Oil blend SM-4.5 (OST 54-3-175-72-99, TU 0253-007-39247202-96) is a mixture of aviation oils MS-8P and MS-20 in a ratio of 75:25 (% by mass fraction).
Oil blend SM-4.5 (OST 54-3-175-72-99, TU 0253-007-39247202-96) is a mixture of aviation oils MS-8P and MS-20 in a ratio of 75:25 (% by mass fraction).