have a 96 crewcab 4x4 it gets 10mpg highway, 7to8 mpg city nobrakes stuck on,has straight exhaust, k&n air filter whats wrong with this truck, does not smoke out the pipe

 

When's the last time you changed the fuel filter and washed the air filter ? How about the oil , PSDs love fresh oil . Are you leaking fuel ? I'll agree your millage sucks !

 

Just another thought .... Did you put on bigger tires ? checked tire pressure ?

 

Are your hubs locked in? That could be causing extra drag.

 

I have heard from others on this forum that when they switch over to winter fuel, it will decrease your mileage. I know I have dropped from 21 mpg to about 16 mpg (freeway) since the switch. You could try adding a fuel additive. I use Diesel kleen (white bottle) and it boosts my cetane level 4 points, which I imagine helps a bit. I also try and keep my RPMs below 2000 on all but my 1 to 2 gear shifts. Good luck.

Joe

 

what gears do you have??

 

Mine did the same thing , kind of a shock when you're use to getting 18/20 mpg and it all of a sudden drops to 16 !! palajoe , did you notice an increase in mpg when you started useing the DK ?

 

I have been using the DK since I got the truck in Nov, but the few times I haven't used it I noticed a 4 mpg drop from 21 to 18. Even with the cost of the DK, I figure I'm still coming out ahead with the mpg improvement. Just from looking at the jug of DK, I notice the white bottle only boosts 4 points where the grey bottle boosts a max of 6 points. But the white has the anti-gell additive so that is what I'll use until Spring.

 

That's a pretty good increase in milleage . I'm not concerned with fuel jelling though ( today it was 75 degrees ! ) . We're suppose to be near 80 by the end of the week .

 

thanks for the replys, my filters and oil has 800 miles on it, no drag on the hubs, the tires are one size bigger then stock, the fuel leak when the truck first warms up after i get boost i smell fuel the intake manfolds look wet were they meet the cyl heads

 

its not the winter blend because it been like this since the middle of summer

 

If you are leaking fuel that could be a big part of the problem . There are a couple of things that could leak fuel into the "valley" , fuel pump , filter regulator , vacume sensor and fuel lines . You could be leaking more fuel than you realize .