Owner guide · Chicago Northside Toyota

Premium vs. Regular Gasoline: What Your Toyota Actually Needs

Nearly every Toyota on the road is designed for 87-octane regular. A few GR performance models require premium. Paying for 93 in a Camry or RAV4 buys nothing, and AAA has measured it. Here is what octane does, who needs it and what matters more.

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Quick answer

Use the octane your owner's manual specifies. Most Toyotas, including every Camry, Corolla, RAV4, Highlander, Tacoma, Tundra and all the hybrids, call for 87-octane regular, and Toyota's own support guidance is that a higher octane than recommended does not improve fuel economy in normal driving. The GR Supra and GR86 require premium (91 or higher) and the GR Corolla calls for it too. AAA's lab testing found no gain in horsepower, fuel economy or emissions from premium in cars designed for regular. What does help any engine is a TOP TIER detergent gasoline, which Toyota recommends in its manuals.

What octane is

The number on the pump is the anti-knock index, an average of two lab octane ratings. It describes how well the fuel resists igniting early under pressure, which an engine hears as knock or ping. High-compression and turbocharged engines squeeze the mixture harder, so they need more resistance. Octane says nothing about energy content; premium does not have more power in it, and it is not cleaner unless it also carries a better detergent package.

What the numbers on the pump mean Regular 87 octane (AKI) most Toyotas Mid-grade 89 octane (AKI) rarely specified Premium 91 to 93 octane (AKI) GR Supra, GR86, GR Corolla Higher octane resists knock in high-compression or turbocharged engines. It does not add energy or clean better.
Octane is the anti-knock index posted on the pump. An engine designed for 87 gains nothing from 93; an engine that requires 91 can lose power, or worse, on 87.

Which Toyotas need premium

ModelFuelWhy
Camry, Corolla, Prius, Crown (2.5L hybrid), RAV4, Highlander, Grand Highlander, Sienna, Sequoia, Tacoma, Tundra, 4Runner, Land Cruiser 87 regular Engines and hybrid systems tuned for regular; no gain from higher octane
GR Supra91 or higher, requiredTurbocharged BMW-sourced engines tuned for premium
GR8691 or higher, required High-compression 2.4L boxer; Toyota says using lower octane can cause knock and damage
GR Corolla91 or higherTurbocharged 1.6L three-cylinder tuned for premium
Crown Platinum, Grand Highlander Hybrid MAX, Tundra i-FORCE MAX, Sequoia Check the manual Most are rated for 87; the manual for your year and engine is the final word

Required means the engine is calibrated for premium and lower octane can cause knock the engine computer has to pull timing to avoid. Recommended means the engine runs safely on regular with a small loss of peak output. Your owner's manual uses one word or the other; follow it.

What AAA measured

AAA ran lab tests on cars designed for regular gasoline and found no significant improvement in horsepower, fuel economy or emissions on premium. It estimated U.S. drivers were wasting about $2.1 billion a year on premium their cars did not need. A second phase on cars that recommend (but do not require) premium found modest gains in fuel economy and performance mainly under hard use such as towing and rapid acceleration, with little difference in ordinary city and highway driving.

What did make a measurable difference in AAA's testing was detergent: TOP TIER gasoline left far fewer engine deposits than non-TOP TIER fuel. Toyota's owner's manuals recommend TOP TIER detergent gasoline where available.

Ethanol, winter blends and knock

  • E10 (up to 10 percent ethanol) is fine in every Toyota. E15 is approved only where the manual says so; E85 only in a flex-fuel vehicle. Most Toyotas are not.
  • Winter gasoline in the Chicago area is blended to evaporate more easily in the cold, which can trim fuel economy slightly. That is normal.
  • If a regular-gas Toyota starts to ping under load, the cause is usually carbon build-up, a tank of poor fuel or an engine fault, not a need for premium. A diagnosis fixes it; premium only hides it.

Frequently asked questions

Does my Toyota need premium gas?

Almost certainly not. Most Toyotas, including all the hybrids, are designed for 87-octane regular. The GR Supra and GR86 require premium and the GR Corolla calls for it. Your owner's manual states the requirement for your engine.

Will premium gas give my Camry better mileage?

No. Toyota's guidance is that a higher octane than recommended does not improve fuel economy in normal driving, and AAA's testing on regular-gas cars found no gain in horsepower, economy or emissions.

Is premium gas cleaner?

Not because of octane. Deposit control comes from the detergent package. Choose a TOP TIER brand, in whichever octane your car calls for.

Can I use regular in a car that requires premium?

Not routinely. The engine computer will retard timing to limit knock, which costs power, and sustained knock can damage the engine. If you must, fill with the highest octane available and drive gently until you can refill with premium.

What octane does a Toyota hybrid use?

87-octane regular, for every current Toyota hybrid and plug-in hybrid.

Sources

Checked on October 19, 2026. Fuel requirements come from Toyota's owner's manuals and support site; the testing figures are AAA's.

  1. Toyota support: octane and fuel requirement articles, Toyota Motor Sales, U.S.A. support
  2. Premium Fuel Research, AAA
  3. U.S. Drivers Waste $2.1 Billion Annually on Premium Gasoline (Sept. 2016), AAA Newsroom
  4. Toyota owner's manuals and Warranty & Maintenance Guides, Toyota Motor Sales, U.S.A.