Does 2023 Lexus ES 350 require premium gas?
Yes. The 2023 Lexus ES 350 is designed to run on premium unleaded gasoline (91 octane or higher) to deliver its stated performance; regular gasoline is not recommended.
What the manufacturer says about fuel requirements
The following overview summarizes the ES 350’s official guidance on octane and fuel type, and what that means for daily driving.
Engine and octane basics
- The ES 350 uses a 3.5-liter V6 engine that benefits from premium fuel to maintain peak power and smooth operation.
- Official guidance typically specifies premium unleaded gasoline with an octane rating of 91 or higher (AKI-based rating).
- Regular unleaded gasoline is not the recommended fuel for maximum performance, though some markets may permit it with potential performance trade-offs.
Following the manufacturer’s octane guidance helps ensure the engine operates as designed, with optimal timing and power delivery.
Practical effects of using non-premium fuel
If premium gasoline isn’t available every fill, here’s what drivers commonly experience and should know about the ES 350 when regular gas is used.
- Performance may be reduced: Acceleration and power delivery can feel less robust as the engine timing is adjusted to prevent knocking.
- Engine ping/knock potential: Under certain conditions, you might hear pinging or knocking, especially under load or high temperatures.
- Fuel economy can vary: Real-world MPG may be slightly lower due to altered combustion and timing adjustments.
- Long-term durability considerations: Repeated use of lower-octane fuel can place additional stress on the engine over time, making premium fuel the safer choice for longevity.
In practice, the ES 350 will run on regular fuel if needed, but drivers should expect diminished performance and efficiency compared with using premium gasoline.
How to handle fuel choices in daily life
These guidelines help you stay aligned with the ES 350’s design while balancing convenience and cost.
- Prioritize premium for daily driving, especially in hot weather, heavy loads, or spirited acceleration scenarios.
- When premium isn’t available, avoid high-load driving and refuel with premium at the next opportunity to restore optimal performance.
- Check your market’s octane rating system and consult the owner’s manual for the exact specification, since octane labeling can vary by region.
Sticking to premium fuel supports the vehicle’s intended performance and efficiency profile.
Summary
The 2023 Lexus ES 350 is designed to operate at its best on premium unleaded gasoline with an octane rating of 91 or higher. Regular fuel is not recommended and can lead to reduced power, potential knocking, and lower efficiency. For optimal performance and durability, use premium fuel and follow the octane guidance in your manual.
