Every tank for 2 years tracked - real world MPG analysis

[hemlockz]

It's been 2 years already, and 44 tanks of gas. How close was the EPA estimate to my real-world mileage? (Pretty damn close)

• 6-speed manual transmission
• kept it in "normal" mode (no eco/sport)
• city-dweller
• occasional road trips
• off-roading about 10 times
• 92 octane / top tier gasoline only

Overall MPG (Tire-Corrected) - 19.0 MPG Combined
Using the correction from 265/70R17 → 285/70R17 (+3.49% diameter):

Metric	Value
Total Fill-ups	44
Total Miles (odometer)	12,523 mi
Total Miles (corrected)	12,925 mi
Total Gallons	685.18 gal
Total Fuel Cost	$2,843.82
Overall MPG (weighted)	18.99 MPG
Average Fuel Price	$4.15/gal
Fuel Cost per Mile	$0.225/mi
Summer Blend MPG	19.97 MPG
Winter Blend MPG	18.48 MPG
Summer Advantage (fewer short trips, and different fuel blends)	+1.49 MPG (+8.1%)

My best tank was 22.4 with tire size correction. (This was all freeway, 6th gear driving with a fully loaded truck of gear and passengers though.)

Raw Data (raw is not corrected for tire size)

Date	Odometer	Gallons	Cost	MPG	Station
9/14/2024​	342​	16.99​	67.26​	20.0​	Chevron
9/27/2024​	591​	13.60​	53.83​	18.3​	Chevron
10/4/2024​	900​	16.30​	53.61​	19.0​	Chevron
10/29/2024​	1183​	15.60​	56.29​	18.1​	Chevron
11/10/2024​	1472​	16.54​	62.01​	17.5​	Chevron
11/22/2024​	1746​	15.34​	55.98​	17.9​	Chevron
11/29/2024​	2046​	16.01​	54.41​	18.7​	Space Age
12/7/2024​	2320​	16.80​	53.76​	16.3​	Fred Meyer 92 + Techron
12/21/2024​	2567​	15.61​	45.35​	15.8​	Fred Meyer 92
1/4/2025​	2859​	15.97​	47.89​	18.3​	Chevron 92
1/19/2025​	3161​	16.12​	62.06​	18.7​	Fred Meyer 92
2/15/2025​	3416​	15.26​	59.50​	16.6​	Chevron 92
3/9/2025​	3709​	16.09​	72.05​	18.3​	VP Racing 92
3/29/2025​	3995​	15.38​	56.29​	18.6​	Fred Meyer 92
4/16/2025​	4277​	15.50​	61.99​	18.2​	Fred Meyer 92
4/28/2025​	4590​	16.14​	62.13​	19.2​	Chevron 92
5/17/2025​	4864​	15.31​	60.74​	19.5​	Fred Meyer 92
6/1/2025​	5182​	16.33​	60.42​	20.6​	Fred Meyer 92
7/4/2025​	5515​	17.04​	61.35​	20.3​	Chevron 92
7/13/2025​	5857​	16.59​	71.30​	20.6​	Chevron 92
7/31/2025​	6074​	10.61​	50.13​	20.3​	Chevron 92
8/8/2025​	6370​	15.17​	60.65​	19.5​	Chevron 92
8/14/2025​	6626​	11.83​	50.39​	21.6​	Chevron 92
8/16/2025​	6917​	14.61​	56.96​	19.9​	Fred Meyer 92
8/19/2025​	7247​	17.09​	61.49​	19.3​	Fred Meyer 92
8/31/2025​	7557​	16.55​	76.69​	18.7​	Chevron 92
9/26/2025​	7786​	13.57​	62.99​	16.9​	Fred Meyer 92
10/10/2025​	8050​	13.64​	64.09​	19.4​	Fred Meyer 92
10/17/2025​	8347​	15.41​	71.49​	19.3​	Chevron 92
11/16/2025​	8601​	16.10​	68.32​	15.8​	Chevron 92
11/29/2025​	8915​	16.47​	73.89​	19.1​	Chevron 92
12/20/2025​	9177​	15.37​	62.08​	17.0​	Fred Meyer 92
1/8/2026​	9468​	15.92​	47.74​	18.3​	Chevron 92
1/29/2026​	9751​	16.01​	60.02​	17.7​	Chevron 92
3/1/2026​	10012​	16.70​	78.48​	15.6​	Fred Meyer 92 + Techron
3/20/2026​	10295​	15.30​	79.48​	18.5​	Fred Meyer 92
4/6/2026​	10585​	15.80​	82.25​	18.3​	Chevron 92
5/7/2026​	10833​	15.30​	70.00​	16.3​	Chevron 92
5/24/2026​	11086​	15.00​	91.53​	16.9​	Fred Meyer 92
6/14/2026​	11365​	16.27​	84.56​	17.1​	Fred Meyer 92
6/29/2026​	11658​	16.24​	73.05​	18.0​	Shell 92
7/18/2026​	11950​	16.20​	83.26​	18.0​	Chevron 92
8/1/2026​	12246​	16.00​	82.56​	18.5​	Fred Meyer 92
8/20/2026​	12523​	15.50​	73.50​	17.9​	Fred Meyer 92

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[MrB4D]

Great work!

I will post my results around Oct 4th (my 2 year mark)

 

[O.Hernandez]

Very informative and detailed I don't even want to look at what I spent on gas in the past year

 

[aaudiholic]

Now that your study is over put it in Sport.

 

[Sagebrush]

I beat you on mileage and total spent. Ouch.

I can't wait to go fuel up with these prices.

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