Q: Leaking coolant and poor gas mileage.

asked by on

My vehicle is getting poor gas mileage. It is only getting 8-10 mpg when it normally gets 17. The truck is also leaking coolant even though I do not see any visible leaks.

Some key things to check to ensure your vehicle gets correct gas mileage would be your air filter, fuel filter, quality of fuel, and oxygen sensor integrity. A dirty air filter will suffocate your engine causing bad gas mileage. Dirty fuel entering the engine caused by a dirty fuel filter will cause the engine not to produce as much power thus travel less miles in exchange for the same amount of fuel. The same goes for bad gas itself. If your oxygen sensors are malfunctioning this can cause your engine to run rich and thus decrease your fuel mileage. I would recommend having a professional come to inspect your vehicle to see which of these is at fault.

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. Leaking coolant and poor gas mileage.

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: Iac valve

Danny. We appreciate you contacting us and asking questions - but this issue with your Dakota is something that we really can't "guess" at what might be normal or is wrong with your Dakota. Any responsible mechanic would insist on...

Q: What if I dont have power to the acc relay how do I fix it do

Hi there. It really depends as to what is causing the accessory relay to not receive power as to what is the best solution. If the relay is not properly grounded, the repair is to resolve the ground issue. If...

Q: Car temperature gets hot and makes a thumping noise.

Hello. If the engine is using coolant like this then there is a serious issue. I usually do a pressure test of the cooling system first to make sure that there are no leaks. If there are no external leaks...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...