▁free . ▁▁ ▁D iss ol ved ▁- ▁D iss ol ved ▁water ▁in ▁oil ▁is ▁the ▁presence ▁of ▁water ▁but , ▁un not ice able ▁to ▁the ▁eye . ▁The ▁water ▁continues ▁to ▁develop ▁until ▁s atur ation ▁point ▁where ▁water ▁visibility ▁begins . ▁▁ ▁Em uls ified ▁- ▁At ▁the ▁point ▁of ▁s atur ation , ▁a ▁cloud y ▁appearance ▁will ▁be ▁the ▁tell - t ale ▁sign ▁that ▁the ▁water / o il ▁mixture ▁has ▁become ▁em uls ified . ▁▁ ▁Free ▁- ▁The ▁most ▁developed ▁stage ▁of ▁fuel ▁cont am ination ▁is ▁when ▁free - flow ing ▁p ud d les ▁of ▁water ▁appear ▁within ▁stored ▁oil . ▁At ▁this ▁point , ▁b acter ial ▁cont am ination ▁and ▁growth ▁is ▁boost ed . ▁ ▁Micro b ial ▁cont am ination ▁ ▁The ▁cont amin ants ▁found ▁in ▁fuel ▁can ▁be ▁made ▁up ▁of ▁a ▁number ▁of ▁things , ▁pre domin antly ▁H orm o con is ▁Res inae , ▁which ▁is ▁typically ▁the ▁main ▁cont amin ant ▁when ▁micro b ial ▁cont am ination ▁is ▁present , ▁along ▁with ▁b acter ia ▁Pseud omon as ▁Aer ugin osa , ▁and ▁fung i ▁such ▁as ▁ye asts ▁and ▁m ould s ▁like ▁Y arrow ia ▁tropical is . ▁ ▁F uel ▁pol ishing ▁process ▁ ▁In ▁ess ence ▁" pol ishing " ▁is ▁an ▁advanced ▁level ▁fil tr ation ▁of ▁the ▁fuel , ▁monitor ed ▁and ▁controlled ▁via ▁a ▁central ▁processing ▁unit . ▁Its ▁application ▁ens ures ▁the ▁need