The Isuzu NPR-HD does 16.2 mpg combined (14.4 city, 19.1 highway), which works out to about $2,370 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2.2L 4-cyl does 19 mpg while 5.3L 8-cyl does 15.5 — a difference of $456 a year. Against other V6 cars it sits below the average of 19.8 mpg.
Every Isuzu NPR-HD engine, compared
Picking the right version of the same car often saves more fuel than picking a different car altogether. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.2L 4-cyl | 18 / 21 | 2000–2000 | $2,021 | |
| 4.3L 6-cyl | 15 / 20 | 2001–2001 | $2,259 | |
| 3.2L 6-cyl | 14 / 18 | 2000–2000 | $2,400 | |
| 3.5L 6-cyl | 14 / 19 | 2002–2002 | $2,400 | |
| 4.2L 6-cyl | 13.8 / 19.3 | 2003–2009 | $2,430 | |
| 5.3L 8-cyl | 14 / 18 | 2003–2004 | $2,477 |
What that actually costs
Miles per gallon is an abstraction; the fuel bill is not. Here it is in money, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Cost per mile | $0.198 |
| Fuel per year | $2,370 |
| Fuel over five years | $11,850 |
| Against other V6 cars | +$431 a year |
| EPA's own estimate | $3,865 a year |
City or highway — who is this car for
The gap between city and highway figures tells you whom the car suits. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 14.4 mpg | $2,667 a year if you only drive in town |
| Highway | 19.1 mpg | $2,010 a year if you mostly commute |
| Gap | +4.7 mpg (33%) | Wide — this car dislikes traffic |
How the NPR-HD changed over the years
Combined figure by model year. Jumps usually mark a new generation or a new engine; dips often mean a heavier body or added all-wheel drive.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2009 | 14 / 20 | 1 | $2,400 | |
| 2005 | 14 / 20 | 1 | $2,400 | |
| 2004 | 13.5 / 18 | 2 | $2,477 | |
| 2003 | 14 / 18.5 | 2 | $2,477 | |
| 2002 | 14 / 19 | 1 | $2,400 | |
| 2001 | 15 / 20 | 1 | $2,259 | |
| 2000 | 16 / 19.5 | 2 | $2,194 |
MPG is a number. Dollars per year is the answer.
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How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What mpg does the Isuzu NPR-HD get?
16.2 mpg combined on average — 14.4 in the city and 19.1 on the highway, per EPA ratings across 2000–2009.
How much does a Isuzu NPR-HD cost in fuel per year?
About $2,370 at 12,000 miles and $3.20 a gallon — roughly $11,850 over five years, or 0.198 dollars a mile.
Which NPR-HD engine is the most economical?
The 2.2L 4-cyl at 19 mpg, against 15.5 for the 5.3L 8-cyl — a difference of about $456 a year.
Is the NPR-HD good on fuel compared with similar cars?
Against other V6 cars it sits below the average of 19.8 mpg, computed across 6170 ratings.
Are these real-world figures?
No — they are EPA laboratory ratings, the same ones on the window sticker. Real consumption depends on driving style, terrain, load and weather, and is typically a little worse.