Alloy c/t replied:

De sludge works , am now at 360,000 klm, used the desludge at 300,000 klm . an oil and oil filter change on our tojo 80 series turbo diesel is 9.8 lt , when did the de-sludge got out just over 11lt of the blackest crapola ever seen , now oil stays "golden" inbetween changes ,, cant say that it has improved economy in a measurable way but less smoke all up ,smooth idle and cleaner oil change is/was worth the $ to me.

Ray Bates replied:

What about petrol/LPGs?

Max - Sydney replied:

Eric

Put their oil treatment through my 80 series non turbo diesel at about 180,000 km, and while I never got all the rubbish out that others report, I got a lot. I have done maintenance doses according to their recommendations every second oil change since, and it remains really clean by comparison. When you rub a bit off the dipstick between your fingers it no longer feels gritty. Less vibration at idle when I'm getting close to oil change time.

I'm about to order another bottle. Have done nothing about fuel as just using major brand fuels seems to have kept the injectors clean - fuel economy is till about the same as when l had injectors done about 150,000 ago.

Max