RL-2 DIESEL ADDITIVE 473ml. Our most concentrated diesel product, popular for semis, agricultural and fleet tanks. Cleans and lubricates injectors, pumps and rings, improving efficiency up to 5%. One 15oz bottle treats 100 gallons/One gallon treats 850 gallons fRL-2 DIESEL ADDITIVE 473ml. Our most concentrated diesel product, popular for semis, agricultural and fleet tanks. Cleans and lubricates injectors, pumps and rings, improving efficiency up to 5%. One 15oz bottle treats 100 gallons/One gallon treats 850 gallons for a strong clean up dose. For regular maintenance, use one bottle to 300 gallons of diesel fuel