Geonovast Posted November 5, 2008 Share Posted November 5, 2008 I know my 2.5 is running weird...but I took it on a 1000 mile (round trip) trip this past weekend and I got weird mileage readings. All the way down (filling up 89, 90 or 91 octane) I got about 15-16 mpg. I blamed it on that it wasn't running right. On the way back, I filled up with 87, and it went up to 23 mpg. At half tank I filled up with 88, and it went back down to 16. Then halftank again put in 87 and it went back up to 22. Can't check my 4.0 since there's a leak halfway up the tank. What kind of mileage is everyone getting? Link to comment Share on other sites More sharing options...
Geonovast Posted November 5, 2008 Author Share Posted November 5, 2008 I know my 2.5 is running weird...but I took it on a 1000 mile (round trip) trip this past weekend and I got weird mileage readings. All the way down (filling up 89, 90 or 91 octane) I got about 15-16 mpg. I blamed it on that it wasn't running right. On the way back, I filled up with 87, and it went up to 23 mpg. At half tank I filled up with 88, and it went back down to 16. Then halftank again put in 87 and it went back up to 22. Can't check my 4.0 since there's a leak halfway up the tank. What kind of mileage is everyone getting? Link to comment Share on other sites More sharing options...
offroader461 Posted November 5, 2008 Share Posted November 5, 2008 The last tank i got b4 i pulled the head was 23MPG... Link to comment Share on other sites More sharing options...
offroader461 Posted November 5, 2008 Share Posted November 5, 2008 The last tank i got b4 i pulled the head was 23MPG... Link to comment Share on other sites More sharing options...
mvusse Posted November 5, 2008 Share Posted November 5, 2008 My 4.0/AW4 4x4, running 235/75R15 I get about 16 around town, 19 at 75mph, 21 at 70mph, 24 at 65mph, all running 87 octane. Mileage has been corrected for tire size. I was afraid the 4.5" lift was going to affect highway mileage, but it seemed to have had no effect. Link to comment Share on other sites More sharing options...
mvusse Posted November 5, 2008 Share Posted November 5, 2008 My 4.0/AW4 4x4, running 235/75R15 I get about 16 around town, 19 at 75mph, 21 at 70mph, 24 at 65mph, all running 87 octane. Mileage has been corrected for tire size. I was afraid the 4.5" lift was going to affect highway mileage, but it seemed to have had no effect. Link to comment Share on other sites More sharing options...
deziped Posted November 5, 2008 Share Posted November 5, 2008 Octane level doesn't seem to make any diff on MPG in the 2.5 or 4L. I notice a mileage diff based on load (200# or more it starts dropping), when driving into a wind (there have been times when traveling the 150 miles of I-84 along the Columbia the wind has cut my mileage by 1/3), and trying to stay with traffic flows. Heck, cans of "off the shelf" octane boosters have no effect either. Only 2 things give me improved mileage; driving like the lil ol lady & checking MPG going down hill only. :dunno: Link to comment Share on other sites More sharing options...
deziped Posted November 5, 2008 Share Posted November 5, 2008 Octane level doesn't seem to make any diff on MPG in the 2.5 or 4L. I notice a mileage diff based on load (200# or more it starts dropping), when driving into a wind (there have been times when traveling the 150 miles of I-84 along the Columbia the wind has cut my mileage by 1/3), and trying to stay with traffic flows. Heck, cans of "off the shelf" octane boosters have no effect either. Only 2 things give me improved mileage; driving like the lil ol lady & checking MPG going down hill only. :dunno: Link to comment Share on other sites More sharing options...
mvusse Posted November 5, 2008 Share Posted November 5, 2008 If higher octane gives you lower mileage, maybe your timing is not advanced far enough. Link to comment Share on other sites More sharing options...
mvusse Posted November 5, 2008 Share Posted November 5, 2008 If higher octane gives you lower mileage, maybe your timing is not advanced far enough. Link to comment Share on other sites More sharing options...
BLHTAZ Posted November 5, 2008 Share Posted November 5, 2008 Ours gets about 15-17, but it never gets driven much more than about 10 miles at a time and not usually more than 40 - 45 mph. It would probably do better if I would get the gears done, but I am running 31x10.50 Swampers with 3.07 gears. I need to go to 3.73's... Link to comment Share on other sites More sharing options...
BLHTAZ Posted November 5, 2008 Share Posted November 5, 2008 Ours gets about 15-17, but it never gets driven much more than about 10 miles at a time and not usually more than 40 - 45 mph. It would probably do better if I would get the gears done, but I am running 31x10.50 Swampers with 3.07 gears. I need to go to 3.73's... Link to comment Share on other sites More sharing options...
Car RamRod Posted November 5, 2008 Share Posted November 5, 2008 I've seen 24mpg pretty regularly on trips here in the NE (slight hills and such). On one trip on LI I was able to see 25mpg. I'm hoping with an alignment and those fancy injectors people are using (mine are at 260k), I can see 26. Thats on 87 octane. Link to comment Share on other sites More sharing options...
Car RamRod Posted November 5, 2008 Share Posted November 5, 2008 I've seen 24mpg pretty regularly on trips here in the NE (slight hills and such). On one trip on LI I was able to see 25mpg. I'm hoping with an alignment and those fancy injectors people are using (mine are at 260k), I can see 26. Thats on 87 octane. Link to comment Share on other sites More sharing options...
Oizarod115 Posted November 6, 2008 Share Posted November 6, 2008 i get a consistent 18.5 around town, thats driving like a normal person, not wild, not PaPa. on the road usually 21 if i drive PaPa i get 19.5-20 depending on if i can keep it up the entire tank Link to comment Share on other sites More sharing options...
Oizarod115 Posted November 6, 2008 Share Posted November 6, 2008 i get a consistent 18.5 around town, thats driving like a normal person, not wild, not PaPa. on the road usually 21 if i drive PaPa i get 19.5-20 depending on if i can keep it up the entire tank Link to comment Share on other sites More sharing options...
voltageyz0 Posted November 6, 2008 Share Posted November 6, 2008 for some reason i get 11 Link to comment Share on other sites More sharing options...
voltageyz0 Posted November 6, 2008 Share Posted November 6, 2008 for some reason i get 11 Link to comment Share on other sites More sharing options...
aemsee Posted November 6, 2008 Share Posted November 6, 2008 87 2.5, AW4, 4X4, 4.56 gears, 235/75/15's. 22-24 mpg. I drive it like an old lady. Link to comment Share on other sites More sharing options...
aemsee Posted November 6, 2008 Share Posted November 6, 2008 87 2.5, AW4, 4X4, 4.56 gears, 235/75/15's. 22-24 mpg. I drive it like an old lady. Link to comment Share on other sites More sharing options...
ComancheKid45 Posted November 6, 2008 Share Posted November 6, 2008 I'm usually around 12 in town and 15-16 on the Hwy towing a Trailer with 2 Quads My Speedo is NOT corrected though and I'm running 30/9.50/15 Tires so i imangine its a bit better than what I'm calculating :dunno: Link to comment Share on other sites More sharing options...
ComancheKid45 Posted November 6, 2008 Share Posted November 6, 2008 I'm usually around 12 in town and 15-16 on the Hwy towing a Trailer with 2 Quads My Speedo is NOT corrected though and I'm running 30/9.50/15 Tires so i imangine its a bit better than what I'm calculating :dunno: Link to comment Share on other sites More sharing options...
carnuck Posted November 10, 2008 Share Posted November 10, 2008 My 4 cyl got more economy (25 mpg average) with the lower octane stuff AND had more power. I drove to Ouray, CO in '02 with 3 adults, a canopy, tool box, spare parts and 3 spare tires (ended up needing all of them after my alignment was wrecked by a delivery truck in CO) Total weight was 6,000 lbs. 2.5L with almost 200,000 miles, ax-5, NP207, 4.10 gears and 30" tires. We cruised at 70 mph most of the way (I had to downshift only when I tried premium gas in the mountains) The reason for this is that modern higher octane fuels have additives that slow the burning rate and in so doing cut the power drastically but the motor doesn't ping. Link to comment Share on other sites More sharing options...
bigd44889 Posted November 10, 2008 Share Posted November 10, 2008 ok i get 14 to 15 on 87 octain 23 to 24 on 97 octain but i have 2.5 4 speed 31x10.5x15 bored .40 over and camed up if driving into the wind it is all cut in half mt's stick out 4 inches from front fenders Link to comment Share on other sites More sharing options...
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