Gas is expensive, especially when you put a lot of mileage on your car. At Harley Swain Subaru, we're here to do more than introduce you to the latest and greatest models. We also want to help you achieve the best possible gas mileage.

Get Your Oil Changed Regularly

Getting your oil changed is a critical component of preventative maintenance. It ensures that the oil that cycles through the engine is clean on a regular basis. Otherwise, you end up with a significant amount of sludge. The dirt and contaminants will affect engine performance. This, in turn, will affect the fuel efficiency of the engine.

As for how often you should get your oil changed, that is dependent on the recommendations for your model and the number of miles you're driving regularly.

Change the Engine Air Filter

Your engine uses a ratio of air and fuel to create internal combustion within the engine. Changing out the engine air filter periodically ensures that you've got clean air for that formula. If the filter is clogged, you may not be getting enough air. Further, the air that does get through may be dirty, affecting how much fuel is used. You don't want to get into a situation where more fuel is being used, especially if it's as simple as changing out a filter.

Check the Seal on the Gas Cap

The gas that sits in your tank should remain pure. If too much air gets into the tank, it can cause your engine to burn more gas than it should. The rubber seal on your gas cap has a finite lifespan. Over time, it's going to break down.

Check the integrity of the seal from time to time. If it looks worn or stretched out, be sure you replace it. You'll notice how it can help your fuel efficiency almost immediately.

Adapt to Using Cruise Control

Cruise control allows you to follow a speed that is fuel efficient. It ensures that you're not accelerating or braking too heavily, too. If you suddenly step on the gas or hit the brakes hard, it can use up significantly more gas.

Rather than trying to match the speed of the car in front of you, set your cruise control to the posted speed limit. If you have adaptive cruise control in your vehicle, that will only help you. It ensures that you're not too aggressive on the roads, and it will save you at the pump.

Don't Speed

Just as you want to set the cruise control, you also need to watch your speed. If you tend to become lead-footed, you will never get the fuel efficiency that was promised when you bought a car. The reason is because you're using too much gas to get to where you want to be in a hurry.

Especially if you're going 10 mph or more than what the speed should be, you're using more gas. Your foot is likely pressed to the gas pedal to the point that you're revving those RPMs regularly. Slow down and watch how it can add up.

Reduce the Weight in Your Car

Too much weight in your car can actually cause you to waste more gas. Often, we put things in our trunk or in the back without thinking too much of it. One or two trips won't cost you too much. However, if you keep all of that weight in on a regular basis, it can add up significantly over time.

Take a good look at what you need. Drop off the donations, avoid carrying around too much work stuff, and don't let landscaping materials stay around for too long. Empty out your car and see how much better it runs.

Inflate Your Tires Properly

Having a good tire gage can be a great way to keep your tires properly inflated. Check what the recommended PSI is for your tires and keep them at that PSI. If your tires are under-inflated, it can reduce your mileage. Why? Your car needs to use more gas to get it rolling properly. Traction matters for a number of reasons.

When you follow these tips, you may be surprised by not only the fuel efficiency of your car but also how much better it runs.

Harley Swain Subaru

1915 N 1st Street
Directions Hermiston, OR 97838

  • Sales: 541-567-9696
  • Service: 541-567-9696
  • Parts: 541-567-9696


  • Monday 09:00am - 06:00pm
  • Tuesday 09:00am - 06:00pm
  • Wednesday 09:00am - 06:00pm
  • Thursday 09:00am - 06:00pm
  • Friday 09:00am - 06:00pm
  • Saturday 09:00am - 06:00pm
  • Sunday 11:00am - 4:00pm