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There hasn't really been a brand of semi trucks recognized as the most fuel efficient. Since they run on diesel a more efficient fuel, semi trucks already are more fuel efficient than cars in terms of size and power.
Yes a diesel pickup truck will be more fuel efficient than those that run on normal fuel. Diesel is designed to run longer than the regular fuel however it comes at a higher cost.
A hybrid truck won't use up fuel at quite the same rate that a normal truck does. Hybrid trucks are considered to be more fuel-efficient and environment-friendly.
It will use more fuel if you remove the catalytic converter.
there is no accesory for that
No. Recent advance in technology do not require idling of a semi.
A car has to be fuel efficient. It means it has to completely burn the fuel.
Lighter weight, more aerodynamic, and more fuel efficient engines, transmissions, and tires.
Yes, the indirect injection is more fuel efficient because it provides stability to the engine.
everyone wants a more fuel efficient vehicle is the main reason
It is more fuel efficient and it costs less to make.
Streamlined shapes make them faster and more fuel-efficient.