20+ mpg with Kennedy economy tune

[Mark Rinker]

I have read for years on TDP about 20mpg trucks, but rarely been out of the mid-teens myself.

This last weekend I drove a 400 mile roundtrip to deer camp, loaded with gear, but no trailer. A rarity! Got 20.2mpg for the trip, and that included a few stretches with cruise set at 76mph, some full throttle blasts on the haul/ass setting, and 6 miles of muddy wooded roads!

I think the truck would do 24 if you drove 400 miles under 65mph with no heavy foot.

Amazing - especially for 170K miles on the odometer!!! The fresh set of injectors certainly helps.

[Kennedy]

Yes it can be done...

[rob from bc canada]

Anyone reporting similar results on an 05??

I was able to get just under 19 out of my 3500 empty stock on a long trip BC interior recently.

Should I realistically expect to gain 1 or 2 more mpg?

Also, what is the effect on performance/mpg when hauling a load as shown above??

[ToddMeister]

I also get 20mpg with J/K's economy tune in my 05 GMC

[Kennedy]

Todd, I have a few minor tweaks to make for your tuning. Not necessarily related to mpg, but more to driveability of an already super smooth tune.

[LanduytG]

Been testing JK's econo tune since Aug and I have over 10K on the tune. My best was 20.1 at 62. JK is going to do some tweaking for drivibility and then it should be done. This is all with stock 245 tires as well. What I like is the get up and go without have a cloud of smoke.

Greg

[nlp]

How much does this "econotune" cost????

[Kennedy]

I'd rather not get into a pricing discussion here. Please take a minute to look at my web site and you'll find what you are looking for and then some. Duramax Performance/Kennedy Custom Don't forget to read the descriptor page outlining the product and then select your engine.