2020 Lexus GX — Full Specifications
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The 2020 Lexus GX is an SUV powered by a 4.6L 8-cyl premium gasoline engine. It returns around 19 mpg (UK) / 16 mpg (US EPA) combined. Owners often keep a Lexus GX workshop manual to hand for servicing and repairs.
Compared with the 2019 Lexus GX: Fuel economy is essentially unchanged at around 19 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 4.6L 8-cyl |
|---|---|
| Transmission | Automatic (S6) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | 4-Wheel Drive |
| Body Style | SUV |
| Fuel Economy (UK) | 19 combined / 18 urban / 23 extra-urban mpg |
| Fuel Economy (US EPA) | 16 combined / 15 city / 19 highway mpg |
| CO₂ Emissions | 337 g/km |
| EPA Greenhouse Gas Score | 2 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $5,150 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 1 configuration for the 2020 Lexus GX, all with the 4.6L 8-cyl engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 4.6L 8-cyl | Automatic (S6) | 4-Wheel Drive | 19 | 16 (15/19) | 337 | $5,150 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
Owner Essentials for the 2020 Lexus GX
Running Costs: 2020 Lexus GX
Covering around 8,000 miles a year in a 2020 Lexus GX at 19 mpg combined, expect roughly 1,914 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $5,150 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2020 Lexus GX Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2020 Lexus GX as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 5 complaints with NHTSA about the 2020 Lexus GX. The most-reported areas are Seat belts (1), Unspecified (1), Visibility (1). Complaints include 1 reported crash.
Used-buyer checklist for the 2020 Lexus GX
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Seat belts (1 owner complaint) — Check every belt latches and retracts properly and that any restraint recalls were completed.
- Visibility (1 owner complaint) — Check wipers, washers and demisters work properly.
- Brakes (1 owner complaint) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Lexus GX compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 19 mpg figure is 8 mpg below that average. Its 337 g/km CO₂ figure is 84 g/km higher than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
Lexus models in our database average about 28 mpg (UK) combined on their most efficient configuration; the 2020 Lexus GX's 19 mpg is 9 mpg below that make average. Its 337 g/km CO₂ figure is 85 g/km higher than the 252 g/km Lexus average.
Of the 17 Lexus GX model years we cover, the 2020 ranks 11th for combined fuel economy on its best configuration (19 mpg UK combined, against a high of 20 mpg). See every Lexus GX year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2020 Lexus GX
Frequently Asked Questions
What engine does the 2020 Lexus GX have?
It's fitted with a 4.6L 8-cyl premium gasoline engine, paired with a automatic (s6) transmission.
What is the fuel economy of the 2020 Lexus GX?
The most efficient configuration returns around 19 mpg (UK) combined, or 16 mpg on the US EPA cycle.
How much does the 2020 Lexus GX cost to fuel per year?
The US EPA estimates about $5,150 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2020 Lexus GX have any recalls?
NHTSA lists no safety recall campaigns for the 2020 Lexus GX as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2020 Lexus GX?
Among the 5 owner complaints filed with NHTSA, the most-reported areas are Seat belts (1 complaint), Unspecified (1 complaint), Visibility (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
Is the Lexus GX's fuel economy good for an SUV?
It returns around 19 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track.