quote:Would be great to learn from somebody what the theorie and practice say about impact of weight on valve train wear. As for the properties of a new range, all grades are formulated with a lower flash point than it was in the past (I can only guess why), but what is HT/HS ! It became really higher. Interesting that 5W-40 (most likely biogradable like its predecessor) has higher HT/HS than 10W-40.
Originally posted by Primus: Which grade would give lower valve train wear ?
quote:In my limited experience, it is a combination of valve train weight, valve spring pressures, materials used, surface finish and hardness. So many variables in that little group, it's almost a science in itself. Rick.
Would be great to learn from somebody what the theorie and practice say about impact of weight on valve train wear.
quote:These graphs give just a general idea/trend, but data itself is similar to an average patients' temperature in the hospital. No doubts that 0W-20 and 20W-60 will give different wear. And thanks for your link. It's wonderful that somebody may closely follow manufacturers' updates and let others know.
Originally posted by theguru: According to the graphs in my link above the new 300v is tested as having less than half the valvetrain wear of the old 300v.