LMM mileage better

pavetim

Member
Jan 10, 2011
299
5
18
Not sure if its normal for my truck but i had a 2007 LMM amd had it tuned and I would get close to 23mpg in highway going 70, 17 mpg city and towing my fifth wheel i got 11mpg. Now i have an LML that's tuned and I get 9mpg towing same fifth wheel, 17mpg on highway and 15mpg city. Kind of dissapinted in the LML mileage. Both trucks had full exhaust and deleted emission. Lml has different tires too but not sure that would account for that much difference.
 

KyleC4

Tech
Dec 30, 2016
470
48
28
Bay Area
Interesting. My co workers stock 2015 LML gets a combined 19.7 commuting to work. I'll ask him tomorrow what he gets when he tows his 12k lbs 5th wheel
 

beach_33

Member
Feb 18, 2008
704
0
16
des moines, IA
Interesting. My co workers stock 2015 LML gets a combined 19.7 commuting to work. I'll ask him tomorrow what he gets when he tows his 12k lbs 5th wheel

He must drive with an eggshell under his right foot. I would love to get 19.Anything ever in my 16
 

a8nistor

New member
Mar 28, 2017
5
0
1
Just got my 08 LMM. Still stock but I'll be tuning and doing the typical deletes after registration and smog crap is over. I'll be looking forward to better mileage.

Sent from my LG-H901 using Tapatalk
 

pavetim

Member
Jan 10, 2011
299
5
18
Its per the DIC but in my LMM the dic was accurate, ill hand calculate it on this one too later.
 

Josh154

Well-known member
Sep 28, 2015
1,220
85
48
Sioux Falls SD
My dic is almost always accurate as well. This was yesterday doing 80mph for 60 miles. I'm about to fill up and hand calculate it
 

joshd472

New member
Oct 10, 2016
254
0
0
My dic is always generous. I just fill up most times but seems like I average about 17 all around.

Yupp dic tell me I'm getting 21 in my lly. I've hand calculated it several time and I get 17 every time. I'm running 33's.
 

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
What size tires are you running on the LML?

I will tell you anything over a 33 will KILL mileage. I had 35's on my LLY so long I thought everyone was full of shit.

After running 265's and 33's on my LMM and then going to a 35 (34.5"), it killed mileage, like by 2-3 mpg overall, more than that when towing or in the mountians.
 

pavetim

Member
Jan 10, 2011
299
5
18
I have 275/75-18 if i remember right. Nitto ridge grappler. Lmm I had stock size Michelin ltx at2 on that one.