Cortec VCI326 is a broad range corrosion inhibitor oil additive recommended by Lycoming Service Letter# L180B for maintaining inactive engines. Provides protection for up to 24 mos at both contact and vapor levels. Simply add to present engine oil at ratio of 1 part VCI326 to 10 parts oil and then warm-up engine to operating temp. Meets MIL- 46002 & MIL-I-85062 (AS) Sold in 1 pt. bottles. ORM-D – Ground Only.