How many miles per gallon does a 1986 Chevy K5 Blazer get?
In general, a 1986 Chevy K5 Blazer delivers mid-teens fuel economy, typically around 12–16 miles per gallon in mixed driving, with highway figures often in the upper teens. Engine choice and drivetrain configuration are the biggest levers on this vintage SUV: four-wheel drive and larger V8s tend to pull the MPG down versus lighter V6 setups.
This article delves into what to expect from the 1986 K5 Blazer, detailing common engine and drivetrain configurations, and how those choices translate into miles-per-gallon ranges. Because these are classic vehicles, actual performance varies with condition, maintenance, and driving style.
Engine and drivetrain options in the 1986 K5 Blazer
The 1986 K5 Blazer was offered with several configurations that influence fuel economy. The most common engines were the 4.3L V6 and larger V8 options, paired with either 2WD or 4WD layouts and a range of transmissions. Heavier 4WD versions and V8 powertrains generally consume more fuel, while lighter, smaller-engine configurations can be a touch more efficient on highway driving.
Below is a quick reference of typical fuel-economy ranges by common configurations of the 1986 K5 Blazer.
- 4.3L V6, 2WD, automatic: approximately 14–17 mpg in city driving and 18–22 mpg on the highway.
- 4.3L V6, 4WD, automatic: approximately 12–15 mpg in city driving and 16–20 mpg on the highway.
- 5.0L/5.7L V8, 2WD: approximately 12–15 mpg in city driving and 18–20 mpg on the highway.
- 5.0L/5.7L V8, 4WD: approximately 11–14 mpg in city driving and 16–18 mpg on the highway.
These ranges are approximate and reflect typical driving patterns for the period. Real-world results can vary based on engine condition, transmission type, tire size, payload, and maintenance history.
Factors that affect MPG on a classic K5 Blazer
Fuel efficiency on a vintage SUV like the 1986 K5 Blazer is highly sensitive to several variables. The following factors commonly swing MPG up or down from the ranges above.
- Engine condition and compression: worn rings or leaky valves reduce efficiency.
- Drivetrain configuration: 4WD variants generally consume more fuel than 2WD counterparts.
- Transmission type and gearing: later overdrive transmissions or gearing can improve highway efficiency.
- Tire size and rolling resistance: larger, heavier tires reduce MPG; correct inflation helps.
- Maintenance and tune-ups: clean fuel system, proper ignition timing, and good fuel economy depend on regular service.
- Load and aerodynamics: payload, roof racks, and bumper alterations affect drag and weight.
Understanding these factors helps calibrate expectations for real-world mileage when maintaining or restoring a 1986 K5 Blazer.
Tips to maximize efficiency on a 1986 K5 Blazer
To optimize mpg on a classic Blazer, consider the following practical steps. They won’t turn a 1980s SUV into a modern economy vehicle, but they can help you approach the upper end of the historical ranges.
- Keep tires inflated to the vehicle’s recommended pressure and use appropriate tire sizes to minimize rolling resistance.
- Perform a thorough tune-up: check spark plugs, wires, ignition timing, and the fuel-delivery system.
- Use quality fuel and ensure the carburetor or fuel-injection system is properly calibrated for your engine.
- Reduce unnecessary weight and avoid unneeded roof accessories that increase drag.
- Drive smoothly: gradual acceleration and steady cruising improve efficiency more on older rigs than on modern vehicles.
By following these maintenance and driving practices, you can maximize the fuel economy that a 1986 K5 Blazer can deliver within its vintage design constraints.
Summary
The 1986 Chevy K5 Blazer offers a spectrum of mpg outcomes based on engine choice and drivetrain. Typical mixed-driving mileage lies roughly in the mid-teens, with 4WD configurations and V8 engines generally producing lower numbers than 2WD setups with a 4.3L V6. Highway mileage can reach the upper end of these ranges, particularly for lighter configurations, while real-world results depend on maintenance, tire choice, payload, and driving style. For enthusiasts, understanding these factors helps set realistic expectations and supports informed maintenance decisions.
How much is a 1986 Chevy worth?
Typically, you can expect to pay around $11,300 for a 1986 Chevrolet C10 1/2 Ton in good condition with average spec. What is the highest selling price of a 1986 Chevrolet C10 1/2 Ton? The highest selling price of a 1986 Chevrolet C10 1/2 Ton at auction over the last three years was $85,050.
What engine is in a 1986 Chevy Blazer?
Drivetrain
| Engine | Years | Notes |
|---|---|---|
| 350 cu in (5.7 L) V8 | 1973–1986 | |
| 1987–1991 | Throttle-body injection | |
| 400 cu in (6.6 L) V8 | 1975–1979 | 4WD models only |
| 379 cu in (6.2 L) Detroit Diesel V8 | 1982–1991 | 4WD models only |
Is the K5 Blazer good for daily driving?
It's smooth. It's not even like you're driving an old vehicle except for how damn cool it looks push button on the fly. Four-wheel. Drive independent front suspension all factory GM components.
What is the gas mileage on a K5 Blazer?
The MPG for a K5 Blazer depends heavily on its year and condition, with older models typically getting between 10 and 19 mpg, while a stock, well-maintained 1980s model might reach 15-19 mpg. Modern Chevy Blazers have much higher MPG ratings, with city ratings up to 22 mpg and highway ratings up to 29 mpg for some configurations.
Older K5 Blazers (1970s-1980s)
- Stock condition: A stock, fuel-injected 1980s K5 Blazer might get around 16-19 mpg, depending on the engine and driving conditions.
- Modifications: Older models with modifications, such as larger tires, can see lower MPG, with some users reporting 10-18 mpg.
- Realistic expectations: Expecting over 20 mpg on an older K5 is unlikely, especially with mixed driving or if the vehicle isn't in top condition.
Modern Chevy Blazers (2023-present)
- Gas models: A modern Chevy Blazer can achieve up to 22 mpg city and 29 mpg highway.
- Hybrid models: Hybrid versions (like the K5 sedan) have significantly higher MPG, with some reporting 30-40 mpg on the highway.
Factors affecting MPG
- Age and condition: Older models are less fuel-efficient.
- Modifications: Larger tires and engine modifications will lower MPG.
- Driving style: Aggressive driving lowers MPG, while conservative driving increases it.
- Maintenance: Regular maintenance, including clean oil and proper tire inflation, can improve MPG.
