As gasoline prices fluctuate, remember this next time you’re at the pump: not all gasoline is created equal, and where you fill up will affect your wallet and the performance of your engine.

The octane number is also not taken into account.

Consumer Reports tells you what type of gasoline to look for and how to get the most out of each tank of gas and save money.

Whether you’re taking a summer road trip, commuting to work, or just running errands, you want your car to be up to date.

According to auto experts at Consumer Reports, it all starts at the gas pump.

When choosing a gas station, CR recommends using top-tier gasoline.

Jeff Bartlett works in Consumer Reports’ Auto Test Center, where more than fifty cars, trucks and SUVs are purchased, tested and rated each year.

So CR consumes a lot of gas.

Top Tier gasoline is held to a higher standard due to a voluntary agreement between the major gasoline brands. You can find it at Exxon, Mobil, Chevron, Shell and Costco stations.

AAA analyzed top-tier gasoline and found that it better protects newer engines from carbon buildup and intake valve deposits. What does that mean for you? Better performance and fuel economy.

When a brand offers Top Tier, it does so for all grades and octane levels, not just specific versions. Top Tier gasoline may cost a little more than discount brand fuel, but research shows it’s a smart investment.

To save money, take a look at your owner’s manual: skip it unless premium fuel is required.

Here are a few more rules to get the most out of your tank: Stick to half or more. When driving, make sure your gas tank is half full. You never know when you’ll encounter congested roads or slow-moving traffic.

Check prices online. Apps and websites like GasBuddy display local gas prices, making it easy to find the best prices in your area or if you need to travel.

In addition, prices tend to be cheaper at petrol stations away from main roads and city centres, as well as in hypermarkets and some large travel centres.

Finally, obey speed limits and drive slowly. Your driving habits can significantly affect your gas mileage, which in turn costs you money.

Remember to check your tire pressure. Tires with lower pressure than the pressure recommended on your door jamb sticker can affect performance, tire life, and fuel economy, as well as pose a safety hazard.