Tracking since June 18, 2026 (data through September 29, 2026)
5,419.5
tracked miles so far
5,419.5Total tracked miles
64.6%Electric driving
$
$497.51Total energy cost
¢
9.18¢Average energy cost per mile
Project-to-date driving mix
3,498.5 electric miles1,921.0 gas‑engine miles
Savings so far
(estimated)
$496.42 saved
49.9% lower energy cost
vs. the 2018 Pacifica benchmark through Tank #5
Tank #1 — June 18 to August 10, 2026
Driving
Electric driving1,668.7
Gas‑engine miles351.4
Total miles2,020.1
Electric share82.6%
Energy & charging
Gasoline purchased13.893 gal
Home charging total557.621 kWh
Public charging total59.699 kWh
Total charging617.320 kWh
Tank result
7.56¢
Energy cost per mile
$152.62 ÷ 2,020.1 miles
Heavy electric use held energy cost to 7.56¢ per mile — 57% below the 2018 Pacifica benchmark.
Total energy cost
Gasoline$50.00
Home charging$89.56
Public charging$13.06
TOTAL$152.62
Compared with 2018 Pacifica
$199.05 saved
57% lower energy cost
2018 benchmark: $351.67 total, or 17.41¢/mile, using 22 MPG and the Twin Cities gas-price benchmark for June 18–August 10.
Tank #1 context: Mostly local driving with frequent charging opportunities and a high electric share. One gasoline fill‑up covered the full 2,020.1‑mile tank period.
Tank history
Tank #2 — August 10 to August 12, 2026
Driving
Electric driving140.1
Gas‑engine miles382.1
Total miles522.2
Electric share26.8%
Energy & charging
Gasoline purchased15.329 gal
Home charging total16.298 kWh
Public charging total0 kWh
Total charging16.298 kWh
Tank result
11.80¢
Energy cost per mile
$61.62 ÷ 522.2 miles
Even with limited charging opportunities and mostly highway driving, Tank #2 still came in below the 2018 Pacifica benchmark.
Total energy cost
Gasoline$59.00
Home charging$2.62
Public charging$0.00
TOTAL$61.62
Compared with 2018 Pacifica
$34.28 saved
36% lower energy cost
2018 benchmark: $95.90 total, or 18.37¢/mile, using 22 MPG and the Twin Cities gas-price benchmark for August 10–12.
Tank #2 context: Longer drives, more highway miles, minimal charging on the road, and more regenerative braking closer to home as traffic, rolling hills, and town slowdowns increased.
Tank history
Tank #3 — August 12 to August 30, 2026
Driving
Electric driving666.5
Gas‑engine miles375.3
Total miles1,041.8
Electric share64.0%
Energy & charging
Gasoline purchased14.667 gal
Home charging total226.640 kWh
Public charging total0 kWh
Total charging226.640 kWh
Tank result
8.93¢
Energy cost per mile
$93.00 ÷ 1,041.8 miles
A 64.0% electric share kept energy cost to 8.93¢ per mile — 51.5% below the 2018 Pacifica benchmark.
Total energy cost
Gasoline$56.60
Home charging$36.40
Public charging$0.00
TOTAL$93.00
Compared with 2018 Pacifica
$98.79 saved
51.5% lower energy cost
2018 benchmark: $191.79 total, or 18.41¢/mile, using 22 MPG and the Twin Cities gas-price benchmark for August 12–30.
Tank #3 context: A mixed-use tank with regular home charging and no public charging. The period also included several higher-mileage day trips alongside normal local driving.
Tank history
Tank #4 — August 30 to September 13, 2026
Driving
Electric driving443.2
Gas‑engine miles409.0
Total miles852.2
Electric share52.0%
Energy & charging
Gasoline purchased15.247 gal
Home charging total122.888 kWh
Public charging total41.140 kWh
Total charging164.028 kWh
Tank result
10.57¢
Energy cost per mile
$90.07 ÷ 852.2 miles
A nearly even electric/gas split still held energy cost to 10.57¢ per mile — 43.3% below the 2018 Pacifica benchmark.
Total energy cost
Gasoline$64.02
Home charging$17.20
Public charging$8.85
TOTAL$90.07
Compared with 2018 Pacifica
$68.75 saved
43.3% lower energy cost
2018 benchmark: $158.82 total, or 18.64¢/mile, using 22 MPG and the Twin Cities gas-price benchmark for August 30–September 13.
Tank #4 context: EV-heavy local driving dominated the first part of the tank before a weekend road trip to Madison shifted the mix toward highway gasoline use. Public charging in Madison kept all 43 miles of local driving there electric.
Tank history
Tank #5 — September 13 to September 29, 2026
Driving
Electric driving580.0
Gas‑engine miles403.2
Total miles983.2
Electric share59.0%
Energy & charging
Gasoline purchased15.672 gal
Home charging total156.939 kWh
Public charging total46.578 kWh
Total charging203.517 kWh
Tank result
10.19¢
Energy cost per mile
$100.20 ÷ 983.2 miles
A 59.0% electric share held energy cost to 10.19¢ per mile — 48.8% below the 2018 Pacifica benchmark.
Total energy cost
Gasoline$65.02
Home charging$22.41
Public charging$12.77
TOTAL$100.20
Compared with 2018 Pacifica
$95.55 saved
48.8% lower energy cost
2018 benchmark: $195.75 total, or 19.91¢/mile, using 22 MPG and the Twin Cities gas-price benchmark for September 13–29.
Tank #5 context: A North Shore road trip combined long highway stretches with charging opportunities along the route, while local driving before the trip kept the tank majority-electric overall.
Tank history
Cumulative real‑world energy cost — Through Tank #5
Tank #1$152.62
Tank #2$61.62
Tank #3$93.00
Tank #4$90.07
Tank #5$100.20
TRACKED TOTAL$497.51
Average energy cost per mile
9.18¢
PHEV: $497.51 energy cost ÷ 5,419.5 tracked miles
The completed tanks now span plug-heavy local driving, road trips, mixed use, and a nearly even electric/gas split — showing how driving patterns and charging opportunities shape real-world energy cost.
Cumulative through Tank #5
Gasoline purchased
74.808 gal
Actual gasoline purchased across all five completed tanks.
Estimated 2018 gasoline
246.3 gal
Estimated gasoline a 2018 Pacifica at 22 MPG would have used across the same 5,419.5 miles.
Estimated gallons avoided
171.5 gal
Estimated difference between the 2018 benchmark and actual PHEV gasoline purchased.
Metric
2025 PHEV*
2018 Pacifica benchmark*
Tracked miles
5,419.5
5,419.5
Total energy cost
$497.51
$993.93†
Average energy cost per mile
9.18¢
18.34¢†
Gas fill‑ups
5
about 13
Difference
$496.42†saved
171.5†gallons avoidedvs. 2018
*2025 PHEV = actual pump + charging costs • 2018 Pacifica = 22 MPG at average $/gallon†Estimates
$496.42
saved through Tank #5
49.9%
lower energy cost
than the combined 2018 Pacifica benchmark across the same 5,419.5 miles.
Project to Date — Through Tank #5
The tanks so far have covered everything from plug‑heavy local driving to road trips and mixed-use driving. That contrast is exactly what the year‑long tracker is designed to capture.
5,419.5Tracked miles
64.6%Electric driving
$
$497.51Total energy cost
$496.42Estimated savings
Driving totals
Electric driving3,498.5
Gas‑engine miles1,921.0
Gasoline purchased74.808 gal
Average energy cost per mile$497.51 ÷ 5,419.5 miles9.18¢
Energy cost per mile by tank
2025 PHEV2018 Pacifica benchmark
2018 benchmark uses 22 MPG and the Twin Cities average gas-price benchmark for each tank period.
Tank board
Methodology
Gas
Actual gallons and dollars from each fill receipt are assigned to that tank.
Home charging
Home charging is valued using the recorded kWh and the applicable Xcel residential energy rate for the date of each charge.
Public charging
Paid public charging uses the actual session cost.
¢/mi
Energy cost per mile
Total energy cost (gasoline, home charging, and paid public charging) is divided by tracked miles.
2018 benchmark
The same miles are modeled at 22 MPG using the Twin Cities average gas-price benchmark for each tank period.
Seasonal electricity rates
When a tank overlaps Xcel rate seasons, home-charging cost is split by charge date so each session is valued at the rate in effect when it occurred.
What this project is measuring
The focus is operating energy cost: actual gasoline plus actual paid public charging plus home electricity valued at the applicable residential rate, compared with estimated operating costs for a 2018 Chrysler Pacifica.