About B99 Biodiesel Blends

B99 Biodiesel is a high-level biofuel blend consisting of up to 99.9 percent biodiesel and 0.1 percent petroleum diesel. B99 and other high-level blends (B100) are less common than B20 and other low-level blends. B99 can be used in some engines built since 1994 with biodiesel-compatible material for certain parts, such as hoses and gaskets. It has a solvent effect, and it can clean a vehicle’s fuel system and release deposits accumulated from petroleum diesel use. The release of these deposits may initially clog filters and require frequent filter replacement in the first few tanks of high-level blends.

When using high-level blends such as B99, a number of potential issues should be considered. High-level biodiesel blends can impact engine warranties, gel in cold temperatures, and may present unique storage issues.


B99 Fuel Availability and Use

Given the relatively high cost and performance impact of using high-level bio-diesel blends, B99 is not commonly sold by fuel retailers, but rather to fuel retailers – along with national fleets and petroleum companies – for the purpose of creating lower-level blends. (B5, B6-B20) Organizations seeking high-level biofuel blends tend to work with dedicated biofuel suppliers on long-term purchase and distribution agreements.

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