Yong Heng help/advice

[Gerry52]

A few days ago I drained, flushed & refilled my YH compressor with Royal Purple. I just topped off a 30 minute SCBA & a small paintball tank (for my backpack). The oil is black again after only 15 minutes runtime. Should I drain, flush & refill again? Oil showed purple for about 45 minutes runtime on my initial fill when I first got the YH but turned pretty quickly this time around. Any thoughts/advice? 

 

[Odoyle]

Royal Purple turns dark really fast FYI...

 

[vinny]

This is what I’ve used in my yong Heng for 2 years never any issues knock on wood just keep it changed regularly, oh it’s only $9 quart at Napa auto 

 

[qball]

Same thing happened to me, it also got really thick too. I’m thinking about going back to Alphabet org after my bottle of royal purple is done.

 

[Gerry52]

Odoyle, I've heard that also, just thought it was strange that it didn't turn black as quickly 1st time around. Stayed purple for longer runtime on initial fill. 

 

[Odoyle]

Probably took longer to show signs of break in-wear in the first time around.

 

[ultramaxracing]

I been thinking about adding a needle bearing set up on my crank end. I think thats where the aluminum dust comes from, since its aluminum onto metal and what the amount of pressure on top of the secondary piston I would think large amounts of wear will happen. 

 

[Skydivingmiami]

agreed. royal purple gets dark quick and stays that way until you change it again. Its good stuff tho

 

[lennyk]

I been thinking about adding a needle bearing set up on my crank end. I think thats where the aluminum dust comes from, since its aluminum onto metal and what the amount of pressure on top of the secondary piston I would think large amounts of wear will happen. 

might be simpler to just replace the entire piston assembly every so often since you still have high pressure rings anyways as they wear.

the entire piston assembly with con rod and rings is less than $30

 

[PumaCarl]

The Royal Purple that I use is a dark purple from the start. I measure out 12 ounces in a clear pyrex measuring cup before putting it in. Looking in that little sight window and determining that it's dirty would take a lot better eyes than mine. Keep track of your hours instead. And yeah, I love to tinker with this stuff but I wouldn't spend too much time trying to re-engineer something as cheap to get parts for as the YH.