09-19-2019, 08:51 AM
Professional Nap Taker
5-Year WF Supporting Member
WF Lifetime Member
Join Date: Jan 2014
Location: Glenpool, OK (Tulsa)
I've never seen anything that improves gas mileage, all have been snake oil.
If you've changed your tire size you need to tell the computer what you've done to correct the speedo. Also any MPG the Jeep computes will be inaccurate until this is done. There are several options; Superchips, AEV, Bully dog all have programmers. Some of them even offer "tunes", but again IMO they're snake oil.
The newest kid on the block is Jscan for updating gear, tire size, etc. I switched our 2018 JK from superchips to Jscan just to check it out. So far I really like it, an it's super affordable.
HERS-2018 JK- Gobi- (WOOKIEE) Build Thread
HIS- 2014 JKUR- Copperhead Pearl (BRUTUS) Build Thread
Retired 2016 JKWW- Firecracker Red (MAXIMUS)
Retired 2013 JKUS- White- (THOR)