I have a 1987 f150 with a 4.9 6 cylinder which I thought was suppose to get 18 to 20 mpg. I filles the truck up with 60 bucks worth of gas and only made it 95 miles on that tank of gas. The truck sat for a year or so due to a bad fuel pump but we replaced it as well as the filter. I checked under neath for maybe a gas leak some where but found nothing. Can anyone suggest or might no what it might be?

 

you thought wrong lol

12-14 mpgs on a good day lol

your running right about 10-12 so your about average

 

I was just going to say, I used to have an I6, and 10ish was about normal. Congratulations, you own a 24 year old full size truck.

 

i'm getting 8 - 10 in my 89 F150 with a 302 HO V8 (from mustang)

 

im getting 16 with a 306 AODE transmission and 3:73 rear end

 

Its an 18 gallon tank though and I only went 95 miles. I think it avg out to be about 5.3 miles per gallon I would be happy with 14 mpg lol. Right now it is gett les mpg than my 500 hp mustang.

 

Tune up and Lucas fuel treatment. Bet the intake looks like a used furniture store with all the varnish. Then seafoam it.

 

ERROR CODES!
(My 87' 302 A/T w/87K miles gets 20 MPG @ 65MPH)

 

See link (Although I can't remember what it said/ Doubt much has changed though): https://www.f150forum.com/f10/can-i-...economy-52240/

 

my 93 will get 17 mpgs on the highway and bout 13 in town. try doin a tune up on it. when i had stock size tires on mine i could get 20