Hunt & Live

Q&A · Off-Grid

Can a diesel generator run on biodiesel or WVO?

April 5, 2026

Quick Answer

A diesel generator can run on biodiesel, but the compatibility depends on the generator's fuel system and the biodiesel's quality. Biodiesel blends can be used in diesel generators, but the percentage of biodiesel can affect the engine's performance. WVO (Waste Vegetable Oil) can be used as a fuel, but it requires extensive processing and filtering before use.

Biodiesel Compatibility

Biodiesel is a suitable alternative fuel for diesel generators, but it’s crucial to ensure the generator’s fuel system can handle the unique properties of biodiesel. Biodiesel blends typically range from B5 (5% biodiesel, 95% diesel) to B100 (100% biodiesel), with B20 being a common blend. Higher biodiesel blends can cause issues with fuel system components, fuel injectors, and engine performance. A good rule of thumb is to start with a lower blend and gradually increase the percentage as the generator’s performance stabilizes.

WVO Processing and Use

WVO, also known as used cooking oil, can be used as a fuel in diesel generators, but it requires extensive processing and filtering to meet the generator’s fuel quality standards. The first step is to separate the oil from any food debris and water using a series of filters and centrifuges. The oil is then heated and filtered again to remove any remaining impurities. It’s essential to use a WVO processor or a well-designed filtration system to ensure the fuel meets the generator’s specifications. A typical WVO processor can process up to 1 gallon per minute, and the fuel quality should meet the ASTM D6751 standard.

diesel-vehicles-off-grid diesel generator biodiesel
Share

Find more answers

Browse the full Q&A library by topic, or jump back to the topic this question belongs to.