Engine Oil Additive

Is Prolong oil based or teflon based ?. The problem with any additive with solids such as Proma,Slick 50 etc is they can block oil Galleries and lead to oil starvation.Most additives have a downside, although I have had good results with Bitron 246 in gearboxs, diffs etc. But I would not put it in an engine long term because although it reduces friction in the long term it reacts with combustion gases and creates acids which is not good for the bottom end. Stick with a good quality oil, the secret to long engine life in a diesel is CLEAN AIR CLEAN FUEL AND CLEAN OIL and make it work, put the boot into but keep it in its designed rev range.
Cheers Pete

our Turbo Diesel 80 series has just on 530,000 klm on the original engine & we are about to head of on a 3 month trip. I always buy the cheapest in spec oil that says ' suits Turbo Diesel" on the label and new oil filter every 5000klm . (after 106 oil changes it must be time for a new sump plug?) And I add one bottle of Moreys Oil Stabiliser each time. and I add about 1/3 litre of two stroke oil per tankful of Diesel. The car still runs like new - works for me !

Modern day engine oils already comprise at least 25% additives. These additives are selected by a team of engineers who specialise in lubrication. They are added in the correct proportions taking into cosideration how they react with each other.

Why would the average driver want to upset that balance by adding somethng that we are not qualified to understand?

After 40 odd years in aviation, one thing I have learnt; only put in your engine what the manufacturer and/or oil company recommends.

Oil companies spent huge amounts of money getting their oils certified (API..) and people want to add "additives" that do not go through the same requirements. Good marketing I guess.