RXSOL-70-7002-020 Dual Purpose plus is a concentrated combustion improver for heavy fuel oils. It also has fuel conditioning properties.
It is completely oil-soluble and should be added via a metering pump into the suction side of the booster pump. Alternatively, it can be added into the settling tank. If so the dose rate should be increased by 10 % .As a general guide, the average dosage should be 1:4000. Alterations can then be made according to operating experience and results obtained.
Note: This article uses material from the http://rxmarine.com/