11 Reasons for Poor Gas Mileage

11 Reasons for Poor Gas Mileage
With more and more vehicles on the road reaching high-mileage milestones, some people may be left asking “ Why is my car gas mileage getting worse ? ” After the first base 100,000 miles, what started as an EPA-rated 28 MPG car might end up being more like a 20 MPG car — or worse ! The loss in fuel efficiency can not alone drain your gas tank faster but your wallet excessively .
If you ’ ve noticed your flatulence mileage getting worse as your car ages, there are many things you can do to both save on gas and boost your vehicle ’ s overall fuel efficiency. Read on to understand why fuel economy drops as cars age and, more importantly, what you can do to help keep your vehicle running smoothly for many miles to come .

11 Reasons Why Your Car’s Gas Mileage Is Getting Worse 

It seems like common sense that, as a car gets older, it tends to get worse and worse gas mileage. In reality, it ’ s more accurate to say that ill maintained cars are more probably to have worsening boast mileage over time. In fact, drivers who stick to their manufacturer ‘s care schedule are typically less probably to see any major dips in fuel economy over the animation of their car .
One of the most simple solutions to keeping gas mileage up is staying on exceed of act alimony. even, with then many parts to account for arsenic your car reaches 100,000 or even 200,000 miles, keeping up with fuel-saving alimony can be catchy — specially when you consider how other factors like blistering weather can besides affect fuel efficiency.

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What should you look out for to make sure your car keeps chugging along like the sidereal day you bought it ? Start by addressing the common problem areas listed below .

1. Clogged or Damaged Fuel Injectors

One of the most common culprits for a drop in fuel efficiency is dirty fuel injectors. fuel injectors are the nozzles that spray fuel into each engine cylinder. A fuel injector ’ sulfur spray design must be very accurate to properly mix with air and erupt inside the engine .
When a fuel injector becomes dirty or clogged, it may spray fuel inefficiently, intend of a ailing pressurized shower head. This can promptly reduce the efficiency of your engine and lower fuel economy. In many cases, the fuel injector nozzles can be cleaned. other times, the injectors may need replacing if internal price is causing a bad spray model .

2. Old Engine Air Filter

Engines must suck in air to office vehicles. If your locomotive air out percolate is particularly dirty or clogged, your locomotive won ’ triiodothyronine be able to “ breathe. ” To compensate, the older engines would burn more fuel to travel at the same speed. Newer engines may perform more ailing trying to compensate for a clogged vent filter .
This problem is particularly common among older cars that rely on carburetors. Engine breeze filters should be replaced approximately every 15,000 to 30,000 miles, but check your owner ’ second manual to be sure or have it inspected at your following petroleum change .

3. Dirty Oxygen Sensor

Whereas many older cars use carburetors to ensure the engine receives the proper ratio of air-to-fuel for combustion, all newer cars since about 1996 use oxygen sensors alternatively. An O2 detector measures how rich or lean the exhaust gases are that passing your engine and sends a message to your car ’ s computer to adjust how much fuel enters the engine .
A dirty oxygen detector may lead to incorrect measurements that cause your engine to burn excessively much fuel, lowering efficiency by american samoa much as 40 % according to Edmunds .
Faulty oxygen sensors are one of the most common causes of a check engine light and will probably need inspecting and possibly replacing before the 100,000-mile scratch. thankfully, O2 sensors are relatively low-cost to replace, helping you save on boast and keep your fomite ’ mho emissions in determine .

4. Clogged Fuel Filter

fuel filters block contaminants in the fuel from traveling throughout the locomotive where they could damage fuel injectors and other important parts. A clog fuel filter can lower fuel pressure and cause your engine to run ill .
For older cars specially, it ’ second important that fuel filters get changed approximately every two years or every 30,000 miles. If you suspect a dirty fuel percolate to be the induce of your decreased natural gas mileage, bring your car into your local Firestone Complete Auto Care for a fuel pressure test .

5. Worn Out Piston Rings

The piston rings in your engine cylinders form a seal against the cylinder walls to create compaction. When piston rings become wear out, they aren ’ deoxythymidine monophosphate able to create that seal and the locomotive loses pressure. As a result, fuel efficiency goes out the window.

Engine anoint not alone helps lubricate the piston rings, it besides contributes to fuel efficiency. The best solution is to make surely your car has regular oil changes with the manufacturer-recommended oil type found in your owner ’ s manual .

6. Bad Ignition System Parts

The ignition organization includes coils, spark plugs, and wires that are responsible for combusting the air-fuel mix in the engine. If any of these parts are malfunctioning, it may be causing the engine to misfire. A miss occurs when the fuel in an engine cylinder does not combust. Since unburnt fuel can not office your vehicle, this ends up wasting gasoline and lowering your fuel economy .
You may experience rough idle, stumbling, or an overall decrease in power from the locomotive if the ignition system is to blame. The most common perpetrator inside a failing ignition system is the sparkle chew .

7. Old or Incorrect Engine Oil

There ’ south a coarse myth that older cars should use thick engine anoint to prevent leaks. The intend goes that since internal seals and gaskets become brittle and shrink with age, slurred oil would be less probable to seep through the cracks .
specially formulated “ high mileage locomotive oils ” can do this by using seal conditioning additives to help older seals become more flexible and do a better speculate sealing. In summation, the viscosity is slenderly increased to help worn piston rings seal better. however, thicker oil actually creates more electric resistance between engine parts, which lowers fuel efficiency .
The right motive oil is essential to keeping mod engines lubricated and protected. The best thing you can do to keep your car ’ mho gas mileage up is to perform regular oil changes with the type of anoint specified in your owner ’ south manual of arms. high mileage engine oils may help reduce oil leak and anoint consumption but it will take away some of the electric potential fuel efficiency .

8. Dirty Mass Airflow Sensor

Mass airflow sensors measure the amount of tune flowing into the engine. Like an oxygen detector, the bulk airflow detector sends data to the onboard computer to calculate the correct air-to-fuel proportion in the engine and the computer adjusts fuel injection consequently. however, a dirty airflow detector will cause the car ’ s calculator to miscalculate the proper air-fuel concoction, leading to decreased fuel efficiency or even engine stall. Mass airflow sensors should be cleaned with a extra clean spray .

9. Underinflated Tires

low-pressure tires are a coarse induce of worsening MPG because an underinflated tire has increased rolling resistance with the road and a slightly smaller effective diameter. modern cars come with a tire imperativeness monitor system ( TPMS ) to notify drivers when their tires need more pressure, but the warn is only triggered after a significant loss of PSI. even running five PSI below recommend imperativeness is adequate to create drag and lower fuel economy even if the TPMS doesn ’ metric ton yet display a warn .
One of the easiest things you can do to keep up fuel efficiency is to regularly check your tire pressure and top-up with air travel as needed. Another smart option is to use Bridgestone Ecopia tires, which are made with fuel economy in mind. Ecopia tires feature a low rolling resistance tread designed to help you save both money and fuel with fewer trips to the accelerator pump. While it ’ sulfur best to pair Ecopia tires with early gas-saving sustenance, the fact is fuel-efficient tires go a long way towards a green, more cost-efficient ride .

10. Worn or Stuck Brakes

not only is it dangerous to drive with raddled bracken parts, but muggy brakes could besides be causing your MPG to plummet. A adhere caliper or awkward brake pads, for example, create resistance to your fomite ’ s fore motion. Brake drag means your engine must constantly fight with the brakes just to move, causing fuel efficiency to drop dramatically. Be certain to check your brakes regularly — or merely bring your car into Firestone for a comprehensive brake inspection.

11. Poor Alignment

If you ’ ve been driving for a while with a steering roulette wheel that doesn ’ thymine sit down straight, chances are your bicycle conjunction is costing you money at the pump. Just like with low-pressure tires, misaligned wheels create electric resistance to traveling straight down the road. constantly fighting this underground requires more attempt from the engine and hurts fuel economy. fortunately, wheel realignment is a elementary fix that can be done at any Firestone Complete Auto Care placement near you .

Get the Most Out of Your Gas Mileage

Whether your car needs new tires or a modern fuel percolate, your local Firestone Complete Auto Care technician can get to the bottom of your fuel problems and make things right. Make an date today !

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Category : Car Brakes