pescador775
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Scubadoo, Nuvair 455 (synthetic mineral) or Chemlube 751 (synthetic ester). Both of these oils are traceable. (we know they were not mixed in somebody's garage). A five hp motor will need at least a 25 amp breaker. I prefer 30 amps. A 7.5 hp should have a 40 amp breaker if used on that compressor but you might get by with less. Don't worry about starting current, just use a reasonable size electrical feed, the circuit breaker will tolerate hard starts within reason.