Post your Gas Mileage : Calculated

Round trip from Austin area - NE Dallas towing 5200~lbs, subcompact tractor w/ box blade, riding mower, plate compactor, about 150lbs in tools.

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'13 HONDA Fit Base : 1.5Ltr. (E.F.I.) w/ 5 speed auto . Driving Mix (Hwy/City) : 60/40 . Avg. Temp : 39 . Fill of winter blend Top Tier (?) 89 w/E10 .

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Start of NEW tank :

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2009 Pontiac Vibe 2.4L
295 miles / 11.53 gallons = 25.59MPG
Refilled with 93, just to see if VVT makes any timing changes to improve MPG.
Last 9 tanks of 87 also had a splash of MMO and total average is 27.2MPG.
 
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Filled up at Costco again . They were 48¢ less expensive than the recent price increase in this area. This tank is pure hybrid, easy highway and city driving in very warm weather. Even short trips were above 40 mpg. The truck really likes the Costco gas and the warmer weather.

47.5 MPG​

Details​

    • G/100mi: 2.10
    • Miles: 298.0
    • Gallons: 6.27
    • Price: $2.87/Gallon
    • Total: $17.97

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2003 Honda Civic EX

This tank included 194 miles of mostly highway driving, with the balance being short around-town commuting.
Total miles: 319.6
Total gals: 9.448
Tank MPG: 33.8

319.6 - 194 = 125.6 city miles. Typical MPG for city commuting is 30.0. So:
125.6 / 30.0 = 4.187 gals

9.448 - 4.187 = 5.261 gals used for those 194 highway miles
194 / 5.261 = 36.9 MPG for the highway portion of this tank.
 
1996 Saturn SW2
277.8 miles traveled
6.89 gallons to fill
40.31 tank mpg
This is the first 40 mpg tank I’ve ever had in the 3.5 years I’ve owned this car. I commute not quite 50 miles round trip every day Monday-Friday and fill up at the same station every Friday on my way home after work. I put a half can of Seafoam in each of the last 2 tanks. My usual tank average is 35-37 in the winter and 37 to 39 in the summer
 
'13 HONDA Fit : 1.5 Ltr. (E.F.I.) w/ 5 speed auto : Driving Mix ( Hwy/City ): 65/35 . Avg. Temp : 40 . Fill of winter blend Top Tier (?) 89 w/E10 .

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Start of NEW tank :

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'13 HONDA Fit base : 1.5 Ltr. (E.F.I.) w/ 5 speed auto : Driving Mix (Hwy/City) : 65/35 . Avg. Temp : 42 . Tires : 4 GENERAL Altimax RT43(H) installed @ 33.5 P.S.I.. Oil/Filter : PENNZOIL Platinum 0w-20 ( S.P.,GF-6A ) w/ MOBIL1 M1-110A . Fill of winter blend Top Tier (?) 89 w/E10

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NEW tank :

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