Preservation of Engine
TTP B1-L3 ATA71 Cessna 172 B2-L1 Lycoming's preservation procedure : Drain the lubricating oil from the sump or system and replace with a preservative oil mixture. This preservation mixture consists of one part by volume MIL-C-6529C Type I concentrated preservative compound added to three parts by volume of MIL-L-6082C (SAE J1966), Grade 1100, mineral aircraft engine oil or oil conforming to MIL-C-6529C Type II. Follow carefully the manufacturer's instructions before use. An alternative method is the use of Cortec VC1-326 preservative concentrate added to the original oil at a ratio of 1 part VC1-326 to 10 parts of oil. Operate the engine until normal temperatures are obtained. Do not stop engine until oil temperature has reached 180°F. If weather conditions are below freezing, oil temperature should reach at least 165°F before shut down. Remove sufficient cowling to gain access to the top spark plugs and remove them. Through the