Gas Milage
Gas Milage
Posting Guru
Joined: Dec 2002
Posts: 1,297
Likes: 3
From: Billings MT
Well, here we go:
1. Good Tuneup - high quality plugs and wires, cap, rotor, correct timing
2. Good Free Flowing Intake - use a good paper filter
3. Good Free Flowing Exhaust - Size will depend on motor displacement
4. Properly Inflated Tires - This can affect mileage significantly
5. And last...Keep your foot out of it.
With 3 out of the 5 ( no intake work yet and a little heavy on the gas), I just got 14 mpg with my 1990 F250HD 4x4 5 sp Ex Cab with 4.10 gears going 70-75 mph. I'm hoping for close to 16 once I get my intake done.
This is assuming you don't have any stored codes like a bad O2 sensor, etc. If yo udo have codes, fix those areas first.
1. Good Tuneup - high quality plugs and wires, cap, rotor, correct timing
2. Good Free Flowing Intake - use a good paper filter
3. Good Free Flowing Exhaust - Size will depend on motor displacement
4. Properly Inflated Tires - This can affect mileage significantly
5. And last...Keep your foot out of it.
With 3 out of the 5 ( no intake work yet and a little heavy on the gas), I just got 14 mpg with my 1990 F250HD 4x4 5 sp Ex Cab with 4.10 gears going 70-75 mph. I'm hoping for close to 16 once I get my intake done.
This is assuming you don't have any stored codes like a bad O2 sensor, etc. If yo udo have codes, fix those areas first.
Tuned
Joined: May 2005
Posts: 436
Likes: 0
From: MI
I've done some little things. I've done the tune-up, free flowing exhaust, keep up on bearings, brakes, and tire pressure and I see 18-20mpg with a 94 F150 w/302, E4OD, 3.55 gear, and MAF equipped. I took off all of the emissions(no check in Michigan). I've also put in an electric fan and messed with some pulley sizes to reduce accessory drag on the engine. I'm heavy into the throttle at times so I really see 17-18mpg, but have gotten it up to 20 with moderate driving. And all I have done with the intake is put on a air pick-up snorkle from an F250(better location and flow) and a K&N drop-in filter.
What jbalestri suggested does work. You should first make sure you don't have any stored codes for problems that need fixed and that your vacuum pressure is good.
What jbalestri suggested does work. You should first make sure you don't have any stored codes for problems that need fixed and that your vacuum pressure is good.
Thread Starter
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Freshman User
Joined: Sep 2005
Posts: 38
Likes: 0
From: Charleroi PA
Thanks
ill try some of that stuff. also i was talking to a buddy who said to leave the tailgate down if at all possable he said its worth about 2-3 mpg and a cap will doubble your mpg. thanks and keep them comming
Tuned
Joined: May 2005
Posts: 436
Likes: 0
From: MI
I think it was a set-up used for the towing package. It came this way from the factory. I think either you or someone else asked this question in another thread or two. I know I don't have the only truck on here with this set-up stock.
Now, if you do just mainly city, stop and go, slower driving, a cap's weight will hurt your mileage. A tonneau is a more preferred choice. And, on some trucks, having the tailgate down actually decreases mileage. It can take away that pocket of pressurized air that sits in the bed at higher speeds and can actually increase your drag. I'm not sure if this study was done with an F150 or not.
Originally Posted by spacedout
ill try some of that stuff. also i was talking to a buddy who said to leave the tailgate down if at all possable he said its worth about 2-3 mpg and a cap will doubble your mpg. thanks and keep them comming
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Posting Guru
Joined: Dec 2002
Posts: 1,297
Likes: 3
From: Billings MT
I agree with RC Dan. Someone (a college) did a wind tunnel study with a truck with the tailgate down and up. It actuallly showed higher drag coeff at a certain speed (highway I think) with the tailgate down. A smooth cover (hard plastic recommended like ARE makes) is preferred even over a cloth tonneau cover.
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Thread Starter
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Freshman User
Joined: Sep 2005
Posts: 38
Likes: 0
From: Charleroi PA
Right now i get about 250 miles to a tank of gas (or 13-15 mpg) i have a cap i can put on so ill put the cap on and see how far i can run on a tank of gas then ill try with a tonneau cover and ill post the results on here. thanks again.