Lexus IS vs. GMC Sierra 1500 MPG

Chart is based on 143 fuel economy reports for the Lexus IS and 526 fuel economy reports for the GMC Sierra 1500.

Lexus IS MPG

Year	Body/Powertrain	flat, hilly, or mountainousLand	driving style: very light to "lead foot"Foot	A/C use: none to heavyA/C	constant stop and goTraf %	many stops per mileCity %	stop every mile or twoSub %	fairly steady speedHwy %	Hwy Spd	MPG
2016	4dr Sedan 306-horsepower 3.5L V6 8-speed shiftable automatic RWD	flat	light	light	50	10	20	20	70	18.7
2010	4dr Sedan 416-horsepower 5.0L V8 8-speed shiftable automatic RWD	flat	med	light	0	0	98	2	80	20.3
2010	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	flat	med	light	5	70	10	15	60	21.8
2010	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	hills	med	none	7	16	33	44	83	20.3
2009	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	flat	light	none	2	9	33	57	90	25.4
2009	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	hills	light	light	5	5	20	70	65	27.0
2008	4dr Sedan 416-horsepower 5.0L V8 8-speed shiftable automatic RWD	flat	med	hvy	20	25	27	28	70	17.7
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2008	4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD	hills	med	none	16	20	25	40	66	24.9
2008	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	flat	v.lt	light	15	15	15	55	70	31.0
2008	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	flat	light	light	4	18	57	21	61	22.4
2008	4dr Sedan 204-horsepower 2.5L V6 6-speed manual RWD	flat	med	light	8	63	10	20	110	20.5
2007	4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD	flat	med	light	6	21	23	50	75	24.6
2007	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	flat	light	hvy	5	5	10	80	70	31.8
2007	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	flat	light	light	5	23	28	45	63	25.3
2006	4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD	flat	med	light	7	50	13	30	71	22.1
2006	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	flat	med	light	9	25	20	47	88	24.9
2006	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	hills	light	light	5	5	25	65	70	24.0
2005.5	4dr Sedan 204-horsepower 2.5L V6 6-speed manual RWD	flat	med	none	20	20	0	60	80	23.3
2005	4dr Sedan 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	med	light	41	49	0	11	59	15.9
2004	4dr Wagon 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	lead	hvy	20	15	15	50	75	19.0
2004	4dr Sedan 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	med	light	1	27	6	66	77	21.1
2004	4dr Sedan 215-horsepower 3.0L I6 5-speed manual RWD	flat	med	light	7	29	16	48	71	24.0
2003	4dr Sedan 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	med	light	9	33	18	41	88	19.6
2003	4dr Sedan 215-horsepower 3.0L I6 5-speed manual RWD	flat	med	none	0	0	30	70	75	23.4
2002	4dr Wagon 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	med	light	12	19	43	26	80	21.7
2002	4dr Sedan 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	flat	med	light	10	40	15	35	68	19.6
2002	4dr Sedan 215-horsepower 3.0L I6 5-speed manual RWD	flat	med	light	15	24	39	23	73	21.5

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This page shows only averages. See all the Lexus IS fuel economy data.

GMC Sierra 1500 MPG

Year	Body/Powertrain	flat, hilly, or mountainousLand	driving style: very light to "lead foot"Foot	A/C use: none to heavyA/C	constant stop and goTraf %	many stops per mileCity %	stop every mile or twoSub %	fairly steady speedHwy %	Hwy Spd	MPG
2021	4dr Crew Cab 6ft bed turbocharged 277hp 3.0L V6 Diesel 10-speed shiftable automatic 4WD w/low range	flat	light	light	0	25	25	50	70	24.5
2018	4dr Crew Cab 5.5ft bed 420-horsepower 6.2L V8 8-speed shiftable automatic 4WD w/low range	flat	light	light	0	5	15	80	70	22.0
2015	4dr Crew Cab 5.5ft bed 420-horsepower 6.2L V8 8-speed shiftable automatic 4WD w/low range	flat	med	light	0	5	0	95	65	20.9
2015	2dr Regular Cab 6.5ft bed 355-horsepower 5.3L V8 6-speed shiftable automatic 4WD w/low range	flat	med	none	8	38	0	55	118	18.7
2014	4dr Crew Cab 5.5ft bed 420-horsepower 6.2L V8 6-speed shiftable automatic 4WD w/low range	hills	med	none	0	0	25	75	75	18.9
2014	4dr Crew Cab 5.5ft bed 355-horsepower 5.3L V8 6-speed shiftable automatic RWD	flat	light	hvy	5	10	0	85	63	25.0
2011	4dr Extended Cab 6.5ft bed 403-horsepower 6.2L V8 6-speed shiftable automatic RWD	flat	med	light	5	10	25	60	75	16.5
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2011	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 6-speed shiftable automatic RWD	flat	med	hvy	5	0	25	70	60	18.3
2011	4dr Extended Cab 6.5ft bed 302-horsepower 4.8L V8 4-speed automatic 4WD, part-time w/low range	hills	light	none	3	18	42	37	70	15.2
2010	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 6-speed shiftable automatic 4WD w/low range	flat	light	light	10	35	15	40	71	15.8
2010	4dr Crew Cab 5.5ft bed 403-horsepower 6.2L V8 6-speed shiftable automatic AWD	hills	med	light	0	25	25	50	60	18.5
2010	2dr Regular Cab 6.5ft bed 302-horsepower 4.8L V8 4-speed automatic RWD	flat	med	light	18	1	0	81	68	18.0
2009	4dr Extended Cab 6.5ft bed 367-horsepower 6.0L V8 6-speed shiftable automatic 4WD w/low range	flat	med	none	3	8	23	68	63	17.3
2009	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range	hills	med	none	5	80	0	15	75	15.4
2009	4dr Crew Cab 5.5ft bed 367-horsepower 6.0L V8 6-speed shiftable automatic 4WD w/low range	flat	light	hvy	0	0	0	100	110	16.8
2009	4dr Crew Cab 5.5ft bed 315-horsepower 5.3L V8 6-speed shiftable automatic 4WD w/low range	flat	light	light	8	28	17	47	65	17.9
2008	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 4-speed automatic RWD	flat	light	light	0	10	0	90	100	20.3
2008	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD w/low range	hills	light	light	17	22	27	34	60	17.0
2008	4dr Extended Cab 5.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD w/low range	hills	light	light	0	33	25	42	70	17.0
2008	4dr Crew Cab 5.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	light	none	9	0	27	64	60	17.9
2008	4dr Crew Cab 5.5ft bed 295-horsepower 4.8L V8 4-speed automatic 4WD, part-time w/low range	hills	lead	none	18	0	33	50	115	14.0
2008	2dr Regular Cab 8ft bed 295-horsepower 4.8L V8 4-speed automatic RWD	flat	light	light	0	0	10	90	65	22.0
2008	2dr Regular Cab 6.5ft bed 195-horsepower 4.3L V6 4-speed automatic RWD	flat	light	none	5	10	10	75	60	19.5
2007	4dr Extended Cab 6.5ft bed 367-horsepower 6.0L V8 4-speed automatic 4WD w/low range	hills	light	light	0	10	10	80	60	14.1
2007	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 4-speed automatic RWD	flat	light	light	12	37	25	27	75	17.7
2007	4dr Extended Cab 6.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	med	light	5	0	53	43	70	14.1
2007	4dr Crew Cab 5.5ft bed 367-horsepower 6.0L V8 4-speed automatic RWD	flat	med	light	5	30	7	59	70	18.1
2007	4dr Crew Cab 5.5ft bed 367-horsepower 6.0L V8 4-speed automatic 4WD w/low range	flat	med	none	23	3	0	74	75	16.5
2007	4dr Crew Cab 5.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range	flat	light	light	10	30	45	15	60	18.1
2007	4dr Crew Cab 5.5ft bed 315-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	light	none	4	10	9	77	66	18.4
2007	4dr Crew Cab 5.5ft bed 295-horsepower 4.8L V8 4-speed automatic RWD	flat	med	light	5	65	0	30	60	16.7
2006	4dr Extended Cab 6.5ft bed 295-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	light	none	30	20	20	30	100	14.7
2006	4dr Extended Cab 5.5ft bed 295-horsepower 5.3L V8 4-speed automatic RWD	flat	light	light	10	40	25	25	65	18.5
2006	4dr Crew Cab 5.5ft bed 345-horsepower 6.0L V8 4-speed automatic AWD	flat	med	none	5	20	50	25	65	15.3
2006	4dr Crew Cab 5.5ft bed 310-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range	flat	light	none	2	80	10	8	70	16.8
2005	4dr Extended Cab 6.5ft bed 310-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	light	light	7	11	13	69	62	16.0
2005	4dr Extended Cab 6.5ft bed 295-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	med	hvy	4	8	88	0	N/A	17.5
2005	4dr Extended Cab 6.5ft bed 285-horsepower 4.8L V8 4-speed automatic 4WD w/low range	flat	light	light	0	0	0	100	110	17.4
2005	4dr Crew Cab 5.5ft bed 295-horsepower 5.3L V8 4-speed automatic 4WD w/low range	hills	light	light	0	10	10	81	68	16.2
2005	2dr Regular Cab 6.5ft bed 285-horsepower 4.8L V8 4-speed automatic RWD	flat	med	hvy	0	2	18	80	65	19.5
2003	4dr Extended Cab 6.5ft bed 285-horsepower 5.3L V8 4-speed automatic RWD	flat	light	light	13	13	13	60	60	17.3
2003	4dr Extended Cab 6.5ft bed 285-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range	hills	v.lt	none	0	20	10	70	100	12.5
2003	4dr Extended Cab 6.5ft bed 285-horsepower 5.3L V8 4-speed automatic 4WD w/low range	flat	light	none	0	10	20	70	60	16.8
2001	4dr Extended Cab 6.5ft bed 285-horsepower 5.3L V8 4-speed automatic 4WD, part-time w/low range	flat	med	none	0	40	0	60	70	14.9
2001	2dr Regular Cab 6.5ft bed 270-horsepower 4.8L V8 4-speed automatic RWD	flat	med	light	0	40	0	60	110	77.8

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This page shows only averages. See all the GMC Sierra 1500 fuel economy data.

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See TrueDelta's information for all Lexus models and GMC models.

TrueDelta Reviews the Real Gas Mileage of the Lexus IS

Lexus IS Real Gas Mileage: Cons
Year	Comment
	The 2014 IS 350 manages 19 mpg in the EPA city test, and 28 in the highway test. While these figures tie those for the Cadillac ATS 3.6, they're short of the 23/33 achieved by the BMW 335i. Also, with both the BMW and the Cadillac you can step down to more efficient turbocharged four-cylinder engines. With the new IS, your only other engine option is a small V6, and its fuel economy is only a couple mpg better than that of the big V6 (21/30). The BMW has a further advantage: you can set the steering and suspension to "Sport" without forcing the transmission to hold a lower gear. In the 2014 IS 350 F Sport, the sport modes are "all or nothing." Select one to firm up the steering and suspension, and the transmission won't shift beyond sixth gear, reducing fuel economy. Lexus should follow Audi's lead and offer an "Individual" mode, where each system (powertrain, steering, suspension, etc.) can be set separately. see full Lexus IS review

What Our Members Are Saying about the Real Gas Mileage of the Lexus IS

Lexus IS Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2010	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	Almost as good as Prius, this is the hybrid 250h see full Lexus IS review
2010	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	Our 2010 IS 250 has given us 30 mph highway mileage. I consider it very very good. see full Lexus IS review
2009	4dr Sedan 306-horsepower 3.5L V6 6-speed shiftable automatic RWD	Excellent fuel economy... overall 24 mpg city and highway combined. As high as 32 mpg highway driving in Arizona mountains. see full Lexus IS review
2009	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	Good highway fuel economy, can average 30+ mpg see full Lexus IS review
2008	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	My real world economy has been 33 mpg hwy (not the computer figure, an optimistic 34.5-35)which is better than expected and slightly over 20 in city driving (not heavy traffic), also better than expected see full Lexus IS review
2008	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic AWD	Good fuel economy for a 1600kg car with AWD. see full Lexus IS review
2006	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	At around 200hp, it isnt the fastest luxury sedan. However, on my roadtrip across the eastern / mid eastern USA I was able to get ~33 ish mpg (computer reported) on flat terrain and premium fuel. City mpg is what I expect,22-25ish. But I think it is great as a long distance comfortable vehicle. see full Lexus IS review

Lexus IS Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2009	4dr Sedan 204-horsepower 2.5L V6 6-speed shiftable automatic RWD	Wish it got better fuel economy for such a small car and engine... Sticker is 21/29, I'm averaging 27MPG (computer read); avg on hwy is about 33-34 mpg while city is about 19-23mpg. Engine variety would help, a 4 cyl + turbo or something, but toyota/lexus isn't exactly known for that. see full Lexus IS review
2002	4dr Wagon 215-horsepower 3.0L I6 5-speed shiftable automatic RWD	For a small, relatively modestly powered car, it gets poor economy. Corvettes and most Porsches get better economy. see full Lexus IS review

What Our Members Are Saying about the Real Gas Mileage of the GMC Sierra 1500

GMC Sierra 1500 Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2004	4dr Extended Cab 6.5ft bed 295-horsepower 5.3L V8 4-speed automatic 4WD w/low range	Its great. see full GMC Sierra 1500 review

GMC Sierra 1500 Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2006	4dr Extended Cab 6.5ft bed 295-horsepower 5.3L V8 4-speed automatic 4WD w/low range	Fuel economy is a suggestion - the truck, like all trucks, gets mediocre fuel economy. see full GMC Sierra 1500 review