These multi pack premix kits are designed to save on shipping utilizing the various packages and weights to benefit the consumer. Buying single quarts in multiples may not be the best method and can cost more in the long run. A special blend of base oils reduces deposits and subsequent exhaust port clogging. As a result, your rotary will maintain the power at which it was designed to produce. Special detergent/dispersant additives keep your fuel injectors clean to reduce maintenance. Provides additional lubrication for apex and side seals to increase seal life and increase engine efficiency. Special additives allow for better sealing of the chamber, creating greater efficiency and more power. Inherently with many rotary engines, the entirety of the rotor and housing are not being sufficiently lubricated, resulting in premature wear or damage. In order to increase lubrication within the rotary, Idemitsu developed Idemitsu Rotary Premix. At 1/2 oz per gallon of fuel, it is a cost effective way lubricate more of your engine and prevent premature catastrophic damage.