Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-33384-10aqojzjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-33384-10aqojzjs:47:15602)
    at /tmp/execjs20161208-33384-10aqojzjs:49:31860
    at a.r.perform (/tmp/execjs20161208-33384-10aqojzjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-33384-10aqojzjs:49:31821)
    at r (/tmp/execjs20161208-33384-10aqojzjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-33384-10aqojzjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-33384-10aqojzjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-33384-10aqojzjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-33384-10aqojzjs:173:8

Q: Fuel mileage is worse than advertised

asked by on

At only 30,000 miles, I'm noticing that my 2011 Hyundai Elantra is not getting the kind of fuel economy which Hyundai promised in the information given to me before buying this car. The dealership has offered to reimburse me a small amount via a debit card for fuel, but I just want the good fuel economy I was promised! Is there anything I can do to improve the mileage my car gets? My commute is very far and paying for all this gas is hitting me financially hard.

A: Fuel economy has many influences on it whic...

Fuel economy has many influences on it which can raise or lower the MPG. Are you calculating the fuel economy figure per tank or off the trip computer? The trip computer is a constant average that might be resettable (see owner manual). If so, reset it on your next long highway trip to see what it reads. When you are idling for any period of time, this will cause a drop in fuel economy. Fuel economy will also be reduced by speed, acceleration, poor tire psi and condition, the load inside the car, weather, and terrain. For example, driving 20 miles to work up a hill and never getting above 30 MPH will lower fuel economy. Highway mileage, in theory, means cruising at 60 MPH and during that time you will be close to what the rated MPG is. The EPA Fuel economy is measured under controlled conditions in a laboratory using a standardized test procedure specified by federal law. Manufacturers test their own vehicles—usually pre-production prototypes—and report the results to EPA. EPA reviews the results and confirms about 10%–15% of them through their own tests at the National Vehicles and Fuel Emissions Laboratory.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Clock not working

The clock fuse would need to be checked first. If that is okay, then the clock should be checked to make sure that it has a proper supply of power and grounds. If that is okay, then a replacement clock...

Q: Vehicle hard starting & fuel economy issue.

Check for proper fuel pressure - both while the vehicle is running, and after running. I suspect you will find that fuel pressure is not being maintained in the pressurized portion of the system due to a fuel pressure regulator...

Q: How do I unlock the car with the keys?

Your vehicle can be manually unlocked with the keys. To do so, simply insert the key into either front door lock, and rotate the key clockwise until you hear the doors unlocked. If you are using the passenger’s door, then...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.