CK Gas Check Log a tank
Cars

2023 Toyota Corolla

Bought May 26, 2023. Logged from Jun 11, 2023 to Sep 13, 2026 and still going.

51
Fill-ups
15,349
Miles
460
Gallons
$1,454
Spent on fuel
33.4
Average tank MPG
33.4 overall (miles / gallons)
$0.095
Cost per mile
$3.17
Average $ per gallon
12.7
Miles per day
23.6
Days between fills
median 22
9.02gal
Average fill

Maintenance counters

Since last oil change

6,168miles since May 24, 2025

Since last tires

3,793miles since Dec 7, 2025

MPG per tank

25303540202420252026median 33.5Tank MPG5-tank average
Each dot is one tank. The line is the trailing five-tank average; the dashed line is the median over all 51 tanks. Tanks under four gallons are still plotted but never count as a best or worst tank.

Price per gallon

$0.00$2.00$4.00202420252026average $3.17
Total paid divided by gallons pumped, one dot per fill-up.

Temperature and mileage

2530354040°50°60°70°80°
Each tank against the mean temperature over the days it was driven, at Atlanta. Fitted: +0.6 MPG per 10°F over 51 tanks, r = 0.35. Cold, under 50°F: 31.9 MPG (12 tanks). Mild, 50 to 75°F: 33.6 MPG (26 tanks). Warm, over 75°F: 34.4 MPG (13 tanks). Weather data by Open-Meteo.

Year by year

YearFill-upsMilesGallonsSpentAvg MPGAvg $ / galCost / mileMiles / dayDays between
2023 11 3,504 98.1 $321 35.9 $3.30 $0.092 16.3 19.5
2024 13 3,901 117.0 $367 33.4 $3.14 $0.094 11.0 27.4
2025 15 4,439 141.0 $412 31.5 $2.92 $0.093 12.2 24.3
2026 12 3,505 103.8 $355 33.7 $3.40 $0.101 13.0 22.5
All 51 15,349 459.9 $1,454 33.4 $3.17 $0.095 12.7 23.6

Avg MPG and Avg $ per gallon are means over tanks, the way the old spreadsheet summarized a year. Cost per mile and miles per day are ratios of the year's totals. A year with a car change counts only this car's tanks.

Seasons

SeasonTanksAvg MPGAvg $ / gal
Winter (Dec to Feb) 13 32.0 $2.85
Spring (Mar to May) 13 33.7 $3.35
Summer (Jun to Aug) 15 34.7 $3.40
Fall (Sep to Nov) 10 32.9 $3.02

Records

40.7MPG
Best tank
Aug 19, 2023, 240 mi
29.5MPG
Worst tank
May 4, 2025, 291 mi
374mi
Longest tank
Oct 22, 2023
$2.47
Cheapest gallon
Oct 5, 2024
$4.28
Priciest gallon
Aug 19, 2023
52days
Longest gap
ending Jul 12, 2024

Notes and maintenance

DateMiles on the carNote
Jul 12, 2023978oil changeBreak in oil change
Apr 2, 20245,087oil changeOil change
May 24, 20259,181oil changeOil change
Dec 7, 202511,556tiresTwo new tires

"Miles on the car" is the sum of tank miles since purchase, which is the odometer for the Corolla and a running total for the earlier cars.

Every tank

51 tanks
Date Miles Gallons Cost $ / gal MPG Days Notes
248 8.25 $32.36 $3.92 30.1 35
319 9.51 $36.13 $3.80 33.5 22
261 7.75 $28.67 $3.70 33.7 26
284 8.26 $28.91 $3.50 34.4 20
288 7.69 $27.68 $3.60 37.5 17
329 9.40 $37.03 $3.94 35.0 20
351 9.55 $34.81 $3.65 36.8 31
362 10.07 $36.84 $3.66 35.9 21
313 9.20 $29.89 $3.25 34.0 20
265 8.13 $21.62 $2.66 32.6 20
240 7.83 $19.58 $2.50 30.7 20
245 8.19 $21.45 $2.62 29.9 18
288 9.25 $25.81 $2.79 31.1 10
303 9.72 $27.72 $2.85 31.2 16 tiresTwo new tires
320 10.00 $26.39 $2.64 32.0 20
291 9.76 $27.34 $2.80 29.8 28
275 8.67 $24.88 $2.87 31.7 35
307 9.90 $29.54 $2.98 31.0 28
299 8.76 $26.10 $2.98 34.1 10
314 9.75 $26.33 $2.70 32.2 19
266 8.79 $25.92 $2.95 30.3 41
321 9.51 $28.33 $2.98 33.8 20 oil changeOil change
291 9.85 $29.47 $2.99 29.5 28
264 8.37 $26.37 $3.15 31.5 23
309 9.75 $29.85 $3.06 31.7 27
299 9.43 $29.60 $3.14 31.7 27
292 9.53 $28.28 $2.97 30.6 33
240 7.70 $22.80 $2.96 31.2 10
266 8.15 $23.32 $2.86 32.6 26
282 9.27 $26.88 $2.90 30.4 37
279 8.78 $21.68 $2.47 31.8 35
331 9.74 $28.64 $2.94 34.0 50
327 8.58 $35.25 $4.11 38.1 52
278 8.58 $29.09 $3.39 32.4 24
315 8.58 $30.17 $3.52 36.7 25
286 8.58 $28.32 $3.30 33.3 17 oil changeOil change
341 9.90 $33.75 $3.41 34.4 15
312 9.30 $30.31 $3.26 33.5 22
318 9.80 $28.85 $2.94 32.4 35
326 10.00 $27.54 $2.75 32.6 8
345 9.92 $28.18 $2.84 34.8 25
281 8.04 $25.23 $3.14 35.0 22
290 8.32 $23.29 $2.80 34.9 19
374 10.40 $31.95 $3.07 36.0 24
311 8.70 $27.14 $3.12 35.7 25
339 9.21 $33.53 $3.64 36.8 15
240 5.89 $25.22 $4.28 40.7 18
346 10.08 $37.31 $3.70 34.3 20
325 9.40 $30.71 $3.27 34.6 14 oil changeBreak in oil change
331 9.48 $29.76 $3.14 34.9 17
322 8.68 $28.56 $3.29 37.1 16