Boat engines are plumbed and designed to have the oil removed by some kind of pump or extractor. The dip stick is mounted to the oil pan at the drain location with a Banjo bolt. This enables the removal of anything that settles to the bottom of the pan. In a car or truck, the dipstick tube does not go to the bottom of the pan, and most are attached going through the block, several inches above the bottom of the pan. By using the extractor method in a car or truck, you will not be able to remove all the oil or any debris that has settled to the bottom.