How big is the gas tank on a 2020 Lexus IS 300?
The 2020 Lexus IS 300 has a fuel tank capacity of 15.9 gallons (60 liters).
In this article, we examine the official tank size for the 2020 IS 300, how it compares within the IS lineup, and what the tank size means for daily driving and refueling. We’ll also note any relevant differences between configurations in the U.S. market.
Official fuel tank capacity
The following figures reflect U.S.-market specifications for the 2020 IS 300 and related variants. The IS 300 uses a 15.9-gallon (60-liter) tank, and this size is shared across both rear-wheel-drive (RWD) and all-wheel-drive (AWD) versions of the IS 300.
- IS 300 (2.0L turbo inline-4, RWD or AWD): 15.9 gallons (60 L)
- IS 350 (3.5L V6): 17.4 gallons (66 L)
Note: The larger-capacity tank in the IS 350 reflects its different engine and performance positioning. The IS 300’s 15.9-gallon tank is designed to balance fuel economy with sporty performance in this model line.
How the tank size affects driving and refueling
Fuel-tank capacity directly influences how often you’ll need to refuel on typical daily driving. A 15.9-gallon tank means fewer stops on long commutes or road trips than smaller-tank competitors with similar powertrains, but it also pairs with the IS 300’s fuel economy and driving dynamics to determine overall range. Real-world range will vary based on driving style, traffic conditions, and maintenance.
Practical notes for owners
For owners, it’s helpful to know the exact tank size when planning trips, budgeting for fuel, or calculating maintenance needs. If you’re comparing used IS 300s, confirm the tank size listed by the seller or in the vehicle’s manual, especially if the car has undergone any modifications or regional warranty considerations.
Summary
The 2020 Lexus IS 300 features a 15.9-gallon (60-liter) fuel tank, shared across both RWD and AWD configurations. By comparison, the IS 350 uses a larger 17.4-gallon (66-liter) tank. This difference aligns with the IS lineup’s engine options and performance positioning, while the IS 300 remains tuned for a balance of performance and efficiency. In daily use, expect fewer fuel stops with the IS 300 than with smaller-tank rivals of similar size and power.
What are common problems with the IS 300?
Top Lexus IS300 Problems
- Check Engine Light Due to EVAP System Failure.
- Check Engine Light and Lack of Power Due to Failed Mass Air Flow Sensor.
- Lexus IS300 won't start despite strong battery current, seeking diagnostic suggestions.
- Lexus IS300 bald front tires and worn front brake pads issue.
How many miles per gallon does a 2020 Lexus IS 300 get?
The 2020 Lexus IS 300 is capable of achieving 21 mpg in the city and 30 mpg on the highway.
How many gallons does a Lexus IS 300 hold?
The Lexus IS300 fuel tank capacity is 17.4 gallons for recent models (2019-2024) and 66 liters (approximately 17.4 gallons) for some international and older models. It is important to check your specific model year and region, as capacity can vary slightly.
- Recent US models: 17.4 gallons
- Some international and older models: 66 liters (approximately 17.4 gallons)
Is Lexus IS 300 good on gas?
Fuel economy is not the IS 300's strong suit, with the all-wheel-drive version only EPA-estimated to return 19 miles per gallon in the city, 26 mpg highway and 22 mpg combined. Over the course of a few days, I'm averaging just over 21 mpg.
