This post originally appeared on All You.
Thinking about taking a road trip over Memorial Day weekend? Now might be the perfect time. According to recent reporting in Fortune, summer gas prices could be the lowest they’ve been since 2009. And you can whittle those fuel costs even further by following a few simple tips:
Give your car a once-over
Before leaving, check the tire pressure, oil level and air filter. Vehicles with properly inflated tires get up to 3.3% better mileage, while those with clean air filters can see a boost of 14%. Even replacing your gas cap can help you save: Loose, missing or damaged caps allow 147 million gallons of fuel to evaporate each year, the Car Care Council says.
Fill up wisely
Gas prices vary widely from state to state (and sometimes from one side of town to the other). Download the free GasBuddy app, which pulls up current fuel prices at stations close to you, wherever you are, based on submissions from more than 23 million drivers.
Cool off efficiently
When you’re going less than 40 miles per hour, roll down the windows to beat the heat. Once you surpass that speed, however, close the windows and turn on the air conditioning to stay comfortable. The wind drag that starts at 40 mph burns more fuel than you use running the AC.
As a rule of thumb, expect to pay an extra 20 cents per gallon of gas for every 5 miles per hour you drive over 60.
Download Waze, a free app that lets drivers in your area share real-time traffic and road conditions, helping you avoid jams that burn gas while your car idles.
Want to estimate how much you’ll spend on gas during your trip? Use the fuel cost calculator at roadtripamerica.com.