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DirtyMax
09-14-2009, 04:01 PM
was my average MPG from West Bend to Oak Creek today. Hand calc and DIC always seem to be within a tenth. My first good freeway run since being fully synthetic in the engine, trans, front/rear ends and t-case.

Cruise was on 5 over the whole way so about 50% at 60mph and 50% at 70mph. A/C blasting the whole way. Bone stock too no additives! :headbang

Maybe it was Chad's secret deezel blend at his Shell station?!?

JohnnyT
09-14-2009, 07:20 PM
Holy Chit!! :thumbsup

DirtyMax
09-14-2009, 08:32 PM
If I dumped the DPF that screws me out of 2 gallons of fuel every tank and got a tuner with a economy tune in it, could probably crack 30. But GM was kind enough to install a "big brother" into the ECM of these new LMM trucks that keeps track of the last 10 flashes... :flipoff2:

Rocket Power
09-14-2009, 09:13 PM
If I dumped the DPF

http://www.torcarr.com/images/Milw6523_21.jpg:rolf:rolf:rolf:rolf

DirtyMax
09-14-2009, 10:33 PM
I'm not ready to give up my 100k warranty just yet, ;)

Anakonda69
09-15-2009, 08:33 AM
yeah no need to lose your warranty. just remember with a tuner your dic will be off for gas mileage. miles driven is fine but the mpg is off by about 2. thats what mine is off with my ppe. i still am getting 18-20 mixed and 24+ on solid freeway trips. i just filled up at that shell yesterday so well see what my mileage is with the special mix. lol

Yeehaw
09-15-2009, 11:26 AM
damn i was happy with my 22.5 on the way to rhinelander......

Monstr913
09-15-2009, 11:43 AM
damn my truck is 16 all day driving like old lady hammering on it pulling a trailer anything i do never gets an better or worse...

jon_we4
09-15-2009, 12:02 PM
Hand Calculated I've never hit more than 20.5. Then again I never drive that slow and most of my road trips are at 75-80mph.

Stock with a 85HP Predator tune, I never hammer it so I figure its safe and best for economy.

I want to do an exhaust and do a road trip at lower speeds just to see what's possible. I just don't think I have the patience. The trip to the in-laws is 10 hours and I just try to make it go as quick as possible. Plus its 75mph all the way through MI.

Anakonda69
09-15-2009, 12:21 PM
i think it has to do with that large pump in your driver's side wheel well tyler. lol

nitrous
09-15-2009, 05:59 PM
60% injectors suck...

SmokinRAM114
09-15-2009, 06:08 PM
my gfs nieghbor is getting around 20mpg with a 36ft travel trailer behind there 07.5 3500!

DirtyMax
09-15-2009, 10:24 PM
my gfs nieghbor is getting around 20mpg with a 36ft travel trailer behind there 07.5 3500!

That's about what I got with the same size trailer behind it. :headbang

SmokinRAM114
09-16-2009, 04:55 PM
That's about what I got with the same size trailer behind it. :headbang

thats crazy. atleast they have that lmm figured out. when i had a 08 ford 6.4 CC SB plow truck that thing got 6mpg with a 8' plow on the front:punch: if they would go back to a lock out style front end on ford or dodge the fuel mileage would greatly increase

DirtyMax
09-16-2009, 11:27 PM
Yeah, if only they would have left well enough alone and let diesels breathe (DPF)

Cryptic
09-17-2009, 09:39 AM
my 98' 2500 gasser got 13.5mpg going up north hauling about 2500-3000 lbs of stone in the bed. pig slow and lots of gas, but that's money I didn't spend on a diesel truck. some day maybe :(

DirtyMax
09-17-2009, 09:51 AM
Yeah I think I read that it takes about 75-80K miles to make up the difference in the additional cost of the diesel engine versus the fuel savings. Seems about right by a quick calculation.

Anakonda69
09-17-2009, 09:56 AM
my 98' 2500 gasser got 13.5mpg going up north hauling about 2500-3000 lbs of stone in the bed. pig slow and lots of gas, but that's money I didn't spend on a diesel truck. some day maybe :(

Guessing thats a small block? that's decent. 454 or 496 bic blocks would have been about 8mpg. lol my brothers 8.1 got like 11 in the city with nothing in/on it. truck had hella nuts though. lol

Monstr913
09-17-2009, 10:47 AM
hey the only reason my lift pump gives me bad mileage is cuz i can't keep my foot out of it, lol...i love my diesel but that 8.1 was fun as hell, pissed i never took it to track

last time the burban was on the street it was getting like 5-7 mpg lol