js

i get mid 20,s with my 3500 with no trailer and around 18 to20 pulling a 30 foot travel trailer.

BigBlue

Best I got was 25 crusing at 70 on a trip to Oklahoma last summer. Usually get about 14-16 in the city (sorta heavy foot). My worst tank yet has been 11 and that was because I had just gotten the comp installed and I needed to "test" it out. :

BoostnBenz

Did anyone notice much of a difference in mileage (corrected) when changing to bigger tires like the 305/70/16s? Are there any other things you can do to make noticeable improvements? (tonneau cover maybe?)<br><br>Of my two 300DTs one gets 24ish (winter blend :P) and the other gets 28.5mpg (summer only). So I'd be sacrificing 28.5mpg or a little better to get a truck which appears to get approx. 22mpg in those same conditions. However my 300DT's mileage is slaughtered going much quicker than 60mph. I like the Jetta TDI (can get ~50mpg) but it is just to small for me to consider (safetywise).<br><br>Also what kind of 1/4mi would one of these 3/4 4x4s turn stock? What is the fastest one out there? Thanks for the hint BigBlue. <br><br>Thanks for all the replies.

phox_mulder

Mine seems to get slightly less per gallon with my 315's.<br><br>But, I have been using GPS for odometer correction, and have forgotten to turn it on for a couple short trips, so I don't have accurate figures yet.<br><br>I did do one long freeway run and got 14.5 mpg, about what my average city/highway was with the stock tires.<br>This is on winter fuel though.<br><br>Once my Superlift Truespeed is working right, I'll post some accurate numbers.<br><br><br>phox

Dojman

I tell you what boys, mpg dont mean much. It doesnt say what you drag or how you drag it, know what I mean? I have to say that and make myself believe it cause I have only once had a ctd that got over twenty. These are empty figures, with probably 70/30 highway(short trips generally)to city ratio. <br>90 reg cab ton dually, 2wd 5 spd-15<br>95 reg cab 2wd auto/OD -21<br>96 ext cab 4x4 5spd-19<br>98.5 ext cab ton dually, 2wd 5spd-14<br>01 qc ton dually, 2wd 5spd- 16 (sick now: 13mpg)<br>

Cold Diesel

I say it all depends on how you drive it. I can get 22 in the summer, not speeding on the highway. I can also get as low as 13 with the comp all the way up smoking ricers and other diesels around town. Mileage is directly proportional to the right foot.