Ford Straight Six Performance
- When introduced in 1965, the larger 300-cubic-inch straight six was joined by a 240-cubic-inch straight six, rated at 170 and 150 horsepower, respectively. In 1978, only the larger straight six was offered, producing just 114 horsepower. By 1987, fuel injection was added, raising the horsepower rating to 150.
- The final year the straight six was used was 1996, and it was replaced by a 4.2-liter, V6 engine beginning in 1997. The 1996 Ford F-150 inline six-cylinder (I6) engine is rated at 145 horsepower at 3,400 rpm and 265 pound-feet of torque at 2,000 rpm, utilizing a multi-point fuel injection system, according to Motor Trend.
- Fuel economy for the 1996 two-wheel-drive Ford F-150 is 12 miles per gallon in the city and 17 mpg on the highway when equipped with the straight six paired with a three-speed automatic transmission. With a five-speed manual transmission, this engine is rated at 14 mpg city and 18 mpg highway.