Malibu LT4 Oil Service KitIf your engine is subject to extreme use such as excessive ballast weight, long idle time, low use, elevations above 5,000 ft., or commercial use, it is recommended to change oil and filter every 25 hours. See your specific owners manual for more details or see below for chart. Oil change instructions Before ordering your kit make sure to inspect your filter and see which one you have depending on when your boat was made. Below is image and the time