Thread: Adding 2 stoke oil to your diesel

I have been using 2stroke in my 200tdi for about 12 months
now, i think it runs quieter but can not prove it.
Fuel use is good at 9.7 to 10.4 km/ltr
depending what i'm towing and how hard i press
the right foot down.

Andrew

'93 200 tdi disco
'65 88' s2a

Originally Posted by RobHay

My tuppance worth.........Diesels burn oil............peanut oil, vegetable oil, mineral oil (diesel).......If they mucking around with the diesel and removing elements that affect the performance / maintainance of the engine then it makes sense to add something to restore these properties....Two Stroke oil sounds good to me........although I am not going to try it...................as all my vehicles are petrol

I tip all my left over outboard fuel (2 stroke premix) into my 110 V8's fuel tank as I prefer the outboard to have fresh fuel every trip........it might even give the benefit of leaving some residual lubrication on the SU carby needles when running on gas.

Originally Posted by mark2

I tip all my left over outboard fuel (2 stroke premix) into my 110 V8's fuel tank as I prefer the outboard to have fresh fuel every trip........it might even give the benefit of leaving some residual lubrication on the SU carby needles when running on gas.

wouldnt that foul the plugs? or are we only talking a couple litres

Originally Posted by Ace

wouldnt that foul the plugs? or are we only talking a couple litres

I'ts only 5-10 litres at a time at about 75:1 ratio. Never had a problem with plug fouling. The worst thing I ever found for plug fouling was a lead replacment additive I used to use in my 2A 2.25. Cant remember the name but it was sold in little bottles at most service stations.

Originally Posted by Brian Hjelm

Racor used to make plant that would separate and filter waste oil and meter it to your bulk fuel supply in a ratio determined by you.

Originally Posted by Ean Austral

OUR CUMMINS ENGINES ON THE BOAT USED TO HAVE AN OIL FILTRATION SYSTEM THAT MIXED THE USED SUMP OIL AND PUT IT THRU THE FUEL SYSTEM TO BE RE-BURNT.THE RATIO WAS 60LTR SUMP OIL TO 6000LTS DEISEL...AFTER HAVING THE SYSTEM FOR 6 MTHS AND SEEING THE CLOUR OF THE FUEL FILTERS AFTER 100HRS RUNNING, AND THE FUEL THAT DRAINED OUT OF THEM THE SYSTEM WENT IN THE SHED NEVER TO BE USED AGAIN..
I WOULDN'T ADD OIL OF ANY SORT TO MY FUEL SYSTEM,EVEN IN THE SMALLEST AMOUNTS..

CHEERS EAN

Ean, I know major truck fleets that have been doing this for decades without ill effects. The separation and filtration systems used are usually to a higher standard than the OEM system supplied with engines. all major diesel engine manufacturers approved this. I think the emissions regulations have put this idea out of favour in recent years.

I change the oil, Valvoline 20/50, in my Falcon ute every 5000 k's and it is a slight brown colour by then. I pour it into My County-Isuzu as fuel.

By the way, if you are using the toilet roll filters, you may as well strain your fuel or engine oil through an Afghan's loin cloth for all the filtration they do. The nice shiny ones look very decorative hung on the outside of a truck but they don't filter. The engine oil rolls get nice and dirty like anything soaked in dirty sump oil will but the rolls simply channel at first use and the fluid just runs through. You can replace the toilet rolls with a filter element but why? You already have (or should have) adequate filtration to the standard required by the engine maker. As an example, at White Motor all OZ built trucks were fitted with a Luberfiner by-pass filter as standard equipment. Detroit Diesel and Caterpillar were OK with this but did say that the equipment was un-necessary as it did not add any better filtration to the manufacturers system. Cummins, who owned Fleetguard at the time wanted it. Nice little earner for them.

Originally Posted by mark2

I tip all my left over outboard fuel (2 stroke premix) into my 110 V8's fuel tank as I prefer the outboard to have fresh fuel every trip........it might even give the benefit of leaving some residual lubrication on the SU carby needles when running on gas.

Did you notice any difference in the running in general?

Originally Posted by Crackerjack

Did you notice any difference in the running in general?

The outboard certainly runs better with fresh fuel every time - it's very sensitive to fuel freshness in terms of starting and idling.

I notice no difference with the V8 with some 2 stroke oil in the petrol, the main reason for doing it is simply to use the surplus 2 stroke fuel, however while it might give the benefit of better cylnder wall lubrication on cold startup and residual lube for carb needles when running on lpg, its not my intention to be an advocate for 'adding 2 stroke oil to 4 stroke petrol engines'! I have also run surplus 2 stroke fuel in a honda 4 stroke generator for hours on end with no issues, but again, only to avoid throwing fuel away.

For what its worth, I also add some 2 stroke oil to the fuel tanks of my various diesel engines (Nissan TD42, Kubota ride on mower and 50 year old B414 tractor) from time to time - sometimes it seems to make a difference, but I am also aware of placebo effects and the limitations of human perception, in any case I'm confident that it does no harm.......

Originally Posted by mark2

The outboard certainly runs better with fresh fuel every time - it's very sensitive to fuel freshness in terms of starting and idling.

[snip]

Ditto with my chainsaws.

Back in another lifetime when I raced karts, we always dumped the surplus fuel into the tow vehicle, in my case a V8 Commodore.
The smell of R30 wafting across a set of lights made people look
Any excess/out of date saw fuel ends up in the tank of the old Falcon that lives here ATM, i'm sure a small amount of Motul 800 2T won't hurt.