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Fuel economy: Hot vs. Eco tune  RSS feed
Forum Index » HOT Tune
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Joined: 24/11/2009 08:30:40
Messages: 1
How does the fuel economy compare between the Hot and Eco tunes? I'd expect mpg to take a hit if you keep the hammer down with the Hot tune, but does it still take a hit if you drive mildly?

Joined: 18/07/2009 22:51:54
Messages: 26
Location: San Antonio, Texas
IMO, I expected the HOT Tune to give a bit less mpg just by the nature of making more power at similiar rpm ranges. On the highway when cruising, I can get about what others with just the ECO Tune get...but...in the city driving I seem to get less even when taking it pretty easy. I still get better than stock and can get ~25mpg city which I could not get with the factory ECU. I have the OME lift...a bit bigger tire setup (235/75/16) and am very happy with the new HOT Tune.

2006 Jeep Liberty CRD...OME Lift...ASFIR Aluminum Skids and Steps...

DarbyWalters @ L.O.S.T.

Joined: 10/07/2009 07:25:47
Messages: 374
Location: Southeast Michigan
Below 80% throttle the ECO tune and HOT tune have the same engine efficiency for a given rpm and load. If one drives in cruise control both tunes would give the same fuel economy. The HOT tune tends to have slightly less fuel economy in real life for two reasons. First, it is sometimes too tempting to hammer down the accelerator and the HOT tune flows about 10-15% more fuel at full throttle. Second, the throttle map is slightly more aggressive than the ECO tune so it tends to launch harder from a stop, this also does not do any favors to the fuel gauge. As the fun factor gage increases the fuel gauge drops!!

Joined: 28/08/2009 19:59:32
Messages: 68
Yeah, I just got the Hot tune on the LTD. I will see where the mileage is at, but prolly not

Still Burnin Oil since 1992!
2010 John Deere 2305 3 cylinder Yanmar
GDE HOT!! Tuned 2006 CRD LTD Silver, Euro TC, GDE Tuned TCM, B&M Trans drain kit
GDE ECO Tuned 2006 CRD Sport Black, B&M Trans drain kit, Front and rear hooks, Full Skids
GDE ECO Tuned 2005 MB 2500 Sprinter Van
2010 MB 2500 Sprinter Van
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