What octane gas?

[Matt72]

New to this forum so thank you to anyone who reads this. Just bought a 2019 Ram 1500 limited 5.7 hemi. Curious what octane gas everyone is running?

 

[dutchman187]

Welcome.

87 or 89 Gas which do you use?

Me and friend are going back and forth on the type of gas to put in our trucks. So I have a 6 cylinder etorque and he has a 5.7 hemi. Does it matter what engine you have and what is recommended. Sent from my iPhone using Tapatalk

5thgenrams.com

91 vs 87 octane towing performance

Just had a really interesting trip towing my boat. I tow a 4000 pound pontoon - so say 5-6000 pounds loaded with gear gas and trailer - but the main issue is it’s a giant wind sail. 3.92 limited with e torque. Anyway I left town, full tank of Costco 91 gas (because it’s cheaper than most other...

5thgenrams.com

 

[Idahoktm]

The manual recommends 89 octane, but says 87 is acceptable. I have been running 87 for all 700 miles on my truck without any knocking.

 

[brian42]

The Owner's Manual also recommends Top Tier gas...

TOP TIER - High-quality Fuel Performance Standard - TOP TIER™

TOP TIER is developed and enforced by some of the leading automotive manufacturers and supplied by participating fuel retailers.

www.toptiergas.com

 

[CMil527]

Welcome!

 

[paulmarsh22]

You'll find plenty of answers/opinions in those threads, but I've been running 87 in mine for the past 13k miles with no issues. No decrease in mpg either. That being said, I don't ever really tow anything, just mainly highway driving.

Congrats on your purchase and welcome!

 

[Johnny_H]

I just had this happen.

91 vs 87 octane towing performance

91 vs 87 octane towing performance

Just had a really interesting trip towing my boat. I tow a 4000 pound pontoon - so say 5-6000 pounds loaded with gear gas and trailer - but the main issue is it’s a giant wind sail. 3.92 limited with e torque. Anyway I left town, full tank of Costco 91 gas (because it’s cheaper than most other...

r.tapatalk.com

Lots of guys (including myself) just go with Costco premium because it’s cheaper than most mid grade, and still top tier. I don’t find a huge difference between 89 and 91, but my truck definitely feels weaker and has worse mileage with 87. This is very apparent with towing or hard driving, less so just bumbling around town.

I’ve run three tanks now at various times with 87 when mid or premium wasn’t available, and interestingly the truck seems to almost instantly adjust performance, while it seems to take around half a tank for the truck to “recover” once I put better gas back in.

This is of course based on no data just how the truck feels and me casually observing mileage. I will say I’ve had similar experiences with my RS5 and then actually proved it with draggy data, but I don’t care that much about my truck.


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[MannymanX]

Been running 87 since day 1. A ton of knocking at WOT but I don't give a sheep...

 

[Fatherof3]

Welcome to the forum . I run either 91 or 89 depending on what I'm going to do with it .

 

[Matt72]

Thank you everyone for your input and to this forum. I’m going to continue to run 89 and try to keep this motor happy for a long time

 

[ekaz]

You need ALL the octanes!

 

[RAM Patriot]

The HEMI is 10.5:1 compression ratio. 89 octane fuel is recommended for optimum performance and fuel economy by Mopar.