How many miles per gallon does a 2000 Lexus RX300 get?

The 2000 Lexus RX300 typically achieves about 19–20 mpg in city driving and around 23–25 mpg on the highway, with exact numbers depending on drivetrain, maintenance, and driving conditions.

The RX300 was a first‑generation Lexus SUV that helped define the brand’s mid‑size luxury crossover niche. It uses a 3.0-liter V6 and a four-speed automatic transmission, and mpg results historically varied by whether the model was front‑wheel drive (FWD) or all‑wheel drive (AWD). This article summarizes typical EPA-era estimates and factors that influence real‑world mileage for this aging vehicle.

Estimated fuel economy by drivetrain

Here are the typical EPA-style estimates for the two common configurations of the 2000 RX300.

• Front-wheel drive (FWD): approximately 20 mpg in the city and 23–25 mpg on the highway.


• All-wheel drive (AWD): approximately 18–19 mpg in the city and about 23 mpg on the highway.

Note: individual results can vary based on tire choice, maintenance history, and driving conditions. Real-world mileage often differs from EPA estimates, especially on older vehicles.

Real-world driving and tips to maximize fuel economy

Beyond the official estimates, drivers report a range of real-world results. The following tips are commonly cited as ways to approach the vehicle’s potential efficiency.

• Keep tires inflated to the recommended pressure; underinflation increases rolling resistance and lowers mpg.


• Maintain the vehicle: timely spark plug and air filter replacement, and ensure oxygen sensors and the exhaust system are functioning well.


• Use the recommended fuel grade and avoid heavy ethanol blends if the vehicle isn’t tuned for them.


• Minimize aero drag by removing roof racks when not in use and by reducing cargo weight.


• Drive smoothly: gradual acceleration, consistent speeds, and avoiding prolonged idling can improve mpg.

Applying these practices won’t guarantee EPA numbers, but they can help maximize efficiency on a model that is more than two decades old.

Summary

For the 2000 Lexus RX300, expect roughly 19–20 mpg in city driving and about 23–25 mpg on the highway. AWD models tend to be a bit less efficient in city conditions. Real-world numbers depend on maintenance, tire condition, and driving style, but the RX300 remains a comfortable and practical option for its era.

How much is a 2000 Lexus RX300 worth today?

A 2000 Lexus RX RX 300 Sport Utility 4D has depreciated $85 or 3% in the last 3 years and has a current resale value of $2,442 and trade-in value of $1,095.

What is the common fault with the Lexus RX300?

The automatic boot motor is known for failing on the RX300. If you notice that the automatic boot makes a clunking noise when you press the button to open or close it, this indicates the motor is starting to fail. If the boot does not open at all, then the motor has completely failed.

What kind of gas mileage does a 2000 Lexus RX300 get?

2000 Lexus RX300 SUV Wheelbase: 103.1 inches Length: 180.1 inches Engine: 3-liter, 220-h.p., 24-valve V-6 Transmission: 4-speed automatic Fuel economy: 18 m.p.g. city/22 m.p.g. highway Base price: $33,905 Price as tested: $38,745.

Is the 2000 Lexus RX300 reliable?

The 2000 Lexus RX 300 is widely considered a highly reliable vehicle, with many owners reporting it has been trouble-free and capable of reaching high mileage (over 200,000 miles) with only regular maintenance. However, potential issues can arise from neglecting maintenance, especially oil changes, which can lead to engine sludge. Other common repairs that may be needed with age include timing belt replacement, strut replacement, and sensor issues.
 
You can watch this video for an overview of the Lexus RX 300's reliability and performance: 59sJayEmm on CarsYouTube · Mar 3, 2022
Positive aspects of reliability

• Longevity: Many owners report their RX 300s have lasted for over 200,000 miles with minimal major problems. 
• Durable drivetrain: The engine and transmission are generally very reliable, especially with consistent maintenance. 
• Overall high rating: The first-generation RX (1999-2003) has a high rating from owners, with many recommending the vehicle. 

Potential issues and maintenance

• Engine sludge: A lack of regular oil changes can lead to sludge buildup in the engine, causing more serious problems down the line. 
• Timing belt: The timing belt needs to be replaced at recommended intervals to prevent major engine damage. 
• Sensors: As with any older vehicle, various sensors (like the knock or O2 sensors) can fail over time. 
• Other age-related repairs: With high mileage, other components like struts, CV joints, and door lock actuators may need replacement. 

This video shows a detailed inspection of a Lexus RX 300 with several issues, which can give you an idea of what to look for: 1mJuan Carlos LTOYouTube · Aug 31, 2025