We all seem to have a chainsaw story, I don't have any with a good ending. Even mostly running the $20 a gallon canned stuff.

But the additives for diesel have my interest. Not having the cold to need the anti gel additives, I have not looked at them. I know 30 years (?) ago when California had sulfur more or less removed adding STP or 2 stroke oil was the thing to do. But very shortly I found my fuel supplier was getting diesel from a small refinery that was paying a "fee" to not have to come into compliance. So I did not worry about adding anything. Life goes on and I forgot about it, changed suppliers and the old Cats have run fine. But as I slow down the Cats sit more and I wonder when the day will be I have stuck plungers in a fuel pump. Now my SIL tells of a tired old 7u D4 his dad has that needs the plungers nudged just a bit to take off and run. Anybody have a majic juice that may help.


I was offered a 9u D6, in 2015 that had been parked because of the land retirement the USDA started in 1985. It did one day of discing fire breaks until a steering clutch rusted. Sat in a barn until it started blowing away. The fuel in the tank was the old blue color and smelled just like it always did in the "good old days". That old fuel burned just fine had trouble with the rust off the top 1/4 of the tank but not the fuel. I would wager that todays diesel fuel is much more like the gas that goes bad in very short time.

side-seat wrote:

I use Aviation fuel 100 Low Lead in all of my gas powered engines like lawn mowers pony motors and the gas CATS. Most sit for months at a time and I have no issues. It also smells better than regular pump gas. I haven't checked cost this year but last summer I was paying around $4.80 gal.
 

the best thing if you can get it. as its restricted in most places for aviation use only. it can pay to have friends that are pilots of piston engine aircraft. just dont get caught by the EPA inspectors using it as its banned for land use. what i have used for years is a lead replacement called flash-lube mixed at 1ml to the litre of fuel 1LT of product does 1000lt of fuel i also try to buy premium unleaded and never buy the ethanol added fuel.

for diesel we use flash lube diesel conditioner as it has lubricity additives to keep the seals supple and the pump in good condition and a slight cleaning effect it is also a upper cyl lube too same ratio for mixing

I bought this stuff a couple of years ago and add it to the tank of old Cats that sit around, but can't report if there is any improvement with the fuel systems, they were fine before and are still fine, I'm trying some now in my 2000 build Toyota Landcruiser pick up just to see if it makes any difference.