Oil

Oil is the lubricating fluid that your engine needs in order to function correctly. On an aircooled engine it performs 3 functions:


 * Lubrication - reduces wear on metal parts
 * Cooling - helps to carry heat away from the heads
 * Cleaning - keeps harmfull deposites in suspension until they can be filtered out (on those engines with oil filters)

For more oil topics see:
 * Changing the oil
 * Discussion of oil