IF you want the best milage on your Diesle ,Use this info to help your own
application.I drive A 2005 Ford Super 250 modified to a 550.35 inch tires
I get on average 18 mile to the gallon on the freeway.Using Diesle #2 I
prefer Biodiesel .I get 25 27 miles to the gallon if I runn my propane
injection Freeway .Now if im towing its About 18 freeway with propane
without 14. If you have the stock air filter you must get rid of the darn
thing ,it sucks I use an air raid cold air intake life time waran filter
much much improvement.I also use a diablo power milage programer Many dif
makers of these so choose your own,propane injection verry nice you only
burn 70% of the fuel dumped into your engin,propane alows better emisions
and much better horse power not to say MILAGE.You burn 100% of the fuel.If
you run bigger tires than stock you need to have your ring and pinion
replaced to keep optimum power and milege I went from 373 to 456 gear do
to tire size.With my changes I have 500 horse power to the ground,I can
leave a vet at a light get a soda at the next light and wait to see the
look on the drivers face.I dont like to drive my truck like that but I did
have to try it.Something I almost forgot I dont recomend annyone running
their Diesel on strait propane ,You can but the heads will have to be
replaced about every 150000 miles.Propane added to your diesle is so small
does not harm at all in fact willclean the engine and emissions you can
laugh at the 4 bangers out there