.7L and I use 99 as it's only slightly more expensive than regular (95).
 
#10 ·
Isn't Gulf owned by Exxon/Mobile? Half of the Exxon's and Mobile's by me turned to Gulf stations...
 
#17 ·
6.1L / 93 Octane / Exxon, Shell V-Power or Amoco Ultimate / Why?.....Only the best for my baby. Plus, the Diablo said to use 93 or higher for the canned tune I put in.
 
#18 · (Edited)
Hi I'm A Mac!!!
I set it up where you can select more than one option to vote Irf... LMAO ;)
 
#23 ·
I dont use gas........i use rocket fuel

---------- Post added at 07:23 PM ---------- Previous post was at 07:22 PM ----------

and I'm not stating my motor size...cause I'm a peckerhead....LOL
 
#27 ·
Anyone able to find ethanol-free gas where they are?

There is a convenience store right next to my subdivision and they have ethanol-free gas. I can definitely tell a difference when I fill up with 93 as compared to when I fill up at a station that has "up to 10% ethanol".
 
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