ok, here it is. my 93 f-250, with the 5.8 l has a little over 150,000 miles on her. her exhaust has sprung a "little" leak on the manifold. this happened 3-4 weeks ago. start of hunting. anyway, i've noticed that my fuel milage sucks!!!!!! this i noticed maybe a week ago. any ideas?

 

If anything a leak would increase milage by increasing flow.

But thats just my 2 cents.

Adam

 

check your fuel filter.
and maybe run some injector cleaner.