Stvar je taka, da se zadeva NE priproča oz. ODSVETUJE, pri Mobilu so celo dali ven izjavo da naj ne uporabljamo aditivov. Če bi PTFE deloval tako dobro bi ga proizvajalci olj že zdavnaj dodajali oljem. Drugače ga pa vsebujeji vsi ti aditivi: Slick 50, Liquid Ring, Matrix, QM1 in T-Plus od K-Mart,...
Problem PTFE-ja je v tem, da zabaše razne majhne prehode, kjer olja mora vstopat.
Evo to je zaključek NASA-ine raziskave o tem:
Pa še ena raziskava, ki najde tudi pluse, a zelo pomemben minus:"In the types of bearing surface contact we have looked at, we have seen no benefit. In some cases we have seen detrimental effect. The solids in the oil tend to accumulate at inlets and act as a dam, which simply blocks the oil from entering. Instead of helping, it is actually depriving parts of lubricant"
In defense of Slick 50, tests done on a Chevy 6 cylinder engine by the University of Utah Engineering Experiment Station found that after treatment with the PTFE additive the test engine's friction was reduced by 13.1 percent, the output horsepower increased from 5.3 percent to 8.1 percent, and fuel economy improved as well. Unfortunately, the same tests concluded that "There was a pressure drop across the oil filter resulting from possible clogging of small passageways." Oil analysis showed that iron contamination doubled after the treatment, indicating that engine wear increased
Ne smemo namreč pozabiti da je PTFE v trdnem stanju, torej gre za suspenzijo v olju.