I found this on HPC ceramics site:
quote:It sounds like a good idea but what is the general census on doing this? You can see it here: http://www.hpcoatings.com/engine_coatings.htm
Our S01 is applied to the skirts of the piston to reduce friction and prevent scuffing. This wettable matrix coating is a Molybdenum Disulfide based coating rather than PTFE. Moly is a higher pressure lubricant and does not "cold flow" under pressures exceeding 150,000 psi. Also Moly attracts oil keeping an adequate film of oil on the part. PTFE will shed oil and thus becomes the only lubricant between the piston and the cylinder wall. The Moly is suspended in a thermosetting polymer binder which hardens during curing providing a permanent lubricant unlike break-in Moly sprays. S01 can also be applied to the stem of the valve to reduce friction and wear. Engine bearings are another excellent application for HPC's S01 coating.