gas milage

i replaced the cpi on my 95 blazer 4.3 vortec motor and now it seems the gas milage is terrible. I changed the air filter & pcv valve and im going to do the fuel filter and plugs. its getting 13-15 miles to gallon. whats the average? any ideas to increase the milage with gas at 2.25 a gallon every mile counts.

Hi ; The best you will ever get with a 4.3 engine is 20 miles to the gallon. The average is 18 . This is a fact, any one that tells you different never check there gas milage properly.

my 95 blazer gets around 20. cant get any better .best thing is to change plugs and wires.

my 95 blazer gets around 20. cant get any better .best thing is to change plugs and wires.
i did a 3 part fuel system cleaning and k&n air filter also ive done the throttle body mod wich i think helps on the highway rpms are much lower at higher speeds i think im right around 16-17 mpg i still have to do plugs and wires and havent doen fuel filter yet im guessin thos might bring me close to 20 all i can say to get any better is bump the tires up a couple psi and try to stay away from crappy gas lol

I do city and highway driving and i get consistently around 15 MPG