Gasoline vs Diesel Generators

Performance of Gasoline and Diesel Generators

Both gasoline and diesel generators can both provide electrical power for many applications. Performance is hard to compare with engines alone but the added factor of usage comes in handy. For backup generators performance is not as vital as the generator is not used on a daily basis. However for RV and portable generators, where generator usage can be continuous, performance can be measured here. Diesel generators will usually last longer than their gasoline counterparts and are more fuel efficient. Diesel generators normally run at lower RPM and produce more torque at lower speeds thus increasing engine life and lowering noise. A sample comparison is Guardian's QUIETPACT® RV generators. The 7500 wattage gasoline fueled generator has an engine RPM of 2571 while the diesel fueled generator of the same wattage rating has an engine RPM of 1950. The gas consumption per hour is also lower for the diesel model. Gasoline generators, if well maintained, can have quite a long engine life as well and their performance is at the same level as a diesel generator. Diesel generators, if not used frequently enough, can break down quicker as well. Performance wise, it really depends on application and how well the generator is used with manufacturer settings.

Safety of Gasoline and Diesel Generators

Both fuel types need to be stored carefully, however gasoline is more combustible and can be ignited by static electricity. A prime example is the signs to turn off the car engine and avoid using cell phones when pumping gas. Both generator fuel types produce dangerous fumes including CO which can lead to serious injury or death. The safety edge goes to diesel.

Cost Comparison of Gasoline and Diesel Generators

When comparing overall cost of gasoline and diesel generators, there are a lot of issues. First, diesel generators are usually made of more expensive parts that cost more to repair whenever they break down. The cost of a diesel generator can be 3 times as much as a gasoline generator. The next comparison is fuel cost. Diesel usually costs a little more than gasoline and both need some additives to maintain longer shelf life. Diesel generators, however consume less fuel than gasoline ones and there are slight savings in fuel. A diesel generator will probably have longer engine lifetime and less maintenance but when repairs are needed, the cost could be more expensive than repairing cheaper gasoline generator parts. In the long run, a diesel generator can save more money over a gasoline generator with higher RPM. This savings can be evened out with a lower RPM gasoline generator that is well taken care of. However, fuel consumption costs still goes to diesel generators