Octane rating?

[Jtski007]

Midrange 89 of regular 87?

 

[ram1500rsm]

91 but i have my own tune.

 

[McBroom]

I use 87 when not towing which is 95% of the time. 18 6.4 2500

Blue Mule

 

[Pull Ya]

89 before the tune-now 93
Jay

 

[McBroom]

89 before the tune-now 93
Jay

Now if we could only get you to lift it like Jack's old silver Ram

Blue Mule

 

[Pull Ya]

That will happen when I get a taller garage and the boss grows about a foot taller.
Jay

 

[McBroom]

Lol. Gotta mess wit ya.
I'm gonna tell her what ya said. Lol

Blue Mule

 

[RVGuy]

89 because that's what the good book tells me.

 

[Jerrybob]

89 makes her purr...….20+mpg most of the time.

 

[Rampower2012]

I use the 87 in mine

 

[Wild one]

Midrange 89 of regular 87?

The majority of trucks probably never see 89,and run just fine on 87.If you're tuned or running a few bolt ons then 89 for sure,but a stock truck will run fine on 87

 

[Burla]

My truck drives like **** on 87, I wish costco had 89, I end up using a mix 91/87.

 

[Rampower2012]

I have no bolt on just stok

 

[MidwestExpress]

I fill up at half tank each week and alternate between 87 & 91.

 

[tidefan1967]

Should have had a box for both. I run 89 when its cheaper(less than $2.50) and 87 when its not. Hell I buy E15 88 pretty frequently too because its actually .05 less than E10 87. I bought some week before last for $2.00 even per gallon. Gas mileage sucks this time of year no matter what I run anyway.

 

[CamperMike]

I run 87 octane as the truck runs fine on it. I'm sure I'd get a bit more power on 89 but I don't know if it would be noticeable. I highly doubt any gained fuel economy from 89 would offset the cost.

 

[Iiplus]

89 I Would experience 3 mpg difference on my biweekly drives from NC to Alabama for business

 

[Jerrybob]

Manual says it will run on either but 89 is preferred and recommended.

 

[Lucy Girl]

Lol. Gotta mess wit ya.
I'm gonna tell her what ya said. Lol

Blue Mule

lucy already did. LOL

 

[Bigskyroadglide]

I run 91 pure gas, or 93 blended. If nothing else is available, I run highest octane sold, pure gas if available.

I travel a lot via truck.

Pure gas gets better fuel economy and my tune is built for 91