that is pretty good for a 4x4. when you rebuilt it did you use the stock cam or did you use something like an RV cam? i don't think you would get any better mileage unless your truck was 2wd.

 

my 82 is getting at least 10mpg. i will get a more accurate numbers next time i fill up the tank. i just hope my speedometer is accurate.

 

my 81 is getting about 9mpg in town and 13 on the highway. definitely need to get those numbers to go up. think i might need to lean out the rear barrels on the carb.

 

1993 D250 cummins i get 21 highway 17 city

 

I drove very conservatively this week, going to school now so I have to. Averaged 14 with the a/c on all the time, never went over 2500 rpm.

 

I have a dodge D200 w/ a 440 and the mileage seems to be dropping.A couple months ago I was getting about 14-15 a gallon on the freeway but I am now getting about 9-10.What is the average mpg for a truck with this size engine?I have looked all over the internet and I can not find a good answer anywhere.

 

actually, mythbusters did a test on it, and you get better milage with the tailgate up. best if u get an airgate.

 

I averaged 15 on my last fill up. That's after cleaning the injectors and running some seafoam though the top end of the engine. A/C on all the time too. If my converter would lock around 45 like it used to, instead of 55-60 like it does now, I'd be around 16 I think.

 

1989 W250 with 4:10s and 3 speed auto, got 13 once. I was very excited that day.

 

I replied to a specific post, but it didn't put my post where that person's post was?...