I drive a 2003 Focus ZX 2.0 Zetec DOHC, with a 5-speed trany.
I drive pretty much all highway,
I set the cruise at 65mph (always)
I drive 50 miles round trip five days a week (we drive the wifes mini van on weekends).
I bought the car used a couple of months ago and I was figuring on around 32 to 34mpg. When I bought the car I got around 25 to 26mpg. So I starting working on tuning it up, so I replaced,
Spark plugs,
plug wires,
fuel filter,
air filter,
PCV valve,
Changed oil and oil filter (5W-20)
Changed trany oil, Ford Synthetic manual trany oil,
Crank case vent filter,
Tried a couple of tanks of gas with gumout injector cleaner,
I've tried and tracked 10 FULL tanks of fuel, I ran each tank from full to at lest the low fuel light came on.
So, to say the lest I'm not happy with the fuel mileage. My old Taurus got 25mpg, it had EVERYTHING! V-6, PS/PB/AC/ DOHC, climate control/ ect... So I buy a compact with the thinking I could get better gas mileage for a work car??
Tank #1
Exxon (87) (little general)
307 miles,
10.4 gallons,
29.5mpg
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Tank #2
Exxon (87) (little general)
308 miles,
11.5 gallons,
26.7 mpg
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Tank #3
Exxon (87) (little general)
278 miles,
10.4 gallons,
26.7 mpg
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Tank #4
Speedway (87)
294.5 miles,
11.2 gallons,
26.2 mpg
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Tank #5
Exxon (87) (Milton Interstate Exxon)
271.7 miles,
10.0 gallons,
27.17 mpg
"Note to this tank of fuel,
I changed the fuel filter and lost some fuel during the change"
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Tank #6
Exxon (87) (Milton Interstate Exxon)
304 miles
11.1 gallons,
27.4 mpg
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Tank #7
BP (87)
350.8 miles,
12.1 gallons,
28.99 mpg
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Tank #8
BP (87)
312.8 miles,
11.4 gallons,
27.43 mpg
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Tank #9
Gomart (89) (29th street Gomart)
302.5 miles,
10.77 gallons,
28.08 mpg
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I'm running the tenth tank of fuel in the car right now!
Gomart (89) (29th street Gomart)
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2729.7 miles
98.87 gallons
27.6 mpg Average (highway mileage)