I decided to try the Austalian version of slick 50 back in the year 2001, we have a product called "Nulon engine treatment" along with another 5 or so Nulon additives for various applications. PTFE is the active ingredient in their range of engine products.
So, my ford 6 had started to sip a bit of engine oil, I put up with it for a while, but it gradually got worse and was chewing through nearly 1 litre every 1000 kays (3 fills of lpg,) (1 weeks driving). I decided to try out the Nulon worn engine treatment as I didn't have much to lose if it didn't work! I had a steering column mounted vacuum gauge hooked up to the engine for tuning purposes, and knew the car well. I have to say that the product did what the company claimed it would, the vacuum gauge showed an improvement at hyway cruise speeds, only the width of the gauges needle, but a definite change. The temp gauge dropped about the same amount, and the oil use went down to about a litre every 4-5000 kays, (that saved me some cash!), plus the engine ran quieter, I still have that ford in my backyard, it was decommissioned a couple of years ago after being passed around to some family members. The speedo broke at 4hundred and something k/m's a few years ago, I don't know the total mileage (kilometerage?) travelled, and can throw a battery into it tomorrow and it still runs just fine. I usually throw a bottle of their product into my engine at service intervals.
