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About Rosmac

stop diesel engine black blue white smoke, reduce your maintenance costs, cars 4x4 4wd trucks excavators lawnmowers chainsaws power boats yachts, engine rebuild recondition maintenance, vehicle machinery, fuel diesel petrol consumption, oil consumption ch

Products & services

DeSLUDGE Engine flushing oil concentrate to release sludges from internal engine components


Engine oil sludge is a major cause of chronic overheating problems, but can be easily rectified by using our Flushing Oil Concentrate, DeSLUDGE FOC, which has superior chemicals for cleaning and remo…



It is widely recognised that approximately 80% of engine wear occursduring start-up when a good deal of the lube oil has drained back into the sump, leavinga minimum oil film thickness for effective …

News & updates

DIESEL Fuel bugs


Warmth is usually from the local ambient conditions, but diesel tanks in engine rooms and non-cooled high flow return lines into small fuel tanks will increase the diesel tank temperature. Other ste…

Articles - Rosmac Ltd


ARTICLES on all sorts go in here, many of which have links to useful products. How to simply check engine oil condition and extend oil life. Problems that may easily be solved with a simple-fix. F…

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