What Octane Gas Are You Going To Put In Your JL?

What octane gas are you planning on running in your JL?


  • Total voters
    715

jeepingib

Well-Known Member
First Name
Dusty
Joined
Jun 26, 2018
Messages
1,347
Reaction score
3,819
Location
College Station, TX
Vehicle(s)
18' JLUR Punk'n
Always the highest octane!

It's only a couple of bucks difference. It's what your engine uses to run. It's the heart and soul of how your rig runs.

Dont be cheap!
Except that running a higher octane than what is necessary is not beneficial for your engine and can possibly even cause more carbon to build up than a lower octane that will burn more efficiently. Octane ratings are determined by how resistant to ignition the fuel is. The lower the octane the easier it is to burn. Higher octane fuels have additives that make them less likely to burn, making them more stable with higher compression engines and forced induction, but reducing the amount of energy that the same amount of fuel can make.
Advertisement

 

word302

Well-Known Member
Joined
Sep 13, 2017
Messages
3,543
Reaction score
3,800
Location
Oregon
Vehicle(s)
JLU
Except that running a higher octane than what is necessary is not beneficial for your engine and can possibly even cause more carbon to build up than a lower octane that will burn more efficiently. Octane ratings are determined by how resistant to ignition the fuel is. The lower the octane the easier it is to burn. Higher octane fuels have additives that make them less likely to burn, making them more stable with higher compression engines and forced induction, but reducing the amount of energy that the same amount of fuel can make.
Stop it with all these scientific fact-type things. This forum was only meant for opinion and hyperbole.
 

rallydefault

Well-Known Member
Joined
Mar 17, 2018
Messages
1,040
Reaction score
1,202
Location
PA
Vehicle(s)
'18 JLU Sport S
Lol - so many entertaining comments.

I don't know. I'm not a scientist in this area. I know it's the thing lately to question companies and everything is a big conspiracy, blahblahblah.
But if the company that makes the car recommends 87, I'll go with the 87.
 

Johnbuz

Well-Known Member
First Name
John
Joined
Oct 24, 2017
Messages
101
Reaction score
82
Location
Pittsburgh
Vehicle(s)
Subaru Tribeca
I run 93 to reducing the knocking/pinging under load at 1800-2000 RPM. Several threads going about it. The user manual even mentions it. But 93 reduces the knocking/pinging. Its a shame that any modern motor does it, since the last time I heard it was in my 1980's Kcar.
 

Johnbuz

Well-Known Member
First Name
John
Joined
Oct 24, 2017
Messages
101
Reaction score
82
Location
Pittsburgh
Vehicle(s)
Subaru Tribeca
I run 93 to reducing the knocking/pinging under load at 1800-2000 RPM. Several threads going about it. The user manual even mentions it. But 93 reduces the knocking/pinging. Its a shame that any modern motor does it, since the last time I heard it was in my 1980's Kcar.
To clarify, I have the 6 speed.
 

jmcdtucson

Well-Known Member
First Name
Jerel
Joined
Jun 17, 2018
Messages
698
Reaction score
652
Location
Tucson, AZ
Vehicle(s)
2018 JLU Sport S
Vehicle Showcase
1
Same thing, 93 (or even 91) quiets the 3rd gear 1500-2000 rpm pinging. Yeah, mine runs on 87, but it's demonstrably quieter on 91 or 93. Can't explain it. Manual here as well. Also hot climate. I may revisit 87 in the winter.
 

smithrd65

Well-Known Member
First Name
David
Joined
May 11, 2018
Messages
812
Reaction score
680
Location
San Antonio
Vehicle(s)
2018 Jeep Wrangler Rubicon Unlimited JL. BMW Z4 35is, Tesla Model X90D, Chevy 2500 LTZ
I put what the manual calls for anything else is a WASTE OF MONEY. 87
 
Advertisement

Jim Marsh Chrysler Jeep
 
Advertisement
Top