Annual Oil Change Interval
I listened to an EAA webinar last night with Phil Lockwood discussing the 912 engine as the speaker. It was very informative but he said something which I submitted a question to verify what he said… he said the oil should be changed at 100 hours OR one year, whichever comes first. Does anyone know from where the one-year interval comes? I’ve looked through the Line Maintenance Manual and the 100 Hobbs hour interval is all I can find. Are others using the calendar year too? If so, can anyone explain the logic of calendar vs. engine time?