Biodiesel engines _ Biodiesel standard from engines

All engines are designed and manufactured for a fuel that has certain characteristics.
Typically, an engine company will define what fuel the engine was designed for and will recommend the use of that fuel to their customers in their owner's manuals.
Most major engine companies have stated formally that the use of blends up to B20 will not void their parts and workmanship warranties. This includes blends below 20% biodiesel, such as the 2% biodiesel blends that are becoming more common.
The steps taken by the biodiesel industry to work with the engine companies and to ensure that fuel meets the newly accepted standard provides confidence to users and engine manufacturers that their biodiesel experiences will be positive and trouble-free.