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Nissan Z vs. Kia Optima MPG

Chart is based on 143 fuel economy reports for the Nissan Z and 152 fuel economy reports for the Kia Optima.

Nissan Z MPG

Nissan Z Nissan Z 2013 22.8 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2012 20.2 MPG Highway Percentage 57 percent Nissan Z Nissan Z 2011 19.4 MPG Highway Percentage 33 percent Nissan Z Nissan Z 2011 24.4 MPG Highway Percentage 70 percent Nissan Z Nissan Z 2010 20.0 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2010 21.0 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2010 21.7 MPG Highway Percentage 38 percent Nissan Z Nissan Z 2009 23.9 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2009 24.9 MPG Highway Percentage 59 percent Nissan Z Nissan Z 2009 16.9 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2008 21.0 MPG Highway Percentage 48 percent Nissan Z Nissan Z 2007 22.1 MPG Highway Percentage 59 percent Nissan Z Nissan Z 2007 14.1 MPG Highway Percentage 10 percent Nissan Z Nissan Z 2007 19.0 MPG Highway Percentage 40 percent Nissan Z Nissan Z 2006.5 21.0 MPG Highway Percentage 30 percent Nissan Z Nissan Z 2006 21.2 MPG Highway Percentage 50 percent Nissan Z Nissan Z 2006 18.0 MPG Highway Percentage 5 percent Nissan Z Nissan Z 2006 21.9 MPG Highway Percentage 24 percent Nissan Z Nissan Z 2006 22.0 MPG Highway Percentage 35 percent Nissan Z Nissan Z 2006 25.2 MPG Highway Percentage 88 percent Nissan Z Nissan Z 2005 25.7 MPG Highway Percentage 78 percent Nissan Z Nissan Z 2005 21.4 MPG Highway Percentage 26 percent Nissan Z Nissan Z 2005 17.6 MPG Highway Percentage 16 percent Nissan Z Nissan Z 2005 20.9 MPG Highway Percentage 46 percent Nissan Z Nissan Z 2005 17.8 MPG Highway Percentage 35 percent Nissan Z Nissan Z 2004 22.1 MPG Highway Percentage 51 percent Nissan Z Nissan Z 2004 20.5 MPG Highway Percentage 13 percent Nissan Z Nissan Z 2004 22.7 MPG Highway Percentage 55 percent Nissan Z Nissan Z 2004 23.8 MPG Highway Percentage 84 percent Nissan Z Nissan Z 2003 21.9 MPG Highway Percentage 30 percent Nissan Z Nissan Z 2003 21.3 MPG Highway Percentage 34 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
2013 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
flat light light 0 10 40 50 70 22.8  
2012 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
flat med hvy 2 15 27 57 73 20.2  
2011 2dr Hatch 332-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 3 25 40 33 75 19.4  
2011 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
flat med light 0 3 27 70 67 24.4  
2010 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
flat med light 0 50 0 50 80 20.0  
2010 2dr Convertible 332-horsepower 3.7L V6
7-speed shiftable automatic RWD
hills med light 0 0 50 50 80 21.0  
2010 2dr Convertible 332-horsepower 3.7L V6
6-speed manual RWD
flat med light 24 13 24 38 60 21.7  
Looking for a warranty? Get a quote.
2009 2dr Hatch 350-horsepower 3.7L V6
6-speed manual RWD
hills med none 0 0 50 50 75 23.9  
2009 2dr Hatch 332-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 6 4 31 59 62 24.9  
2009 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
flat med light 21 20 10 50 70 16.9  
2008 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
flat med light 5 4 43 48 71 21.0  
2007 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
flat med light 6 8 28 59 84 22.1  
2007 2dr Hatch 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
hills med hvy 35 35 20 10 65 14.1  
2007 2dr Convertible 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
hills med light 20 10 30 40 63 19.0  
2006.5 2dr Hatch 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med none 10 10 50 30 60 21.0  
2006 2dr Hatch 300-horsepower 3.5L V6
6-speed manual RWD
flat med light 8 19 23 50 78 21.2  
2006 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
flat med hvy 10 70 15 5 75 18.0  
2006 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 9 21 47 24 66 21.9  
2006 2dr Convertible 300-horsepower 3.5L V6
6-speed manual RWD
flat med none 5 20 40 35 60 22.0  
2006 2dr Convertible 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med none 12 0 0 88 75 25.2  
2005 2dr Hatch 300-horsepower 3.5L V6
6-speed manual RWD
hills med light 12 3 8 78 65 25.7  
2005 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
flat med light 22 34 19 26 75 21.4  
2005 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 11 61 13 16 60 17.6  
2005 2dr Convertible 287-horsepower 3.5L V6
6-speed manual RWD
flat med hvy 12 27 16 46 78 20.9  
2005 2dr Convertible 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light light 0 0 65 35 65 17.8  
2004 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
flat med hvy 15 14 19 51 67 22.1  
2004 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light light 4 4 79 13 66 20.5  
2004 2dr Convertible 287-horsepower 3.5L V6
6-speed manual RWD
flat med light 23 11 11 55 67 22.7  
2004 2dr Convertible 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 1 16 0 84 68 23.8  
2003 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
flat med light 6 26 37 30 67 21.9  
2003 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 3 36 26 34 70 21.3  

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This page shows only averages. See all the Nissan Z 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.

Nissan Z 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 Nissan Z 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 Hatchbacks and Convertibles.
See TrueDelta's information for all Nissan models and Kia models.

What Our Members Are Saying about the Real Gas Mileage of the Nissan Z

Nissan Z Real Gas Mileage: Pros
YearBody/PowertrainComment
2011 2dr Hatch 332-horsepower 3.7L V6
7-speed shiftable automatic RWD
I recommend changing your oil as soon as you get the car with basic 5w30 oil. Then @ 1200 miles use the nissan ester oil. @ 5000 miles switch again to a premium synthetic. Redline, Royal purple & amsoil. Engine will run supersmooth with 23mpg avg. see full Nissan Z review
2011 2dr Hatch 332-horsepower 3.7L V6
6-speed manual RWD
Reasonable fuel economy considering the 332 hp and 270 ft lbs of torque available. see full Nissan Z review
2007 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
If I shift between 2k to 2.5k, I get about 22mpg city and 27 mpg hwy. If I shift at 4.5k rpm (which I mostly do) I get about 16 mpg city and 20 mpg hwy. see full Nissan Z review
2007 2dr Convertible 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
Very Good and exactly as projected with pump fuel 93. Higher octane race fuel affords better mileage ,as with any vehicle proper maintenence ensuring air filters are clean . I change my oil every 3-5 000 miles and I love this car see full Nissan Z review
2007 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
Good gas mileage for a car with over 300 hp. see full Nissan Z review
2003 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
A lot better than the previous Jeep I owned. It is average in the car market today though. see full Nissan Z review
2003 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
better than average comparing to vehicles in the same class see full Nissan Z review
Nissan Z Real Gas Mileage: Cons
YearBody/PowertrainComment
2011 2dr Hatch 332-horsepower 3.7L V6
7-speed shiftable automatic RWD
Withoout high quality (pricey) synthetic? Good look getting anything over 20mpg. see full Nissan Z review
2007 2dr Hatch 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
terrible fuel economy for urban owners see full Nissan Z review
2007 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
It was worse than my 303 hp 5.3L V8 Grand Prix, and though it was faster off the line (by about .3 seconds), the Grand Prix GXP was much faster in highway gears. So better MPG and more juice at highway speeds made the GP a better choice for me. see full Nissan Z review
2007 2dr Hatch 306-horsepower 3.5L V6
6-speed manual RWD
If you drive it hard, you get 17mpg. see full Nissan Z review
2005 2dr Hatch 300-horsepower 3.5L V6
6-speed manual RWD
Only drinks premium grade and you can almost see the fuel gauge sinking. see full Nissan Z review
2004 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
it is a sports car see full Nissan Z review
2004 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
This car's fuel economy shows how much the world has moved forward with regards to fuel management. My commute is pretty much 50/50 city/highway, and I get 19-22 MPG on average depending on weather and A/C usage. My best tanks were in the 26-27 MPG range on those long trips to NY/FL. For reference, a 335i makes more power and probably averages about 22-24 MPG in mixed driving and can get over 30 MPG no problem on the highway. When you drive ~25000 miles a year that definitely adds up. see full Nissan Z review
2004 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
You have to drive like a grandma to get the estimated gas mileages. more realistically you are looking at 15-19mpg average, totally dependant upon how you drive. see full Nissan Z review
2003 2dr Hatch 287-horsepower 3.5L V6
5-speed shiftable automatic RWD
You might not care about fuel economy in a sports car, but as my daily driver I spend about $200/mo in gas. see full Nissan Z review
2003 2dr Hatch 287-horsepower 3.5L V6
6-speed manual RWD
it can get low when driven the way its meant to be driven (under 20) but if your just cruising it can get about 27-28 see full Nissan Z 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