There aren’t engine cleaning benefits, and pricey gas usually doesn’t mean a longer-lasting engine. It’s a false idea pushed by the oil industry. Start with your manual. If premium fuel isn’t called for, you will never need it. If the requirement isn’t there, avoid premium and save money.

When auto engines aren’t designed for premium gasoline, they never need the higher-octane fuel. It has to do with how the fuel is ignited. Premium gas ignites at a higher temperature, so it can withstand high levels of compression without reigniting. Pricier fuel also has less heptanes, which also makes it less likely to ignite at low temperatures. Even the FTC agrees – there’s no reason for it in the average tank.

In cases where the owner’s manual does call for premium gasoline, chances are you don’t always need it. This is especially true for autos built since 1996 because your engine will make up for any octane differences. With premium-designed engines that are meant for premium gasoline, the lower ignition rate can mean better performance. The premium unleaded gasoline also prevents pinging or knocking noise. However, if you’re not going for top performance, the difference in performance is minor but the price is much higher. If your engine is knocking with normal use, it’s a different tale. For these vehicles, experiment or talk to one of our ACE-certified mechanics about using the right gasoline.

Is There a Diesel vs. Gasoline Difference?

While it’s not usually wise to use premium gas over regular never try diesel in a gas engine. If you drive a diesel, filling the tank with gasoline will cause it to stop working entirely. You’ll need a complete flush. Diesel is a little grimier and much thicker than gasoline, and gasoline engines are different in many ways. Cars designed for diesel don’t have spark plugs. Instead, the fuel is injected directly and ignited by heat. With regular gas, air and fuel are combined first and then the spark plugs do their work.

Call Christian Brothers in Apex, NC Anytime

If you have concerns about how to fill your gas tank or if you’re having any problems with your fuel system, give our trusted technicians in Apex, NC a ring. We can help with everything from looking at automobiles you’re considering purchasing to tune-ups and repairs.