Very low gas mileage in C240

is this calculated mileage or what the estimated mileage is showing on the dash. Have you checked to see what you get on just the freeway?

What are your driving habits like?

How is your tire pressure?

Do you make a lot of short trips?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The Fuel Economy of the 2004 Hyundai Santa Fe is listed as being 16 mpg in the city and 22 mpg on the highway.----------------------------------------------------------------------------------
Digiprog3 Odometer Correction Tool

I don't think it's a part of any regular scheduled maintenance changes, but an intriguing question. I think their average lifetime could be in years as well as mileage. On average I would guess we are increasing miles driven per year. I can tell you the main thing that shortens pump life is overheating from chronically low gas tank levels. In tank pumps require being surrounded by gasoline for cooling purposes. The guy who often runs out of gas, and cranks and cranks the car over, is killing his fuel pump in short order. I would hazard a guess that normal pump life is maybe around 150,000 miles? But I am sure there will be some in the "if it ain't broke, don't fix it" mode. I myself adhere to that pretty often, lol.

A MAF can also be set if you have a partial plugged catalytic, or a stetch chain ,a stretch chain I would doubt,But a pulgged catalytic yes,As for the thermostat yes it can wake the 02 sensor when a vehicle is not at operating temperature your system goes in open loop,which ignores the 02,As for the torque convertor clutch you would have a code for it not a MAF code, and by the way a leaky fuel pressure regulator can cause your problem also

Make sure the air filter is clean. Have a diagnostic scan done to the engine to see if there are any trouble codes or issues that would reduce your gas mileage. You are getting around 11 or 12 miles to the gallon, which isn't very good. But, judging by the low amount of miles on the car, you apparently do all your driving in traffic, and short distances with a lot of stop and go. If you let the engine warm up for long periods of time, especially in cold weather, that will drop your mileage considerably. Letting a car warm up for 10 or 15 minutes in the winter gets you 0 miles per gallon for that amount of time. Add all these factors up, and figure in the poor quality of today's fuel, 12 miles per gallon is not too far off from what you should be getting. If you have the v6 engine, your mileage was probably around 15mpg when the car was new. Now if you were to take your car on a road trip where you could drive a long distance with the cruise control set on 65mph, you would probably get around 18mpg.

Cause you're driving a bus. lol. Mileage will vary depending on what fuel you use, how you drive, and where you're located. typically what i've seen on trucks like yours, i'm asuming it's a 6.0 liter, is anywhere from 12-19 mpg. you should see around 15mpg for the most part. if you do a lot of in town driving, expect a lot less. @9-12. if it's less than that, i'd start lokking in to it. try running a K&N air filter and use synthetic engine oil. I've seen noticeable improvements with power and mpg's with that. Also, ensure that your tires are properly inflated as that can make a difference in mileage. use the recomended fuel octane and change fuel filters.

Have someone retime the engine. In a diesel it means to time the injection pump. You may have wear in the timing chain or gears. But the fuel ratio can be made rich or lean by when the fuel hits the cylinder.

Try that first as it is cheaper. You can have worn injectors and adding a cleaner will make the fuel run through faster. Possibly spray a little better, but it will not make the fuel nozzles any tighter.

Depends on a lot of factors:

1. Gas mileage of your vehicle. If you get excellent gas mileage, 50 MPG +, you can go quite a way. But with a 98 GMC Jimmy, you're probably getting 19 MPG at the best.

2. How you drive your vehicle. The gas mileage means nothing if you are street racing and redlining your vehicle through every gear with the low fuel light on. You definitely won't make it very far like that!

3. The make and model of vehicle. There is no set national standard for when the low fuel light illuminates on a vehicle, so they vary greatly anywhere from half a gallon remaining to 2 gallons remaining. In newer vehicles, the ECU actually takes into account how you drive the vehicle and what speeds you typically go as to when to turn on the low fuel light.

For your specific application, I would say it comes on when you have roughly 1 to 2 gallons left which means that as long as you are driving in a fuel conserving manner you can probably make it about 30 miles or so before you'll be running on fumes. But that should be plenty of time to find a gas station right?!

Hope this helps!

change your spark plugs if they haven't been changed in awhile. check your tires for the propper psi there should be a sticker on the inside of your drivers door that will tell you recomended air pressures go by this not the recomendations on the tires. also where are you getting you gas does it contain ethanol sometimes this can burn faster.

I have only owned the car for 4 months, the only thing that bothers me is poor gas mileage. I am only averaging about 13 miles per gallon in mixed driving.