Lexus RX 300 MPG and Fuel Economy
Lexus have been manufacturing models of RX 300 for 5 years, with the latest vehicle in 2003 having a combined MPG of 18.
The estimated fuel cost for the 2003 Lexus RX 300 is $3,500 per year.
Government regulators have estimated that value based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
💵 Compared to an average vehicle over 5 years, you will spend $6,000 more on fuel driving a 2003 Lexus RX 300.
🛢 The Lexus RX 300 will consume roughly 17 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.
💨 For every mile driven, the Lexus RX 300 will emit -1 grams of CO2, which is about -15,000 grams of CO2 per year.
🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 1 tree would be needed to offset emissions from the Lexus RX 300.
The table below is a complete list of the 5 Lexus RX 300 fuel efficiency specifications we have data for.
Click any vehicle link to see a more detailed breakdown of the car, miles per gallon, emissions, and more.
| Vehicle | Combined MPG | Fuel Cost |
|---|---|---|
| 2003 Lexus RX 300 | 18 | $3,500 |
| 2002 Lexus RX 300 | 18 | $3,500 |
| 2001 Lexus RX 300 | 18 | $3,500 |
| 2000 Lexus RX 300 | 19 | $3,300 |
| 1999 Lexus RX 300 | 19 | $3,300 |
Link To or Reference This Page
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<a href="https://mpgbuddy.com/cars/lexus/rx-300">Lexus RX 300 MPG and Fuel Economy</a>
"Lexus RX 300 MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/lexus/rx-300.
"Lexus RX 300 MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/lexus/rx-300. Accessed January 3, 2026.
Lexus RX 300 MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/lexus/rx-300.