1985 Cadillac Fleetwood/DeVille (FWD)
4.3L 6-cyl · 4-speed automatic · FWD
DieselDieselLarge Cars
Official EPA record #1400 from FuelEconomy.gov · data 2026-07-26 · every assumption below is yours to edit. How this is computed
Per month
$228.10
Per year
$2,737
Per mile
22.8¢/mi
5-year total
$13,685
Driving mix55% city / 45% highway
$/gal
MPG
Your own average replaces the EPA laboratory values — never averaged together with them — and the driving-mix setting stops applying, because a figure you measured already contains your own mix.
Notes & official EPA estimate
533.6 gal of fuel / yeardiesel @ $5.13/galAt $6.13/gal: $272.57/mo
Official FuelEconomy.gov estimate: $3,400/year — assumes 15,000 miles/year and EPA price assumptions. The figures above use your inputs instead.
Compare with another vehiclePrices: EPA national averages, Jul 24, 2026 — override anytime.
At 12,000 miles per year (55% city / 45% highway) with EPA national-average prices ($5.13/gal diesel), this 1985 Cadillac Fleetwood/DeVille (FWD) costs about $228.10 per month in diesel — $2,737 per year, 22.8¢/mi, $13,685 over five years.Assumptions are editable below. Prices as of July 24, 2026 · EPA vehicle record #1400. EPA figures are laboratory estimates; real-world cost varies with driving conditions, weather, and where you buy energy.
Official EPA efficiency
| Measure | Value |
|---|---|
| City MPG | 19 |
| Highway MPG | 29 |
| Combined MPG | 23 |
Official EPA estimates
| Estimate | Value |
|---|---|
| Official annual fuel cost (15,000 mi/yr) | $3,400/yr |
| Tailpipe CO₂ | 443 g/mi |
| EPA smog rating | not published |
Source: U.S. EPA / DOE FuelEconomy.gov, vehicle record #1400 (record updated 2013-01-01). Snapshot processed 2026-07-26; page data last changed 2013-01-01.
Related configurations
Same year, same family