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FastCR 09-29-2008, 06:53 PM Hey guys, first post in this section, my dad just picked up his LMM last week. He drives between 75-90 mph. Just wondering what kind of milage to expect. The PSD with 411s in the ass got 12.5. Is the LMM gonna do any better? dr_unspoken 09-29-2008, 07:14 PM Haha depends if the dpf is deleted or not. Deleted at the speed and stock tires expect 13-16. With the dpf pry 11-14. Deleted at 65-70 17-21mpg. stock 16-19 kgt 09-29-2008, 08:24 PM Don't expect to much a 90 mph. SHODWN 09-29-2008, 09:02 PM I get about 15 in town, and have seen 22 on the highway.. but it averages 19.7 on the highway. and 15-16 towing a 7500lb load at 70mph. FastCR 09-30-2008, 01:35 PM he actually says he got 14 actually calculating it out. Now to talk him into straight piping it for that additional 4mpg. :D mxrider801 09-30-2008, 02:21 PM he actually says he got 14 actually calculating it out. Now to talk him into straight piping it for that additional 4mpg. :D I'm running a straight piped LMM and there isn't a 4 mpg gain, at least not for me. I've gained 1 maybe 2mpg but I'm running the 90hp tune not the econ. I ran econ for a little and the mileage didn't seem to go up so I bumped it to 90. edit: I mostly run short trips. So most of my driving is warming it up. If i do any continuous driving I've seem some pretty good numbers but not 4 mpg. The other night I was running 16.7 mpg all city and I was playing with some dodges too. sledbert 09-30-2008, 03:59 PM From my experience, the key to better MPG's is less MPH's. 11-14 @ 90mph sounds pretty darn good. I see quite a mpg drop from 60mph to 70mph & even more with more mph metalhead 09-30-2008, 08:22 PM We have 18000 miles on the LMM now, and only once have we even been close to 21 mpg. Most freeway tanks average 18.7 - 19.4 mpg hand calculated with gps verification. In town we get a disappointing 14 mpg. Stock tune still... bjadamsr6 10-01-2008, 03:29 AM What speed are you running? badinblack 10-01-2008, 09:39 PM We have 18000 miles on the LMM now, and only once have we even been close to 21 mpg. Most freeway tanks average 18.7 - 19.4 mpg hand calculated with gps verification. In town we get a disappointing 14 mpg. Stock tune still... X2 FastCR 10-02-2008, 12:39 AM What speed are you running? x2 FastCR 10-02-2008, 08:46 PM follow up: He reported 13.5 mpg and just called me telling me he needs the top speed governor removed, so I guess my speed assumption was a little low. :lol: I'll post back next time he fills it up. Someone has to do a no BS fast driving mileage check, right? | ||