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Mercedes-Benz S-Class vs. Kia Optima MPG

Chart is based on 22 fuel economy reports for the Mercedes-Benz S-Class and 152 fuel economy reports for the Kia Optima.

Mercedes-Benz S-Class MPG

Mercedes-Benz S-Class Mercedes-Benz S-Class 2007 21.8 MPG Highway Percentage 45 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2007 25.0 MPG Highway Percentage 70 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 24.7 MPG Highway Percentage 98 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 23.5 MPG Highway Percentage 80 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2006 23.0 MPG Highway Percentage 85 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2004 19.9 MPG Highway Percentage 47 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2004 24.0 MPG Highway Percentage 80 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2003 18.1 MPG Highway Percentage 68 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2003 17.6 MPG Highway Percentage 71 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2002 19.5 MPG Highway Percentage 29 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2001 11.7 MPG Highway Percentage 0 percent Mercedes-Benz S-Class Mercedes-Benz S-Class 2000 24.0 MPG Highway Percentage 82 percent
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
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 flat med none 5 15 35 45 62 21.8  
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic AWD		 flat light none 10 10 10 70 65 25.0  
2006 4dr Sedan, ext. 302-horsepower 5.0L V8
7-speed shiftable automatic RWD		 flat med hvy 1 1 0 98 78 24.7  
2006 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic AWD		 flat light none 0 0 20 80 65 23.5  
2006 4dr Sedan, ext. 275-horsepower 4.3L V8
7-speed shiftable automatic RWD		 flat light hvy 0 15 0 85 60 23.0  
2004 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic AWD		 flat med none 1 45 8 47 80 19.9  
2004 4dr Sedan, ext. 275-horsepower 4.3L V8
7-speed shiftable automatic RWD		 flat med hvy 0 2 18 80 75 24.0  
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2003 4dr Sedan, ext. turbocharged 493hp 5.5L V12
5-speed shiftable automatic RWD		 flat light light 7 11 15 68 108 18.1  
2003 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat med hvy 6 12 12 71 70 17.6  
2002 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat med hvy 13 6 54 29 68 19.5  
2001 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic RWD		 flat med none 20 80 0 0 0 11.7  
2000 4dr Sedan, ext. 275-horsepower 4.3L V8
5-speed shiftable automatic RWD		 flat v.lt light 0 7 11 82 62 24.0  

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This page shows only averages. See all the Mercedes-Benz S-Class fuel economy data.

Kia Optima MPG

Kia Optima Kia Optima 2019 26.7 MPG Highway Percentage 40 percent Kia Optima Kia Optima 2017 52.6 MPG Highway Percentage 20 percent Kia Optima Kia Optima 2016 39.0 MPG Highway Percentage 80 percent Kia Optima Kia Optima 2013 25.5 MPG Highway Percentage 56 percent Kia Optima Kia Optima 2013 27.1 MPG Highway Percentage 54 percent Kia Optima Kia Optima 2013 32.5 MPG Highway Percentage 71 percent Kia Optima Kia Optima 2012 25.6 MPG Highway Percentage 39 percent Kia Optima Kia Optima 2012 32.3 MPG Highway Percentage 76 percent Kia Optima Kia Optima 2011 28.0 MPG Highway Percentage 68 percent Kia Optima Kia Optima 2011 28.7 MPG Highway Percentage 67 percent Kia Optima Kia Optima 2011 30.0 MPG Highway Percentage 75 percent Kia Optima Kia Optima 2010 20.0 MPG Highway Percentage 20 percent Kia Optima Kia Optima 2010 36.2 MPG Highway Percentage 80 percent Kia Optima Kia Optima 2009 29.1 MPG Highway Percentage 67 percent Kia Optima Kia Optima 2008 26.3 MPG Highway Percentage 10 percent Kia Optima Kia Optima 2008 26.2 MPG Highway Percentage 25 percent Kia Optima Kia Optima 2007 29.5 MPG Highway Percentage 78 percent Kia Optima Kia Optima 2007 23.2 MPG Highway Percentage 15 percent Kia Optima Kia Optima 2006.5 24.6 MPG Highway Percentage 58 percent Kia Optima Kia Optima 2006.5 28.9 MPG Highway Percentage 56 percent Kia Optima Kia Optima 2006.5 30.0 MPG Highway Percentage 90 percent Kia Optima Kia Optima 2005 12.1 MPG Highway Percentage 0 percent Kia Optima Kia Optima 2004 30.0 MPG Highway Percentage 95 percent
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
2019 4dr Sedan turbocharged 245hp 2.0L I4
6-speed shiftable automatic FWD		 flat med hvy 0 10 50 40 70 26.7  
2017 4dr Sedan 154-horsepower 2.0L I4 Hybrid
6-speed shiftable automatic FWD		 flat light light 30 30 20 20 70 52.6  
2016 4dr Sedan turbocharged 178hp 1.6L I4
7-speed automated manual FWD		 hills light light 6 0 14 80 67 39.0  
2013 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 flat light light 0 24 21 56 69 25.5  
2013 4dr Sedan 200-horsepower 2.4L I4
6-speed shiftable automatic FWD		 flat light none 0 32 14 54 83 27.1  
2013 4dr Sedan 159-horsepower 2.4L I4 Hybrid
6-speed shiftable automatic FWD		 flat v.lt none 2 13 15 71 102 32.5  
2012 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 hills light light 4 18 39 39 72 25.6  
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2012 4dr Sedan 200-horsepower 2.4L I4
6-speed shiftable automatic FWD		 flat med none 0 4 20 76 69 32.3  
2011 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 hills med light 0 5 28 68 70 28.0  
2011 4dr Sedan 200-horsepower 2.4L I4
6-speed shiftable automatic FWD		 hills light none 4 7 21 67 66 28.7  
2011 4dr Sedan 200-horsepower 2.4L I4
6-speed manual FWD		 flat med light 0 5 20 75 75 30.0  
2010 4dr Sedan 194-horsepower 2.7L V6
5-speed shiftable automatic FWD		 flat med light 0 10 70 20 75 20.0  
2010 4dr Sedan 175-horsepower 2.4L I4
5-speed shiftable automatic FWD		 flat light none 0 0 20 80 63 36.2  
2009 4dr Sedan 175-horsepower 2.4L I4
5-speed shiftable automatic FWD		 flat light light 5 12 16 67 65 29.1  
2008 4dr Sedan 162-horsepower 2.4L I4
5-speed shiftable automatic FWD		 flat light light 20 60 10 10 60 26.3  
2008 4dr Sedan 162-horsepower 2.4L I4
5-speed manual FWD		 flat lead light 30 15 30 25 75 26.2  
2007 4dr Sedan 185-horsepower 2.7L V6
5-speed shiftable automatic FWD		 flat med none 7 13 3 78 108 29.5  
2007 4dr Sedan 161-horsepower 2.4L I4
5-speed shiftable automatic FWD		 hills med none 1 36 48 15 63 23.2  
2006.5 4dr Sedan 185-horsepower 2.7L V6
5-speed shiftable automatic FWD		 flat light hvy 6 4 33 58 66 24.6  
2006.5 4dr Sedan 161-horsepower 2.4L I4
5-speed shiftable automatic FWD		 flat light light 18 16 9 56 63 28.9  
2006.5 4dr Sedan 161-horsepower 2.4L I4
5-speed manual FWD		 flat light hvy 0 0 10 90 60 30.0  
2005 4dr Sedan 170-horsepower 2.7L V6
4-speed shiftable automatic FWD		 hills lead light 5 95 0 0 0 12.1  
2004 4dr Sedan 138-horsepower 2.4L I4
5-speed manual FWD		 flat light hvy 0 0 5 95 70 30.0  

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This page shows only averages. See all the Kia Optima fuel economy data.

Mercedes-Benz S-Class vs. Kia Optima MPG

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Mercedes-Benz S-Class and Kia Optima's where a car was driven. So you can get an idea of their real-world MPG based on how and where you drive a car.

See TrueDelta's information for all Sedans, Coupes, and Convertibles.
See TrueDelta's information for all Mercedes-Benz models and Kia models.

What Our Members Are Saying about the Real Gas Mileage of the Mercedes-Benz S-Class

Mercedes-Benz S-Class Real Gas Mileage: Pros
YearBody/PowertrainComment
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 Since my driving is about 50-50 city and highway, I average about 20-21 mpg, using premium fuel. All highway is 29-30mpg and all city is 14-15mpg. see full Mercedes-Benz S-Class review
2007 0 While on long trips at 70-80mph I average 32mpg around town it never goes better than 24mpg. Easy on the pedal sure shows results but fully loaded the thing shifts like a two door sports. see full Mercedes-Benz S-Class review
Mercedes-Benz S-Class Real Gas Mileage: Cons
YearBody/PowertrainComment
2007 4dr Sedan turbocharged 232hp 3.0L V6 Diesel
7-speed shiftable automatic RWD		 Very, very expensive see full Mercedes-Benz S-Class review
2007 4dr Sedan, ext. 382-horsepower 5.5L V8
7-speed shiftable automatic RWD		 Driving it in a lot of stop and go traffic it drinks gas. see full Mercedes-Benz S-Class review
2007 0 Fuel cost are a killer and servicing requires finding an allternative to the Mercedes Garage see full Mercedes-Benz S-Class review
2001 4dr Sedan, ext. 302-horsepower 5.0L V8
5-speed shiftable automatic RWD		 20l/100km but its still worth it see full Mercedes-Benz S-Class review
 

TrueDelta Reviews the Real Gas Mileage of the Kia Optima

Kia Optima Real Gas Mileage: Pros
YearComment
2013 Many auto makers are substituting turbocharged fours for V6s because of their theoretically superior fuel economy. The Kia Optima SXL earns EPA ratings of 22 mpg city, 34 highway. The similarly turbo-foured Ford Fusion comes close, 22/33. The most fuel efficient V6, in the new Honda Accord, manages 21/34 without paddle shifters, but 21/32 with them. Trip computer numbers suggest a one-to-two mpg advantage for the Kia in real-world suburban driving--perhaps too close to call since these devices aren't terribly precise. Figure just under 20 with a heavy foot, mid-20s if you resist the temptation, and just over 30 with a very light foot and luck with the lights. All of these figures are with the engine warmed up. In cold weather, fuel economy is in the mid-teens for the first mile or two. An eco mode makes little noticeable difference in either how the car drives or its fuel economy. These numbers don't seem particularly good? Recall that the Kia Optima SXL is a very quick car. You won't find a 274-horsepower sedan that does better without the aid of a battery pack. see full Kia Optima review
 

What Our Members Are Saying about the Real Gas Mileage of the Kia Optima

Kia Optima Real Gas Mileage: Pros
YearBody/PowertrainComment
2013 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 I find fuel economy, in mixed driving, to be on par with a V6 of comparable power. I usually get about 24 MPG in combined driving. However, on a recent road trip, I had 32 MPG on one tank. It's perhaps slightly better than the Acura TL I had, but one big bonus: the Acura required premium unleaded. On the Kia Optima, however, the manufacturer only calls for regular unleaded. Over time, that can mean a significant savings. see full Kia Optima review
2012 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 This is my biggest (and only real) complaint with the Optima. It advertises fuel economy of 22 city, 34 highway. I drive a lot (100 mile round trip daily, with more than half of it being highway miles). Admittedly, I have a heavy foot, but I regularly get about 24-25 mpg combined, with the car in ECO mode. The best tank of gas I ever got was a little over 28 mpg. (I calculate it manually, don't rely on the on-board MPG estimates, as they are always 3-5 MPG more generous than reality.) see full Kia Optima review
2011 4dr Sedan 200-horsepower 2.4L I4
6-speed shiftable automatic FWD		 High 30s on the highway and 29-30 overall with a lot of power. Active eco. setting for better economy. see full Kia Optima review
2011 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 33 mpg on 200 mile trips at about 65 mph avg. see full Kia Optima review
2008 4dr Sedan 162-horsepower 2.4L I4
5-speed manual FWD		 Decent fuel mileage at this point for a mid-size sedan. see full Kia Optima review
2007 4dr Sedan 161-horsepower 2.4L I4
5-speed shiftable automatic FWD		 25-30 city/hwy see full Kia Optima review
2007 4dr Sedan 161-horsepower 2.4L I4
5-speed shiftable automatic FWD		 It may be a bit borderline in 100% city driving (19-20 mpg), but it gets 33mpg+ on the open highway, with only a 1-2 mpg penalty for using A/C. see full Kia Optima review
2007 4dr Sedan 161-horsepower 2.4L I4
5-speed shiftable automatic FWD		 got 42 mgh yesteerday on a 120 minute drive 25%/75% in town/highway driving. Like paying $2.25 per gallon, see full Kia Optima review
2005 4dr Sedan 170-horsepower 2.7L V6
4-speed shiftable automatic FWD		 AS above see full Kia Optima review
Kia Optima Real Gas Mileage: Cons
YearBody/PowertrainComment
2012 4dr Sedan turbocharged 274hp 2.0L I4
6-speed shiftable automatic FWD		 I'd recommend this car in a heartbeat. I honestly like this styling even more than the updates they've made since 2012. My biggest cons are the fuel economy and the lack of a manual transmission on any models other than the base model. see full Kia Optima review