How big is the gas tank on a Lexus IS500?
It holds 15.9 gallons (about 60 liters).
The Lexus IS500, a V8-powered variant of the IS lineup, balances performance with everyday practicality. Knowing the fuel-tank size helps estimate how far you can travel between fills and plan road trips or track sessions more effectively. Here is what buyers and owners should know about the IS500’s gas tank and its practical implications.
Official fuel-tank capacity
Lexus officially lists the North American IS500 with a 15.9‑gallon fuel tank (approximately 60 liters). This figure aligns with the size expectations for a sporty, rear-wheel-drive sedan in its class, and it is generally consistent across model years, with minor market variations being possible.
Market and trim variations
In practice, the IS500’s tank size is designed to support its performance-focused character while remaining feasible for daily driving. Most regions selling the IS500 use a similar capacity, and any differences by market are typically small and not widely documented in standard specifications.
Practical implications for drivers
A 15.9‑gallon tank influences the driving range you can expect between fills. Real-world range depends on driving style, traffic, and whether you engage sport modes that increase fuel consumption. For planning long trips or track sessions, many owners gauge range by the onboard computer and fuel gauge rather than relying solely on labeled capacity, ensuring you’re never caught short between stations.
Summary
In short, the Lexus IS500 comes with a ~15.9‑gallon (60‑liter) fuel tank, a size that supports its performance profile while offering reasonable range for everyday use.
IS the IS500 good on gas?
How many miles per gallons does the IS 500 get? With its naturally aspirated V-8, the IS 500 can get up to 20 combined MPG (with 17 city around town and 25 on the highway). During my admittedly hard driving during the week-long review, the IS achieved 18.4 MPG, nearly matching some of its turbocharged competitors.
How big IS the fuel tank on a Lexus is 500?
The Lexus IS500 has a fuel tank capacity of 17.4 gallons. This is consistent across recent model years like 2022, 2023, and 2025.
- Fuel tank size: 17.4 gallons
- Fuel type: Premium unleaded gasoline is required.
- Approximate range: With a combined fuel economy of 20 MPG, the estimated range is around 296 miles in the city and 435 miles on the highway.
Does IS500 need premium gas?
Most Lexus vehicles, particularly those with turbocharged or performance-focused engines, require premium gas. If you're driving any of these models, be sure to fill up with 91-octane or higher: Lexus IS (IS 300, IS 350, IS 500) Lexus LS (LS 500, LS 500h)
IS Lexus discontinuing IS500?
Yes, the Lexus IS 500 has been discontinued, with the 2025 model year being the last one produced. Lexus is ending production of the IS 500, which featured a 5.0L V8 engine, and the 2026 model year will no longer include this variant. A special 2025 Lexus IS 500 Ultimate Edition was released as a final send-off for the model.
This video discusses the discontinuation of the IS 500 and its impact on performance sedan enthusiasts: 38sBrakeDownMediaYouTube · Sep 18, 2025
- The 2025 model year is the last chance to purchase the IS 500.
- Production of the IS 500 is scheduled to end in November 2025.
- The 2026 model year will no longer offer the IS 500 variant.
- A limited-edition 2025 IS 500 Ultimate Edition was released as a final send-off for the model.
You can watch this video to see a final review of the Lexus IS 500: 54sThe Novak ReportYouTube · Aug 9, 2025
