2018 Lexus RX 450h AWD MPG & Specs — Real-World vs EPA, All Trims
Every gas trim of this model takes premium.
Is the 2018 Lexus RX 450h AWD good on gas?
At up to 30 MPG combined, the 2018 Lexus RX 450h AWD is better than average for a Standard Sport Utility Vehicle 4WD — that class averages about 18.9 MPG across 1,684 EPA-tested versions, so it's a good pick on fuel for its size.
Real-world MPG vs the EPA number
The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.
At today's AAA national average price — $4.68/gal for premium gas as of 2026-07-05 — the most efficient trim runs about $2,340/year (roughly $195/month, about $15.60 per 100 miles) at the EPA's assumed 15,000 miles/year, using an estimated 500 gallons a year. We don't estimate a cost-per-fill since exact tank size isn't in the public EPA dataset, but the per-100-mile figure scales to any tank. Current national average gas prices →
2018 Lexus RX 450h AWD trims & fuel economy
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr (today's price) |
|---|---|---|---|
| 3.5L 6-cyl, AV-S6 automatic, AWD | PREMIUM | 30 | $2,340 |
2018 Lexus RX 450h AWD specs
What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.
| Engine options | 3.5L 6-cyl |
| Transmission | AV-S6 automatic |
| Drive type | AWD |
| EPA body class | Standard Sport Utility Vehicle 4WD |
| Fuel | Premium |
| Tailpipe CO₂ | 297 g/mi |
Other years of the Lexus RX 450h AWD
Similar cars (Standard Sport Utility Vehicle 4WD)
Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides
1 trim(s) · EPA FuelEconomy.gov data retrieved 2026-07-24 · fuel prices AAA national average as of 2026-07-05.