Sure, you can use premium gas in your Elantra, but why would you? Compared to regular gas, you will receive no discernible benefit in fuel economy or performance by pumping a higher-octane, more-expensive premium blend that costs 20 to 25 cents more per gallon. The only likely benefit is that premium could eliminate engine knock (or “ping”), so if you aren’t experiencing engine knock, don’t bother.
The Elantra’s 1.8-liter four-cylinder engine is designed to run on 87-octane regular gas, and Hyundai advises that is the right fuel for optimum mileage and performance. Spending more on premium gas get you to your destinations any faster.
You can find more information on which grade of gas is best for your vehicle in the Cars.com Advice section, here.
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