Infiniti EX vs. Mercury Mariner MPG

Chart is based on 233 fuel economy reports for the Infiniti EX and 35 fuel economy reports for the Mercury Mariner.

Infiniti EX 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
2012	4dr SUV 297-horsepower 3.5L V6 7-speed shiftable automatic RWD	flat	med	hvy	0	10	40	50	75	24.1
2012	4dr SUV 297-horsepower 3.5L V6 7-speed shiftable automatic AWD	flat	light	light	6	15	13	67	80	16.9
2011	4dr SUV 297-horsepower 3.5L V6 7-speed shiftable automatic AWD	hills	light	light	0	19	40	41	100	19.2
2010	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	flat	med	hvy	14	25	28	33	64	18.4
2010	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	flat	med	none	14	15	27	45	76	19.6
2009	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	flat	light	light	24	8	25	43	70	20.3
2009	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	flat	light	none	27	41	11	21	116	18.8
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2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	flat	med	light	15	26	16	43	67	20.9
2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	flat	light	light	4	10	18	68	94	18.9

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This page shows only averages. See all the Infiniti EX fuel economy data.

Mercury Mariner 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
2011	4dr SUV 240-horsepower 3.0L V6 6-speed automatic FWD	flat	v.lt	none	30	30	30	10	60	18.9
2009	4dr SUV 240-horsepower 3.0L V6 6-speed automatic FWD	flat	light	light	20	20	30	30	70	20.6
2009	4dr SUV 153-horsepower 2.5L I4 Hybrid CVT FWD	flat	light	light	11	13	31	44	60	35.5
2009	4dr SUV 153-horsepower 2.5L I4 Hybrid CVT AWD	flat	med	light	30	0	10	60	80	32.3
2008	4dr SUV 200-horsepower 3.0L V6 4-speed automatic FWD	flat	light	light	0	45	30	25	70	22.0
2008	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	flat	light	none	0	8	60	33	60	21.4
2008	4dr SUV 133-horsepower 2.3L I4 Hybrid CVT AWD	flat	light	hvy	5	18	55	23	65	30.8
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2007	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	flat	light	light	0	3	37	61	63	23.4
2007	4dr SUV 133-horsepower 2.3L I4 Hybrid CVT AWD	flat	light	light	11	16	56	18	70	29.8
2006	4dr SUV 200-horsepower 3.0L V6 4-speed automatic FWD	flat	light	light	8	13	35	45	62	23.1
2006	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	flat	med	light	0	0	25	75	75	21.5
2006	4dr SUV 133-horsepower 2.3L I4 Hybrid CVT AWD	hills	light	light	16	18	35	31	70	30.6
2005	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	flat	light	light	0	0	85	15	60	21.0
2005	4dr SUV 153-horsepower 2.3L I4 4-speed automatic AWD	flat	v.lt	light	3	13	8	75	67	22.3

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This page shows only averages. See all the Mercury Mariner fuel economy data.

See TrueDelta's information for all Infiniti models and Mercury models.

What Our Members Are Saying about the Real Gas Mileage of the Infiniti EX

Infiniti EX Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2013	4dr SUV 325-horsepower 3.7L V6 7-speed shiftable automatic AWD	Could be better by today's standards see full Infiniti EX review
2010	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	love the V6 power but the EPA MPG is worrisome see full Infiniti EX review
2010	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	OK This is NOT a car to buy if MPG is important although I am getting over 23 MPG avg. It is a POWERFUL car with a great drive train ready like a race horse at the gate to giddy up and it does when you need it on premium recommended fuel....in spades. I don't drive enough to care about fuel economy all that much. Not an econobox. see full Infiniti EX review
2009	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	17MPG in the city is a little disappointing for a vehicle with such finesse and reputation. I would guess Infiniti would cater to the masses with styling, performance and a little more economy. Not asking for miracles but I'm sure they could squeeze out 3 or 4 more MPG with the same 3.5L V6 see full Infiniti EX review
2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	Uses premium fuel. see full Infiniti EX review
2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic RWD	I average about 20 miles per gallon on premium fuel - with a mix of street and highway driving. I typically get 16 mpg in the city and 24 on the highway. Some of this is attributable to the 5 speed transmission on the car, which favors acceleration to economy. I imagine the 7 speed transmission should help the car get better highway economy. see full Infiniti EX review
2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	Expensive to keep fuelled given poor gas mileage and costs of premium fuel. Number 1 reason I am thinking of switching to another car. see full Infiniti EX review
2008	4dr SUV 297-horsepower 3.5L V6 5-speed shiftable automatic AWD	Slightly low if driving mostly city. see full Infiniti EX review

What Our Members Are Saying about the Real Gas Mileage of the Mercury Mariner

Mercury Mariner Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2010	0 171-horsepower 2.5L I4 6-speed automatic FWD	getting 31 mpg highway see full Mercury Mariner review
2009	4dr SUV 171-horsepower 2.5L I4 6-speed automatic FWD	Has been very good and getting better see full Mercury Mariner review
2009	4dr SUV 240-horsepower 3.0L V6 6-speed automatic FWD	Coming from a Trailblazer, we like the average of 21-22 MPG in mixed driving, as were used to about 17 MPG. Fuel economy climbs toward the rated 26 MPG the more highway driving we do. see full Mercury Mariner review
2007	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	For the first almost three years after we got the car, it gave 21+ mpg in town & 24+ mpg on the road. see full Mercury Mariner review
2005	4dr SUV 153-horsepower 2.3L I4 4-speed automatic AWD	For an SUV with a 4cyl and 4wd I get avg of 22 MPG mixed city and highway. I usually get 23-26 on freeway only. This is good. see full Mercury Mariner review

Mercury Mariner Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2007	4dr SUV 200-horsepower 3.0L V6 4-speed automatic AWD	For some reason when new Michelin All Terrain tires with Nitrogen air replaced the Champions from the factory, it plummeted to 17 & 20 mpg. No explanation from Michelin, Costco or Ford/Mercury - they have no idea why. see full Mercury Mariner review