Q: with a 14.5 gal tank, i'm getting about 240 miles, what?????

asked by on

how do i get better gas mileage out of this 4 cyl 5 speed?

My car has 128000 miles.
My car has a manual transmission.

Your vehicle is EPA rated at 23 MPG in city driving and 30 MPG in highway driving. You have stated that you are able to travel 240 miles and your tank capacity is 14.5 gallons. Assuming that you refill the tank after using 12.5 gallons, that means you are presently getting around 19 MPG or 17% less MPG than the EPA city rating. Your fuel economy expectations have to be weighed against actual driving conditions. If the 240 miles you travel are made up of short, less than 5 mile trips, in city driving, when the weather is cold, you may not be underperforming the rated efficiency of the car and, if you "are", it is not by much. However, if the 240 miles is driven non stop on a highway at 60-65 MPH (fuel economy drops precipitously above 60 MPH) then 19 MPG would represent very poor fuel economy, as much as 30% less than the EPA rated efficiency for highway driving. So, you have to judge your present results, the 19 MPG, based on your driving conditions. Once you have made that judgement, if you determine that the efficiency you are getting is well below the EPA rating for the conditions you operate in, common causes of reduced efficiency are low tire pressure, poor alignment, dragging brakes, unperformed vehicle maintenance such as spark plugs, air filter and so forth, overly rich mixture due to O2 sensor faults and/or engine coolant temperature sensor faults, leaking fuel injectors, wrong ignition timing, low engine compression and misfires, stuck open cooling system thermostat, exhaust restrictions, and so forth. If you want all of the possible causes evaluated for a possible resolution of this problem, the recommended service is poor gas mileage diagnostic during which the responding certified mechanic will simply methodically go through all the causes to see which apply in your case. It is typical to find multiple causes by the way, for example perhaps underinflated tires and worn spark plugs. In any event all the many possibilities have to be considered, in turn, in an organized way.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. with a 14.5 gal tank, i'm getting about 240 miles, what?????

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a bad knock sensor. Is it worth replacing?

Hello. Yes, you are correct - the P0325 is indicative of a failed knock sensor (or the knock sensor wiring). I think it is a rare circumstance where you would not want to make this repair. It is straightforward and...

Q: Bad gas in tank of 1994 Pontiac Bonneville

The first thing I would check would be for codes on the computer. If there are no codes present you could have a clogged catalytic converter. This is where the honeycomb inside the catalytic converter becomes so clogged that it...

Q: Noise when I accelerate and turn right.

Hi there, It sounds like you have a failing constant velocity (CV) joint on one of the front axle shafts. When CV joints fail, they often make a loud clicking or grinding type noise, which could be interpreted as a...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.