2017-09-16 461 9.37 $2.5 49.2 "First fill. Mostly commuting, with highway miles on the cruise control at 59 mph. Dash display showed 49.9 miles per gallon, a much smaller error than my other hybrid."
2017-09-28 486 9.49 51.21 ""
2017-10-01 215 4.512 47.65 ""
2017-10-14 444 9.25 48 ""
2017-10-18 397 8.73 $2.16 45.48 "Lots of cruising around in the Smoky Mountains on this tank."
2017-10-23 450 8.99 $2.18 50.06 ""
2017-11-03 406.2 9.06 $2.3 44.83 "Lots of commuting. Getting above-EPA results in this car is VERY difficult, so many of the controls are automated and the driver's range of options is limited."
2017-11-08 449.1 8.91 $2.4 50.4 "First time the HUD showed a lower number than the actual mileage: 50.1 reported on the dash."
2017-11-23 340.9 8.029 $2.26 42.46 "Commuting"
2017-11-30 399.8 7.97 $2.4 50.16 "Commuting. The Prius has a very small tank."
2017-12-04 405.8 8.73 $2.1 46.48 "Commuting."
2017-12-28 385.2 9.17 $2.16 42.01 "A small driveway mishap damaged one of the underbody panels. It had been damaged before we got the car but now it needs to be replaced. New one is on the way."
2017-12-30 167.8 3.292 $2.29 50.97 "Several trips with the car completely full of people."
2018-01-08 330.2 6.79 $2.29 48.63 "Added smoothie wheel discs at all four corners. First trip, one disc came off after about five miles. The others are still on."
2018-01-13 357.7 6.96 $2.29 51.39 "Made a new smoothie to replace the one that came off. Added spacers under all the attachment points to prevent the attachment pulling the trim ring fingers in and making them loose. Appears to be holding okay now."
2018-01-19 329 6.89 47.75 ""
2018-01-21 240.1 5.82 $2.36 41.25 ""
2018-01-26 403.4 8.6 $2.2 46.91 ""
2018-02-07 275.1 5.93 $2.36 46.39 ""
2018-02-10 258.7 5.13 $2.35 50.43 ""
2018-02-15 384.6 8.38 $2.28 45.89 ""
2018-02-21 438.6 8.75 $2.14 50.13 "Lots of commuting. One of the smoothie wheel discs has failed, but I heard it coming loose before it parted company. I'll have to do the spacers in something besides wood."
2018-02-24 450.3 9.06 $2.26 49.7 ""
2018-03-01 422.2 8.045 $2.2 52.48 ""
2018-03-11 231.8 5 $2.23 46.36 ""
2018-03-20 463 8.15 $2.36 56.81 ""
2018-03-24 333.3 6.44 $2.46 51.75 ""
2018-03-28 363.4 7.25 $2.46 50.12 ""
2018-04-13 467.9 9.03 $2.3 51.82 ""
2018-04-18 390.6 7.4 $2.4 52.78 "This tank I filled with premium, 93 octane. I may do a few tanks with higher octane fuel to see if it makes a difference. Warming weather may skew the results, however."
2018-04-21 261.1 5.22 $2.6 50.02 ""
2018-05-01 403.8 8 $2.36 50.48 ""
2018-05-06 299 5.362 $2.9 55.76 "Wow!"
2018-05-12 509.8 9.58 $2.44 53.22 ""
2018-05-16 322.9 6.35 $3.45 50.85 ""
2018-05-21 350.9 7 50.13 ""
2018-06-03 406.1 8.01 $2.44 50.7 ""
2018-06-13 296.8 7.9 37.57 "OUCH"
2018-06-19 429 9.4 45.64 "OUCH again! Dang the AC use really hammers on this car."
2018-06-21 495.5 9.59 51.67 ""
2018-06-25 509.4 9.9 51.45 "It's an uncommon tank to go over 500 miles. One long tank from Charleston SC to Knoxville TN"
2018-06-30 406.5 8.14 $2.44 49.94 "Commuting. Lots of rain this week, and the HUD reported only 47.4 mpg."
2018-07-06 389.4 9.187 $2.45 42.39 "The Prius is really good in the shoulders of the year, but when it gets hot the AC use drives the fuel economy through the floor.
And occasionally Sweetie will sit in the car with the air on while waiting for me, and that isn't helping things at all."
2018-07-10 308.3 6.03 $2.46 51.13 ""
2018-07-14 440.3 10 $2.66 44.03 "Sweetie's effects on the fuel economy are bad enough, but this tank even includes a stakeout, tracking an employee who was misusing company vehicles and lolligagging on the clock. She sat in one spot for nearly an hour with the air on."
2018-07-19 402.7 8.611 $2.44 46.77 ""
2018-07-27 443.6 9.12 $2.44 48.64 ""
2018-08-07 423.7 8.91 $2.54 47.55 ""
2018-08-14 329 6.136 $2.44 53.62 "Commuting"
2018-08-19 374.2 7.34 $2.44 50.98 ""
2018-08-24 412.4 8.57 $2.58 48.12 ""
2018-08-29 328.1 6.96 $2.3 47.14 ""
2018-09-03 302.9 6.414 $2.54 47.22 ""
2018-09-09 467.8 8.81 53.1 "Today is exactly one year since I first bought the car. I've got to say, I'm REALLY stoked about EV mode whenever I can get it to engage. I only get a mile or so at a time, but humming along (literally humming) with no ICE sound is pretty awesome."
2018-09-25 486.4 9.722 50.03 ""
2018-09-30 302.5 5.94 $2.66 50.93 ""
2018-10-04 348.9 6.72 $2.66 51.92 ""
2018-10-17 314.2 6.08 $2.66 51.68 ""
2018-10-21 210.9 4.179 $2.659 50.47 "Commuting."
2018-11-08 407.2 7.11 $2.58 57.27 "I'm pretty sure this is the result of some kind of error, a filling error probably."
2018-11-13 387.3 9.01 $2.52 42.99 "Mm-hm. There it is. That's the correction I expect."
2018-12-02 431.3 8 53.91 ""
2018-12-08 368.2 8.44 $1.94 43.63 ""
2018-12-08 368.2 8.43 $1.94 43.68 ""
2018-12-16 392.9 8.69 $1.82 45.21 ""
2018-12-30 340.9 8.26 $1.9 41.27 "I don't know if it's cold weather or something else, but these low numbers have really got me down."
2019-01-07 412.4 8.11 $1.89 50.85 "Tire pressure had been low. Oops."
2019-01-14 382 7.44 $1.9 51.34 ""
2019-01-19 376.8 8.74 $1.96 43.11 "I think I have a low tire again. New Ecopia EP422 are on the way."
2019-01-22 325.1 6.35 $1.99 51.2 "Commuting. Very cold at fill up, I think the cold has stiffened the fuel tank bladder and this may be a short fill."
2019-01-27 296.4 6.94 $2.02 42.71 "New tires went on yesterday."
2019-02-02 397.3 8.37 47.47 ""
2019-02-08 430.6 8 $1.99 53.83 ""
2019-02-18 383.2 8.04 $2.1 47.66 ""
2019-02-27 284.4 6.3 $2.6 45.14 "Lots and lots of rain ."
2019-03-04 353 7.7 $2.2 45.84 ""
2019-03-11 358.9 7.49 $2.3 47.92 ""
2019-03-15 307.3 6.19 49.64 ""
2019-03-23 360.4 7.55 $2.4 47.74 "Persistent slow leak in RR tire. Gotta get that fixed."
2019-04-04 381.3 8.03 $2.46 47.48 ""
2019-04-23 295.3 5.38 54.89 "I think this is somehow a mistake but I can't find where I went wrong..."
2019-04-29 505.3 9.91 $2.63 50.99 "This is with me piling in as much fuel as I could get it to hold, trying to offset any kind of weirdness from the previous tank."
2019-05-07 434.5 8.85 49.1 ""
2019-05-15 426.9 8.71 $2.6 49.01 ""
2019-05-23 427 8.62 49.54 ""
2019-05-28 260.9 5.55 $2.49 47.01 ""
2019-06-10 470.3 9.3 $2.5 50.57 ""
2019-06-15 350.7 6.784 51.7 ""
2019-06-21 486.2 9.88 49.21 ""
2019-06-28 433.1 8.5 50.95 ""
2019-07-06 425 9.24 46 ""
2019-07-28 303.3 6.09 $2.48 49.8 ""
2019-08-01 426.6 9.09 $2.48 46.93 "Includes a trip into the Smokies, climbing to Cherokee NC (don't ever go there), then up to Clingman's Dome (absolutely go there!). 90 degrees in Pigeon Forge, 63 on the mountain."
2019-08-06 414.3 7.83 52.91 ""
2019-08-12 441.3 8.48 $2.36 52.04 ""
2019-08-17 377.9 8.41 44.93 ""
2019-08-24 444.3 8.61 51.6 ""
2019-09-06 489.4 9.71 50.4 ""
2019-09-09 437.7 8.51 $2.26 51.43 "Includes cruising from Knoxville to Nashville TN for the TN State Fair. Cruise control set to 65, AC on.

NOTE: the TN State Fair is not worth your time."
2019-09-23 741.7 14.88 49.85 "Includes a partial fill."
2019-09-30 411.6 8.44 48.77 ""
2019-10-07 329 6.247 $2.36 52.67 "Commuting."
2019-10-10 282 5.13 $2.3 54.97 "Commuting"
2019-10-22 372.6 7.45 50.01 ""
2019-10-29 393.9 7.85 $2.16 50.18 ""
2019-11-05 372.9 7.562 $2.4 49.31 ""
2019-11-11 317.5 6.32 $2.2 50.24 ""
2019-11-24 394 7.9 $2.3 49.87 ""
2019-11-27 396 8.45 46.86 ""
2019-12-05 347.9 7.2 $2.3 48.32 "Cold weather kills mpgs. Grumble."
2019-12-11 414.3 8.5 48.74 "Includes 60 miles of driving through slush."
2019-12-23 289.4 7 $2.55 41.34 ""
2020-01-05 410.2 8 $2.499 51.28 ""
2020-01-15 365.7 7.275 50.27 ""
2020-01-20 355.4 7.24 49.09 ""
2020-01-23 294.5 7 42.07 ""
2020-01-30 391.8 7.97 49.16 ""
2020-02-06 357.1 7.36 $2.26 48.52 ""
2020-02-10 286.1 6.17 $2.24 46.37 ""
2020-02-17 345.7 7.76 $2.2 44.55 ""
2020-02-24 353.9 7.13 $2.2 49.64 ""
2020-02-28 372.6 8.03 46.4 ""
2020-03-03 375.4 8.5 44.16 ""
2020-03-09 334 6.27 53.27 ""
2020-03-12 161.5 3 53.83 ""
2020-03-16 191.7 3.34 57.4 "Shorter fills for a while during the viral outbreak. Sweetie wants us to keep a deeper reserve on hand. How that is supposed to help in an emergency I'm not sure, but there it is. For the sake of domestic tranquility, I'm going along with it."
2020-03-27 203.3 4.06 $1.55 50.07 ""
2020-04-10 221 4.07 $1.7 54.3 "Shorter tanks during the pandemic crisis."
2020-04-21 205.5 3.805 54.01 ""
2020-04-26 208.6 3.95 $1.6 52.81 ""
2020-05-05 272 5.195 52.36 ""
2020-05-11 219 3.879 $1.8 56.46 ""
2020-05-18 354.2 7.22 $1.8 49.06 ""
2020-05-23 232.3 4.73 49.11 ""
2020-05-29 272.4 4.74 $1.66 57.47 ""
2020-06-02 204.3 4.15 49.23 ""
2020-06-07 204.8 3.91 52.38 ""
2020-06-12 334 6.62 50.45 ""
2020-06-19 207.3 4.45 46.58 ""
2020-06-22 466.1 8.52 54.71 ""
2020-06-27 221.8 4 $2.16 55.45 "I'm using higher octane fuel since about three tanks ago, I wonder if that's part of why the numbers are better."
2020-07-01 199.8 3.83 $1.96 52.17 ""
2020-07-04 268.1 5.69 $2.7 47.12 ""
2020-07-13 323 6.33 $2.16 51.03 ""
2020-07-18 390.1 8.29 $1.96 47.06 ""
2020-07-21 240.1 4.87 $2.2 49.3 ""
2020-07-25 289 5.1 $2.19 56.67 ""
2020-08-18 233.6 4.8 $2.1 48.67 ""
2020-08-22 207.4 3.91 $2.35 53.04 ""
2020-09-12 276.9 5 $1.999 55.38 ""
2020-09-16 210.7 4.03 $2.1 52.28 "Three years to the day since I filled the car up for the first time."
2020-09-22 253.9 4.94 $1.74 51.4 ""
2020-09-25 204.1 4.33 $2.7 47.14 ""
2020-10-01 303.9 6.01 50.57 ""
2020-10-07 206 4.019 $2.7 51.26 ""
2020-10-13 269.7 5.02 53.73 ""
2020-10-18 261.6 5 $2.2 52.32 "Mostly a long trip this weekend, about 90 miles each way."
2020-10-26 209.6 3.49 $1.9 60.06 "I have NO idea what I did to get this result."
2020-11-05 303.1 6.03 $1.9 50.27 "New tires on the rear about halfway through this tank."
2020-11-10 256.3 5.3 $1.86 48.36 ""
2020-11-16 216.2 4.2 $1.86 51.48 ""
2020-11-21 268.7 5.6 $1.88 47.98 ""
2020-11-25 200.1 4.26 $1.86 46.97 ""
2020-11-30 220.3 4.24 51.96 ""
2020-12-06 329.7 7.06 $2.5 46.7 ""
2020-12-11 224.3 3.96 $2.15 56.64 ""
2020-12-22 225 4.11 $2.1 54.74 ""
2021-01-06 299.5 6.99 $2.11 42.85 ""
2021-01-27 196 4.05 $2.29 48.4 ""
2021-02-10 250.7 5.63 $2.3 44.53 ""
2021-02-13 252.7 5.5 $2.53 45.95 ""
2021-02-15 193.8 4.43 $2.26 43.75 ""
2021-02-26 284.9 5.8 $3.3 49.12 ""
2021-03-05 211.1 4.22 $2.55 50.02 ""
2021-03-21 230.8 4.7 $2.6 49.11 ""
2021-04-12 343.3 6.28 $2.73 54.67 "Long day trip Knoxville TN to Asheville NC"
2021-04-26 214.1 4.33 $2.59 49.45 ""
2021-04-29 233.7 4.52 $2.75 51.7 ""
2021-05-15 212.5 4.02 $2.9 52.86 ""
2021-05-29 303 6.04 $2.9 50.17 ""
2021-06-05 169.2 3.15 53.71 ""
2021-06-09 157.2 3.03 $2.9 51.88 ""
2021-06-29 207.9 4.37 $3.66 47.57 ""
2021-07-08 257.3 3.89 $2.9 66.14 "This fill is modified by a very wonky fill in Gatlinburg TN, where an incredibly slow pump 1) failed to stop and so filled up the filler neck after 2) filling up the evaporative canister, I think. Nothing else explains the incredibly poor mileage that that fill yielded."
2021-07-11 267.2 4.68 $2.9 57.09 ""
2021-07-15 202.1 4.037 $3.7 50.06 ""
2021-08-07 219.1 4.165 $2.899 52.61 ""
2021-08-16 351.8 6.988 $3.4 50.34 ""
2021-09-21 272.2 5.23 $2.9 52.05 ""
2021-11-03 209 3.99 52.38 ""
2021-11-09 288.9 6.5 $3.08 44.45 ""
2021-11-15 227.6 4.72 $3.18 48.22 ""
2021-12-22 199 4.12 $2.96 48.3 "Cold weather, some car warmups to defrost the windshield."
2022-01-10 259 5.98 $3.26 43.31 ""
2022-01-13 217.1 4.16 $2.9 52.19 ""
2022-03-02 318.1 6.4 $3.5 49.7 ""
2022-03-18 317 6.97 $4.16 45.48 ""
2022-04-05 223.6 4.3 52 ""
2022-04-09 197.8 3.96 49.95 ""
2022-04-11 301.8 6.39 47.23 ""
2022-04-15 245.9 5 49.18 ""
2022-04-20 214.7 3.97 54.08 ""
2022-04-23 202.5 3.87 $3.62 52.33 ""
2022-04-23 246.3 4.97 49.56 ""
2022-04-23 202.5 3.87 52.33 ""
2022-04-27 179.5 3.49 51.43 ""
2022-05-02 228.1 4.47 51.03 ""
2022-05-09 360.8 7.01 $4.45 51.47 ""
2022-05-12 217.2 4.26 $4.19 50.99 ""
2022-06-01 167.4 2.87 58.33 ""
2022-06-04 151 3 $4.8 50.33 ""
2022-06-07 252.1 5 $4.8 50.42 ""
2022-06-27 192.5 3.78 $4.8 50.93 ""
2022-07-07 163.7 3.37 48.58 ""
2022-07-16 238.6 4.5 $4.26 53.02 ""
2022-07-25 191.3 3.5 $4.1 54.66 ""
2022-08-02 278.2 5.02 $4.2 55.42 ""
2022-08-16 209 3.92 53.32 "Commuting, commuting, commuting. Lots of AC use."
2022-09-06 309.9 6.5 $3.36 47.68 ""
2022-09-23 321.4 6.16 $3.9 52.18 "All highway."
2022-09-24 325.6 5.29 $3.2 61.55 ""
2022-10-12 212.5 4.12 51.58 ""
2022-10-17 250 5.13 $3.45 48.73 "Odo is an estimate and probably low, I had the dreaded instrument cluster failure and tried to keep track with a phone app odometer. And now the center stack display has failed too!"
2023-04-03 282.9 5.78 $3.46 48.94 ""
2023-05-23 374.9 7.12 $2.94 52.65 ""
2023-05-29 389.9 8.5 $3.09 45.87 "Replaced the instrument cluster. Center MFD still acting up."
2023-06-05 402.2 8.46 $3.18 47.54 ""
2023-06-28 425.7 8.53 49.91 ""
2023-07-11 408.6 8.97 $2.9 45.55 ""
2023-07-23 402.4 7.24 $3.04 55.58 ""
2024-02-27 285.1 5.5 51.84 ""
2024-03-04 313.2 6.83 $2.74 45.86 ""
2024-03-11 370 7.43 $2.8 49.8 ""
2024-03-20 367.7 7.5 $3.1 49.03 ""