* Check the oil level. The oil level should be between the "full" and "add" marks on the dipstick. If the oil level is low, you will need to add oil.
* Look for leaks. If you see any oil leaks, you will need to have them repaired. Oil leaks can cause the oil level to drop, which can lead to engine damage.
* Listen for knocking or ticking noises. Knocking or ticking noises can be a sign that the oil is low or dirty. If you hear any of these noises, you should check the oil level and have the oil changed if necessary.
* Check the oil condition. The oil should be clear and free of debris. If the oil is dark or cloudy, it is time to have it changed.
If you are not sure whether or not your Kawasaki EL 250 1990 needs oil, you can always take it to a qualified mechanic for an inspection.
