Why Is My Gas Mileage So Bad? Causes and Fixes for Redding Drivers
Stop Losing Money at the Pump
A noticeable drop in mileage usually has a fixable cause, like a failing sensor, worn plugs, or a clogged filter. We find it so you're not paying for it every fill-up.
Safe to drive, it's just costing you money. A sudden drop with a check engine light or rough running: book soon.
Why is my gas mileage so bad? Something is making the engine work harder or burn more fuel than it should. Common causes are worn spark plugs, a failing oxygen sensor, a clogged air filter, dirty fuel injectors, low tire pressure, bad alignment, or a dragging brake.
If you're filling up more often without changing how you drive, something is making your engine work harder or burn more fuel than it should.
Common causes of poor gas mileage
- Worn spark plugs or ignition parts. Incomplete burning wastes fuel. Tune-up service
- A failing oxygen sensor. It can make the engine run rich and often turns on the check engine light.
- A clogged engine air filter. Engine air filter replacement
- Dirty fuel injectors. Fuel system service
- Low tire pressure or bad alignment. Both add drag. Wheel alignment
- Dragging brakes. A sticking caliper makes the engine push against the brakes.
Filling up more often?
Book a tune-up and diagnosis and stop paying for wasted fuel.
How we find the cause and fix it
- We scan for codes and check sensor readings.
- We inspect plugs, filters, and the fuel system.
- We check tire pressure, alignment, and for dragging brakes.
- You get an estimate before we fix anything.
Get your mileage back.
Book a fuel economy check with an estimate before any work.
Is it safe to keep driving?
Yes, but it's costing you money every tank. If the drop is sudden, or comes with a check engine light or rough running, book soon. See also rough idle or misfire.
Services we offer that could fix your problem
We confirm the cause first, then recommend only the repair you need.
- Tune UpBring Back the Power and Efficiency Your Engine LostLearn more
- Fuel System ServiceFix Hesitation and Poor Mileage Caused by Clogged Fuel PartsLearn more
- Engine Filter ReplacementLet Your Engine Breathe Easy and Run More EfficientlyLearn more
- Wheel AlignmentStop Pulling and Uneven Tire Wear With a Precision AlignmentLearn more
Common questions
Why Is My Gas Mileage So Bad?
Something is making the engine work harder or burn more fuel than it should. Common causes are worn spark plugs, a failing oxygen sensor, a clogged air filter, dirty fuel injectors, low tire pressure, bad alignment, or a dragging brake.
Why has my gas mileage suddenly dropped?
Common causes are a failing oxygen sensor, worn spark plugs, a clogged air filter, low tire pressure, or a dragging brake.
Will a tune-up improve gas mileage?
Often, if worn plugs or a dirty filter are the cause. We test first to find what's actually wrong.
Does tire pressure affect fuel economy?
Yes. Underinflated tires add rolling resistance. Check pressure monthly, especially as temperatures change.