The Chevrolet S-10 Blazer does 19.4 mpg combined (16.9 city, 23.3 highway), which works out to about $1,979 a year in fuel at $3.20 a gallon and 12,000 miles. Engine choice matters more than you'd think: 2L 4-cyl does 23 mpg while 4.3L 6-cyl does 17.8 — a difference of $487 a year. Against other V6 cars it sits below the average of 19.9 mpg.
Every Chevrolet S-10 Blazer engine, compared
Gas mileage on the Chevrolet S-10 Blazer ranges from 23 down to 17.8 depending on which engine sits under the bonnet — a spread of $487 a year across 4 versions of the same car. Picking the right one 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 |
|---|---|---|---|---|
| 2L 4-cyl | 20 / 27 | 1984–1984 | $1,670 | |
| 2.5L 4-cyl | 19.3 / 25.5 | 1985–1988 | $1,761 | |
| 2.8L 6-cyl | 16.2 / 22.5 | 1984–1989 | $2,076 | |
| 4.3L 6-cyl | 15.4 / 21.6 | 1990–1994 | $2,157 |
What that actually costs
The Chevrolet S-10 Blazer burns a gallon every 19.4 miles, so 12,000 miles takes about 619 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.165 |
| Fuel per year | $1,979 |
| Fuel over five years | $9,895 |
| Against other V6 cars | +$49 a year |
| EPA's own estimate | $3,353 a year |
City or highway — who is this car for
The Chevrolet S-10 Blazer gives up 6.4 mpg the moment you leave the motorway — 23.3 out there against 16.9 in town, a 38% drop worth $624 a year. 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 | 16.9 mpg | $2,272 a year if you only drive in town |
| Highway | 23.3 mpg | $1,648 a year if you mostly commute |
| Gap | +6.4 mpg (38%) | Wide — this car dislikes traffic |
How the S-10 Blazer changed over the years
The S-10 Blazer peaked in 1984 at 21 mpg (18.5 city, 25.5 highway) and was at its thirstiest in 1992 at 17 — 4 mpg apart, or $430 a year in fuel between buying one year and the other. The 1994 car does 18. 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 |
|---|---|---|---|---|
| 1994 | 15 / 22 | 1 | $2,133 | |
| 1993 | 15 / 22 | 1 | $2,133 | |
| 1992 | 15 / 20 | 1 | $2,259 | |
| 1991 | 16 / 22 | 1 | $2,133 | |
| 1990 | 16 / 22 | 1 | $2,133 | |
| 1989 | 17 / 24 | 1 | $2,021 | |
| 1988 | 17.5 / 24.5 | 2 | $1,873 | |
| 1987 | 17 / 23 | 2 | $1,969 | |
| 1986 | 17.5 / 22.5 | 2 | $1,969 | |
| 1985 | 18 / 24.5 | 2 | $1,873 | |
| 1984 | 18.5 / 25.5 | 2 | $1,829 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 16 EPA ratings of the Chevrolet S-10 Blazer — 4 engines across 1984–1994. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,353. Full method.
Frequently asked questions
What mpg does the Chevrolet S-10 Blazer get?
19.4 mpg combined on average — 16.9 in the city and 23.3 on the highway, per EPA ratings across 1984–1994.
How much does a Chevrolet S-10 Blazer cost in fuel per year?
About $1,979 at 12,000 miles and $3.20 a gallon — roughly $9,895 over five years, or 0.165 dollars a mile.
Which S-10 Blazer engine is the most economical?
The 2L 4-cyl at 23 mpg, against 17.8 for the 4.3L 6-cyl — a difference of about $487 a year.
Is the S-10 Blazer good on fuel compared with similar cars?
Against other V6 cars it sits below the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world S-10 Blazer figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Chevrolet S-10 Blazer is $3,353 against the $1,979 we compute at 12,000 miles. Expect a little worse in practice: the spread between the 23 and 17 mpg versions of this car is smaller than the spread between two drivers of the same one.
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