Mobil AV-1 Engine Inspection and Repair Protocol
I. Threshold Level of AV-1 Use/Engine History Protocol Teledyne-Continental IO-520, TSIO-520, GTSIO-520, IO-550, TSIO-550, GTSIO-550, O-470, IO-470, TSIO-470, O-360, IO-360 and TSIO-360 piston aircraft engines in which Mobil’s AV-1 oil was used for inore than 150 hours, and were not completelv rebuilt or completely overhauled since discontinuance of AV-1 use, qualify to be inspected pursuant […]