THE INFO THAT YOU REQUIRE: THE 0-235 LIFE IS 2400HRS AND THE 0-320/360 IS 2000HRS IF YOU LOOK UP AD/ENG/4 AM7 IT WILL TELL YOU THAT YOU CAN EXTEND TNE LIFE OF THE ENGINES DEPENDING ON THE OPERATIONAL REQUIREMENTS OF THE AIRCRAFT. READ THE AD AND TALK TO YOUR MAINTENANCE FACILITY. IM A L.A.M.E. MY SELF AND IM ALSO THE CHEIF ENGINEER OF A MAINTENANCE FACILITY IF YOU NEED ANYMORE HELP JUST POST A NOTE HERE AND ILL TRY TO HELP.......SEE YA.......