Adding engine oil to diesel

[jenevers]

Does anyone do this ( as recommended in original manual) or is it unnecessary with modern diesel?

[jake_crew]

If the intention is to add lubricity to the fuel to lubricate the fuel pump, then I'd say more necessary now than ever, with the modern low sulphur fuels we are forced to use.

Edited September 28, 2014 by jake_crew

[Guest]

Some use two stroke oil IIRC?

[peterboat]

Yes I add 2 stroke mineral oil it helps in cars so hopefully helps in boats

 

Peter

[Guest]

Yes I add 2 stroke mineral oil it helps in cars so hopefully helps in boats

 

Peter

i intend to try this next season. May I ask how much oil you add?

[steamraiser2]

A year or two ago the answer would be no as modern diesel fuels had far greater pump lubrication qualities than diesel fuels in times past. However the increase in bio fuels blended into today's diesel fuel may have changed all that. It is a pretty common practice to add two stroke in small quantities although I have never seen any evidence to support this. Those that worry about it do.. and have no trouble. Those that don't know about it don't ..and have no trouble !

 

Of course there are those that make black diesel and add a lot of oil !

[Split Pin]

Does anyone do this ( as recommended in original manual) or is it unnecessary with modern diesel?

 

The manual only says that adding up to 1% is permissible and recommends it as a way of using old engine oil (suitably filtered).

 

It recommends it use if paraffin is used as a fuel, (It also mentions the Custom & Excise requirements relating to to the use of non taxed fuels)

 

Its my understanding that Low Sulpher fuels have another additive for the lubrication of pump components

 

Steve