[dicklague]

The low friction part was not the coatings on the pistons. It had to do with low resistance rings and piston design. Controlling the blowby was a big problem so much so that the best PCV system is revision #6!

They wanted optimum fuel economy and these low friction pistons and rings were supposed to be the answer.

Also the stock piston is cast and not forged. They are adequate, but are a week point in a very stout motor.

JE and Wossner make very nice forged pistons for this engine that are much better and have more conventional rings that really work.

With the OEM pistons your oil is black with carbon 500 miles after an oil change!