I use Nuvair 751 oil in my YH. It will be 3 years old in April. Most months it only fills my 45 minute SCBA tank once. But occasionally I get busy and fill it a couple times. I refill the bottle at around 3000 psi. Sometimes a little less but usually a little over 3000. I stop at 300 bar. If I fill from 3200 to 300 bar it takes less than 20 minutes but if I let it go to 2800 psi then it may take 30 minutes. I have a computer radiator with fans on it to keep the water cooler and use a couple soft drink bottles frozen solid too in the summer. Plus I have a small fan helping the built in fan on the motor. My YH stabilizes at less than 60 degrees C. It gets up to 50 C pretty quick but then climbs much slower after that. I change the oil annually. That is less than 10 hours run time for me.
I had to replace the O-ring next to the reed valve once but otherwise it just works. I also have replaced the temperature gauge and the pressure gauge doesn't work but I ignore it anyway. I just watch the more accurate gauge on the bottle. When I had it apart replacing the O-ring the second stage piston had some carbon on it that I wiped off. The rings on the piston looked fine.
I let the oil from the first few oil changes (I did one after a hour or two running) in a clear container for over a year. There was noticable sludge in the bottom of the container when I emptied it. I change the oil in my vehicles with full synthetic oil every 5,000 miles. I hold the used oil in a 5 gallon container until it gets full then I recycle it. That 5 gallon container gets sludge in it too. I think it's a good thing to get that sludge out of the compressor or motor.
I had to replace the O-ring next to the reed valve once but otherwise it just works. I also have replaced the temperature gauge and the pressure gauge doesn't work but I ignore it anyway. I just watch the more accurate gauge on the bottle. When I had it apart replacing the O-ring the second stage piston had some carbon on it that I wiped off. The rings on the piston looked fine.
I let the oil from the first few oil changes (I did one after a hour or two running) in a clear container for over a year. There was noticable sludge in the bottom of the container when I emptied it. I change the oil in my vehicles with full synthetic oil every 5,000 miles. I hold the used oil in a 5 gallon container until it gets full then I recycle it. That 5 gallon container gets sludge in it too. I think it's a good thing to get that sludge out of the compressor or motor.
