What type if gas you use?
JK Junkie
Joined: Feb 2012
Posts: 3,499
Likes: 162
From: brick, nj
I'm stock except for rubi takeoffs for wheels/tires. My trailer weighs anywhere from 3500 to 4500 depending on loading. My trailer also has a huge frontal sail area that doesn't help.
JK Junkie
Joined: Feb 2012
Posts: 3,499
Likes: 162
From: brick, nj
That's a difficult statement to make. When you ran 93 octane did you drive exact same routes with same vehicle speed same wind speed in same direction? Was ambient air temperature the same? Was traffic the same? I ran 89 octane in one tank and got 17.1 then with next tank I ran 92 and got 13.2 cause I wheeled for 7 hours. So simply providing a mpg graph without all varibles is useless. IMHO
JK Junkie
Joined: Feb 2013
Posts: 2,013
Likes: 0
From: West Richland Washington
Yes, the 93 octane trips were from NJ down to the south east corner of North Carolina. Pretty much a straight shot down I95 at 65 mph. I do have some additional variables recorded in my log book. My point about needing more than one tankful to know if there is a statistical difference can be seen looking at parts of my data where I am not towing. I think that +/- 1mpg is well within the noise from one tank to the next. So if you make a change and see a 1mpg improvement you can only be sure that is real if you see that over several tankfuls, not just one.
JK Junkie
Joined: Feb 2012
Posts: 3,499
Likes: 162
From: brick, nj
Why can't you run less than 93? I had a ford explorer once. After it crossed around 120,000 miles it developed a spark knock, pre ignition. It would lose power when passing on the highway as a result. I discovered that running 93 octane fixed the problem. I did that for about 30,000 miles because I never felt like fixing the actual root cause. Occasionally it got less than 93 by mistake and the spark knock would return almost instantly.
JK Enthusiast
Joined: Jun 2012
Posts: 108
Likes: 0
From: Johnston, RI
Why can't you run less than 93? I had a ford explorer once. After it crossed around 120,000 miles it developed a spark knock, pre ignition. It would lose power when passing on the highway as a result. I discovered that running 93 octane fixed the problem. I did that for about 30,000 miles because I never felt like fixing the actual root cause. Occasionally it got less than 93 by mistake and the spark knock would return almost instantly.
Its very common for those ford 4.0's to knock...Ive never seen one that hasnt done it.
JK Newbie
Joined: May 2013
Posts: 57
Likes: 0
From: Ohio
I'm running 87. I just drove out from Ohio to Nevada and back. Averaged 22.1 on the return trip (per the dash computer, not calculated). I stopped wherever I needed to and had no particular brand that I stuck with. JK 6-speed 3.73. I do have a hard top, so that might give me slightly better mpg than a soft top.
JK Junkie
Joined: Dec 2012
Posts: 2,203
Likes: 4
From: Jacksonville NC
I put in 87 octane gas from Sam's club. I try to find the best deals on gas. Most gas in the east coast is processed through the same hubs and then sent out VIA truck or pipeline. So I'm buying whoever is the cheapest.