Loss of gas mileage
#1
Alright I usually get about 260 or so miles to the tank. My gauge can usually go about 60-70 miles between each quarter on the tank. For the last few weeks I have been getting about 200-210 miles to the tank. I got that before I put the 32's on. I drove home to DE and I got the normal mileage, but when I drive around to work and everything, my mileage has been sucking. The bad mileage started when the Gas light came on and I filled up with 14.4 gallons, when I usually only put 12.2 when its empty. Do you think all that gas could have contaminated something? I have put fuel injector cleaner, gas treatment, everything and nothing works. What can I do? Yes it is still under warranty.
It got that mileage even before the lift. Plus i hope I wouldn't lose 50 miles because I am a little taller.
I got the bad gas or so I thought the week before the lift, drove home with normal gas mileage to DE and then get bad mileage once I get back down here again.
It got that mileage even before the lift. Plus i hope I wouldn't lose 50 miles because I am a little taller.
I got the bad gas or so I thought the week before the lift, drove home with normal gas mileage to DE and then get bad mileage once I get back down here again.
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Also don't forget that when you put that body lift on you left your battery unhooked long enough for the ECM to forget all of the previous settings so it is probably still trying to tune the mixtures back to optimal. Also having just the lift and tires will drastically change your perception because I have a 3" body lift w/ 33" BFG A/T's and every 100 miles the odometer registers is actually 120 miles. If you do highway driving note the odometer at a significant mile marker XX0, X25. X50, etc....and see just how far you are really going....
#10
I don't know about that ZetaOmegaRanger, my odometer is reading 103 right now and its at half a tank, and I usually get 175 at half a tank with the 29s or 31s I had..I have 33s now and off by about 72 miles now...I don't floor it at all...I just have to get it recalibrated soon, and one of my buddies at a place is going to let me know if they can do the speedo for me soon..I didn't think that it would be off by that much...
#11
Originally Posted by ZetaOmegaRanger
Also having just the lift and tires will drastically change your perception because I have a 3" body lift w/ 33" BFG A/T's and every 100 miles the odometer registers is actually 120 miles.
To the original poster: Are you calculating the mileage/ odometer offset correctly? How many miles are on your truck? Air filter clogged? Fuel filter need replacing?
#13
It only has 31k miles. The air filter is clean, just cleaned it. I have no idea if I need to replace the fuel filter. I want to take it to Ford, but I don't want them bitching about the lift and all.
I went from 245's to 265's. I used to hit around 160-170 at the half tank mark and now it might hit 100-110. I know my speedo is off by atleast 3 mph, because my buddy in his new gmc paced me when we were coming back from home. It only driving around town that it suffers really bad, I got 21 mpg when I went home last weekend(400 miles) and I usually get around 20mpg around town, but now its down to 17-17.5 mpg.
I am getting my speedo fixed when I send it to Apten in a week.
I went from 245's to 265's. I used to hit around 160-170 at the half tank mark and now it might hit 100-110. I know my speedo is off by atleast 3 mph, because my buddy in his new gmc paced me when we were coming back from home. It only driving around town that it suffers really bad, I got 21 mpg when I went home last weekend(400 miles) and I usually get around 20mpg around town, but now its down to 17-17.5 mpg.
I am getting my speedo fixed when I send it to Apten in a week.
#14
Well I just got my speedo recalibrated and it wasn't off hardly at all.
Speedo-Actual:
25-23.5
35-34.5
45-44.5
55-56.9
65-67.5
The guy at the dealership said that the mileage could be off that much b/c of the larger tires. But I only went up one tire size, how in the world could I lose almost 4 mpg. Still confuses me because I got 21 mpg on the 400 mile drive home and back with the 32's.
Speedo-Actual:
25-23.5
35-34.5
45-44.5
55-56.9
65-67.5
The guy at the dealership said that the mileage could be off that much b/c of the larger tires. But I only went up one tire size, how in the world could I lose almost 4 mpg. Still confuses me because I got 21 mpg on the 400 mile drive home and back with the 32's.
#15
Ford recommends changing the fuel filter at 30k, but I don't think one thousand miles over is going to make a big deal, unless you got some really bad gas from somewhere.
Dealerships don't usually give a rip about aftermarket stuff, unless you are trying to get warranty work done on a part damaged by the equipment. A fuel-filter replacement isn't going to be covered under warranty, as it is a "wear-n-tear" item like brake pads.
What gears are in your truck? That may make a huge difference.
EDIT I just saw in your sig you are running 4.10s. Your highway mileage should actually increase, so that is not it.
Dealerships don't usually give a rip about aftermarket stuff, unless you are trying to get warranty work done on a part damaged by the equipment. A fuel-filter replacement isn't going to be covered under warranty, as it is a "wear-n-tear" item like brake pads.
What gears are in your truck? That may make a huge difference.
EDIT I just saw in your sig you are running 4.10s. Your highway mileage should actually increase, so that is not it.
#16
I might have gotten some bad gas, or put too much fuel in the tank when I somehow put 2 more gallons than usual in the tank. How much does a fuel filter run and how hard is it to change?
I was looking at my service manual dvd and it looked really easy except for the releasing the pressure in the system.
I was looking at my service manual dvd and it looked really easy except for the releasing the pressure in the system.
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Originally Posted by Pinecone
I might have gotten some bad gas, or put too much fuel in the tank when I somehow put 2 more gallons than usual in the tank. How much does a fuel filter run and how hard is it to change?
I was looking at my service manual dvd and it looked really easy except for the releasing the pressure in the system.
I was looking at my service manual dvd and it looked really easy except for the releasing the pressure in the system.
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Everyone seems to forget that with bigger tires, you're actually going further than your odometer reads.
when I went up from the stock 28" tires to 32" tires, I did the math, and basically I'm going 1.1 miles for every mile the odometer reads, so when I stop to calculate my gas mileage, first I multiply the mileage on the trip tick by 1.1, then divide by the gallons I used.
Really its pretty good being non-corrected... I know how fast I'm really going, so the speedo doesn't bother me, and I'm putting about 10% more miles on the truck than the odometer shows. So basically running 32"s uncorrected is getting me 10% more warranty miles. :)
when I went up from the stock 28" tires to 32" tires, I did the math, and basically I'm going 1.1 miles for every mile the odometer reads, so when I stop to calculate my gas mileage, first I multiply the mileage on the trip tick by 1.1, then divide by the gallons I used.
Really its pretty good being non-corrected... I know how fast I'm really going, so the speedo doesn't bother me, and I'm putting about 10% more miles on the truck than the odometer shows. So basically running 32"s uncorrected is getting me 10% more warranty miles. :)