Engine Oil Check
Oil is considered the life-blood of your engine, this is why the quality and amount of motor oil inside an engine is critical to keep it properly running. Clean oil should have a honey like color and transparency, but if it turns dark brown or black in color, then it is time to have it changed.
Changing engine oil and oil filters at recommended service intervals greatly engine wear and reduces the chance of premature engine damage. Try doing it every 7,000 or 8,000 miles or three months as a rule of thumb and be sure to use your car manufacturer's recommended grade of motor oil and oil filter.
Also, don't forget to regularly check your car's oil level and see to it that it also doesn't go way past the maximum level as too much oil an also lead to premature engine damage.
The Purpose of Oil!
We all know we need it, but a lot of people don't know why! Engine oil lubricates, cleans, and cools critical parts of the engine. The oil's additives also help to suspend dirt, where it can be drained at the next oil change.
Hope this will help...