Its been a week now since I changed oil on my DeVilbiss 6.5HP 240V air compressor. Ive had this compressor since new for 20 years, no issues. This compressor calls for SAE20 ND on the label on the compressor (No ISO recommendations). I try to guesstimate 100 hours of use, then change the oil. Last week I was in a rush and picked up some Amsoil air compressor oil at the local NAPA, not realizing the weight was ISO 100 (SAE 30/40) instead of ISO 46 (SAE 20). After draining the old oil and filling the compressor with the ISO 100, it seems to run quieter and fill the tank faster. This compressor is in a heated garage and will never operate under 60 degrees F, even if its minus 20 F outside. Are there any long term issues of running this (ISO 100, SAE 30/40) oil in my compressor that calls for SAE 20? If the consensus is to change to the recommended SAE 20, its no big deal. Oil is cheap and it takes 5 minutes to change. This compressor is used a fair amount for sand blasting and other continuous use tasks.
Thanks in advance
Thanks in advance