Diesel Fuel Additives

You could try something that gets rid of diesel "bug" (growth of algae). If you do be sure to check your fuel filter for a while. Don't want the bug clogging up the system on your next trip :)

I have a td42t GU that has a rotary fuel pump and relies on diesel for its lubrication. This new low sulfur diesel must comply with a lubricity standard however I am still worried about pump wear as I don't know that it lubricates as well as the old diesel. Perhaps this is unfounded but there are now a number of additives that claim to improve diesel lubricity. I am using Moreys diesel stop smoke for the reason that their upper cylinder lubricant for gas/petrol motors is a good product. They make some other claims for this product as well however I am using it in the hope it will increase the service life of pump and injectors. Maybe Captain will read this and give us the low down on low sulfur diesel lubricity.

There are lots to choose from, most will give some results or at least pay for them selves. Having good results from synforce diesel treat. More power and better economy. Trip to Gulf ( 5000k ) in a cruser ute which is usually fairly consistant on consumption, used about 180lt less with treatment.

I use PRO-MA, claims to break down water in the fuel to aid combustion,cut down waxing, lubricate the fuel pump, etc,etc. The fact is that it has cut down the fuel consumption and smoke so something is working, I think.

I got some Falsh Lube diesel conditioner from 'the experts' in the southern highlands last time I had my vehicle serviced and i've been pretty happy with it. It is supposed to improve the low sulpher fuel as well as give fuel economy improvements on top of just cleaning and lubricating. I haven't done any tests or keeping of figures but I will try to over the next few months to see just how much better the economy is. They claim up to 6.5% as well as improved power.

Bumped into a guy the other day who says he has always added a "cup" of gearbox oil whenever he fills up (for added lubrication). Swears by it. Anyone ever heard of this one?

Yes. The 4.2 patrol or cruiser won't have any drama's, but the 3.0 Hilux/Prado and 3.0 Navara/Patrol donk's have computer aided fuel pumps. There is a small amount of electrical wiring inside the fuel pumps, and although I'm sure it would be insulated from the diesel, some of these fuel additives contain corrosives for cleaning purposes, and this is a grey area for me.

I have spoken to the guys at United fuel injection here in perth, and they have advised me not to use fuel additives. Besides, these new high falutin' fandango hitech turbo's are made to run on low sulpher diesel

I wrote to 4WD Monthly about this, but up to now have not had a reply.

My mate spairingly uses a fuel additive in his 4.2 80s cruiser, and has found that his fuel filter cloggs up more quickly with the gunk being cleaned out of the fuel system. At first we thought it may have been a dirty batch of fuel, but on reflection it is more likely to be gunk from the tank and fuel lines.

As for the auto trans fluid. TUT TUT. This would shorten the life of the motor oil, let alone be very poisonous and poluting.