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Given the fact that you are replacing all valves and also cleaning the heads, this would be a perfect time to switch to synthetic. I might suggest you also clean out the 2nd stage separator element and take a peek in there as well. Blow out the intercoolers to insure they are clear and free. Lastly I suggest you change the oil twice. Run it for about 3 to 10 hours, then drain hot, then refill and drain on schedule.Another question...
Regarding synthetic versus petroleum based lubricant. I have read that switching from petroleum based to synthetic is "not" a good idea for a compressor that has been run for greater than a hundred hours or so on petroleum based lubricant.
I have no history on the unit and I have no idea what is in the crankcase now (see attached pic). Should I just assume it's petroleum based and stick with that? It will be getting all new valves and a new floating piston. In addition the heads will be cleaned accordingly.
Thoughts???
Excellent, execatly what I was hoping to hear, thanks again for the help / directionGiven the fact that you are replacing all valves and also cleaning the heads, this would be a perfect time to switch to synthetic. I might suggest you also clean out the 2nd stage separator element and take a peek in there as well. Blow out the intercoolers to insure they are clear and free. Lastly I suggest you change the oil twice. Run it for about 3 to 10 hours, then drain hot, then refill and drain on schedule.
You are in a great opportunity to do this.