2014+ Gas Mileage (MPG) Topic

[glcbn]

Yes...but. http://en.m.wikipedia.org/wiki/Reid_vapor_pressure

 

 

That part of the sentence, "especially carbureted" engines. Not sure this RVP really applies to FI, especially DI engines.

Interesting to say the least. I still say it's our gov trying to baffle/confuse us with their never ending bullshit!

[MattUofM]

this is going 78 down the intersate in montana. went appx. 300miles from missoula mt to bozeman mt. up and down 2 mountain passes and some hilly terrain. didn't get a pic of the whole average. 600+mi round trip was 19.8 here is the pic from the way there, it was 20.3mpg. went up to 22.8 at some points. sorry the pic is crappy.

Edited November 28, 2014 by MattUofM

[RoadWarriorMax]

Had my truck for several months now here in California.

It's a 5.3 4x4 crew short box.

The mileage is dissapointing, on long trips including some steep grades the best I get is 19 mpg.

I'll admit, I am somewhat a lead foot, and drive between 75-85 on HWY.

I noticed my mileage detioriated a lot when the tires dropped below 30 psi, so I am maintaining them around 37 psi with improved results.

[KARNUT]

Had my truck for several months now here in California.

It's a 5.3 4x4 crew short box.

The mileage is dissapointing, on long trips including some steep grades the best I get is 19 mpg.

I'll admit, I am somewhat a lead foot, and drive between 75-85 on HWY.

I noticed my mileage detioriated a lot when the tires dropped below 30 psi, so I am maintaining them around 37 psi with improved results.

19 MPG is good at the speed, at 72 MPH I get close to 22 MPG on 93 gas. These trucks are bricks through the air.

[RoadWarriorMax]

Thanks for the insight, I'll keep that in mind.

[TJay74]

Anything over 70mph and the MPG will drop quick in these trucks. Sweet spot for the best MPG is 60-70mph.

[Mike1220]

Anything over 70mph and the MPG will drop quick in these trucks. Sweet spot for the best MPG is 60-70mph.

The MPG does drop pretty quick between 70-89. But at 90-96 it starts to level and at 97-115 it still gets around 12 mpg. These trucks feel so alive at 115MPH!

[nibael]

Mine gets pretty bad mileage at 180 mph. Maybe I should get a bed cover.

[calgator73]

this is going 78 down the intersate in montana. went appx. 300miles from missoula mt to bozeman mt. up and down 2 mountain passes and some hilly terrain. didn't get a pic of the whole average. 600+mi round trip was 19.8 here is the pic from the way there, it was 20.3mpg. went up to 22.8 at some points. sorry the pic is crappy.

lol...I turn ~2k @ ~70

[MattUofM]

lol...I turn ~2k @ ~70

 

mine is pretty much right on 2k in that pic. just looks of because of perspective

[calgator73]

Ahh...looked like you're doing close to 80

Duh...cruise 78 lol

You tach @ 80 what I do @ 70

Edited December 4, 2014 by calgator73

[MattUofM]

Ahh...looked like you're doing close to 80

Duh...cruise 78 lol

You tach @ 80 what I do @ 70

 

yeah. i usually do between 80-85, but there were quite a few cops out so i only did 3mph over limit. haha what really impressed me is theat it went into v4 at 78. didn't expect that

[calgator73]

I can't do that straight and level..74 maybe.

[MattUofM]

I can't do that straight and level..74 maybe.

 

 

 

ive heard that from quite a few people. i don't get why mine will do it. another guy i talked to at work has a Black A/T w/6.2 and he said his will go into v4 at high speeds also.

 

side note: i really wish i coul have a v4 override of some sort, so i could force it into v4 when i want

[calgator73]

 

ive heard that from quite a few people. i don't get why mine will do it. another guy i talked to at work has a Black A/T w/6.2 and he said his will go into v4 at high speeds also.

 

side note: i really wish i coul have a v4 override of some sort, so i could force it into v4 when i want

I will say that my mileage doesn't go down much below 18 at high speeds. I'll drop from 22ish at 70 to 18 at 80...brief stints up to 85 for a few miles results in a 25 mpg average of 17.5. My 07 Denali was much the same...but it was 18 @ 70, 80 or 85.