All octane does is prevent detonation (preignition of fuel before the spark plug fires) in higher compression engines. The 4.0, 2.5, and 2.4 are NOT meant to use 91 octane. It can actually hurt performance by delaying ignition.
As of last week I am the proud owner of my first-ever Jeep! 2005 TJ. I absolutely love it
However, the gas mileage is a bit of a shock I'm getting about 320kms (200 miles) for a full tank. That's roughly 57 litres or 15 gallons of gas.
Is this normal?
Are you filling the tank, recording the mileage, running the tank low, filling the tank, recording the mileage. Recording the number of liters/gallons to refill and dividing that number into the number of miles/km driven between fill ups.
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
I have 31's with no lift and get around 17-18mpg, but I get to use cruise a lot because my drive to work is 90% highway driving. I would love to put a 2" lift on, but I'm just worried about how far that would cut into my mileage. Still thinking about it though, but I'd have to put bigger tires on too. One thing leads to another...
2005 Jeep Wrangler Sport
1982 Datsun 280ZX All right. I warned ya'. Move that rice-burner or I go Jeep all over your a$$!
That's about what I get but I see ALOT of stop n go driving so that kinda kills my mileage.
I had that same problem so I changed my work hours and route to keep from all the stop and go. It sucks leaving for work at 5:30 AM but I don't get tied up in rush hour traffic. Even if I leave at 5:45 I'll catch the start of the rush hour here.
Thanks everyone! I appreciate your responses. I have oversized tires (not sure how big - I will check) so that's probably affecting it. I will start following close behind big rigs on the highway to save fuel!
1997, 2.5L, 5 speed, 235 75/R15's. All stock, although I think the stock tires were 215's. Had it a month and am consistently clocking 19 mpg. As low as 18 if I drive hard and up to 20 if I drive easy. Happy
Just did 150 miles down and 150 back on the interstate (doing a dog rescue transfer) overall average was 18 mpg running 73mph. 4.0 auto 5500+ foot altitude (we lose about 15% power) and stock 16" wheels 265 70 tires at 35psi--FWIW.