?????: ???? ???????? Aeroshell 41: A Comprehensive Oil????????? ???????? Aeroshell 41 ?? ????? ???? ?? ??? ?? ???? ???????? ?? ??????? ????? ??? ???????? ??????? ?????? ??? ???. ??? ???? ?? ???? ???? Shell Aviation ????? ??? ???? ???? ????? ?????? ????????? ??? ?? ???????? ????? ????? ??? ???. ??? ????? ?? ???? ??? ?? ???? ???????? Aeroshell 41 ???