Liniment Formulae

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THE 2023 MILEAGE REPORT: Introduction

Here it is, dummies. It’s the big one: Poor Hartnett’s Almanack of Annual Mileage Reporting, Bird Migration Forecasts, Liniment Formulae & Homeric Fan Fiction, 17th Edition.

Our two vehicles in 2023:

  • 2022 Tesla Model Y Performance, a battery electric compact crossover with a 75-ish kilowatt hour lithium-ion battery pack that can travel roughly 300 local miles or 250 highway miles on a full charge and accelerate from 0 to 60 mph faster than nearly every production car you’ve ever seen with your own eyeballs and still top 120 MPGe while carrying a family of four and all of their junk on a three-week, 4,400-mile road trip with the AC blasting.
  • 2013 Nissan Leaf S, a battery electric compact five-door hatchback with a 24 kilowatt hour lithium-ion battery pack that can travel around 65 miles on a full charge.

How much did charging our cars add to our home electricity use? It accounted for 1.66 MWh out of a total 12.13 MWh, about 13.7 percent.

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THE 2023 MILEAGE REPORT: Miles per gallon gasoline equivalent

The top chart shows miles per gallon from mid-2001 through the end of 2023 for all seven cars in the dataset. The other chart focuses only on our current vehicles. We sold the Jetta in September 2012 and the Rio was totaled in an accident in February 2016. Our first 2013 Leaf was totaled in an accident in August 2019, and the nearly identical 2013 Leaf that replaced it was totaled in an accident a mere 34 days later in October 2019. We replaced it with yet another nearly identical 2013 Leaf, so here and throughout the rest of this year’s report all three 2013 Leafs are treated as a single vehicle for the sake of simplicity. We sold the C-Max in February 2022, and picked up the Model Y in March 2022.

Figures for the Jetta and Rio, both old-fashioned gasoline-burning internal-combustion engine cars, were recorded on a per-tank basis. Due to the more frequent, often daily nature of plug-in vehicle charging compared to gas station fill-ups, figures for the Leaf, C-Max, and Model Y are recorded on a weekly basis. Fuel economy for the Leaf, C-Max, and Model Y are shown as miles per gallon gasoline equivalent, or MPGe, an EPA metric that allows the energy consumption of plugin and non-plugin vehicles to be compared. The C-Max’s efficiency figures take into account both electricity and gasoline consumption.

The Model Y’s overall MPGe in 2023 was 123, up 1 percent from 2022. The weekly low and high MPGe were 111.2 and 156.7, respectively.

The Leaf’s overall MPGe in 2022 was 141, down 2.6 percent from 2022. The weekly low and high MPGe were 107.8 and 158.4, respectively.

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THE 2023 MILEAGE REPORT: Electricity, gasoline, and combined energy consumption

We consumed 2,844 kilowatt hours of electricity and burned 0 gallons of gasoline driving in 2023. Our energy use was down 35 percent on 22 percent fewer miles driven compared to 2022.

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THE 2023 MILEAGE REPORT: Electricity, gasoline, and combined energy costs

We spent a total of $469.87 on automotive electricity in 2023, 31 percent less than 2022 while driving 24 percent fewer miles. Gasoline costs were $0.00 for 0 gallons. Electricity cost $398.32 for the Model Y and $71.55 for the Leaf. Combined energy cost per mile was $0.05, down 22 percent from 2022.

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THE 2023 MILEAGE REPORT: Energy cost per mile

Taking only the price of electricity into account, the Model Y cost $398.32 to operate in 2023, or $0.054 per mile. Electricity for the Leaf cost $71.55, or $0.029 per mile. 

The first chart above shows the complete cost per mile dataset, and the second focuses only on our current vehicles.

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THE 2023 MILEAGE REPORT: Miles per day

We drove the Model Y an average of 20.2 miles per day in 2023, and the Leaf 6.9 miles per day. The first chart above shows the complete average daily mileage in the dataset, and the second focuses only on our current-as-of 2023 vehicles. Jetta and Rio averages, in blue and red, are per tank of fuel, while electrified vehicle averages are by week.

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THE 2023 MILEAGE REPORT: Electricity by source

We used 1,666.4 kWh of electricity from a single 120-volt outlet in our garage at home in 2023, 58.6 percent of the total. A further 680 kWh, or 23.9 percent, came from Tesla Superchargers, while 414.5 kWh were from various free sources, accounting for 14.6 percent of the total. The remaining 82.6 kWh, 2.9 percent, came from assorted other paid sources.

A Reddit comment on the price of things such as ketchup and regular unleaded gasoline


The cost of ketchup has come up in these comments more than I would have expected, so I am pleased to report that I paid the reasonable-ish sum of $2.98 for a 64-oz bottle of Great Value tomato ketchup at my local Walmart in Atlanta on Wednesday, Nov. 8, 2023. If you’ve been sitting on the sidelines of the ketchup market for the past few years, now might be a good time to consider getting back in the game.

Admittedly, that is 15% more than the $2.52 I paid for the identical item at the selfsame Walmart on Thursday, Jan. 7, 2021, but when one partakes in ketchup as I frequently as I apparently do, one finds that this very specific inflationary trend has gone unnoticed by oneself until one consults one’s meticulous, eccentric purchasing records. (One’s combined household earnings, it should be noted, are also up by more than 15% during this same interval due to hard work, good fortune, and an off-the-books arrangement by which the Biden family personally funnels a small but not insignificant share of the proceeds from their many and various tomato-based investments directly into my many and various bank accounts.)

In non tomato-based anecdata, and speaking of one’s meticulous, eccentric purchasing records, I noted this weekend that regular unleaded is back under $3/gallon in my area. This of course reminded me of the many dramatic ups and downs in fuel prices since I started recording such things on Wednesday, Aug. 24, 2005. On that day in Florida I purchased 12.9 gallons at $2.659/gallon, or about $4.17 in current money. A mere 1,062 days and 56 fill-ups later, on Monday, July 21, 2008, I purchased the most expensive fuel in my records, 13.2 gallons at $4.499/gallon in Palm Beach County, Florida, or about $6.30 in current dollars. Cheapest was $1.569 ($2.04 adjusted) on Thursday, Jan. 28, 2016 in DeKalb County, Georgia.

Let me know if you need some ketchup or unleaded.