The Caster Oil is passed out through the exhaust and only the small amount that gets cooked onto the exterior of the engine causes some problems and they are only cosmetic. This is commonly refered to as 'Varnish' and does not affect the operation of the engine. If you leave any fuel inside the engine for a LONG period of time (six months or more) the fuel will thicken into a 'GOO' that can cause problems. However - it flushes out easily. [8D]

After run oil is an Oil Blend to put in the engine after a day of flying, 2-3 drops and you turn the engine over to coat the inner working and the engine will live for years. There is a brand that you can buy, or you can make your own. The common formula is 50/50 Automatic Transmission Fluid and WD40. Again this is a matter of opinion, some recommend that you use a light machine oil, and others say ATF works fine by itself. Personal preferance, trial and error...

The B Bulls are having a rough year - they are below a 500 season [&o], perhaps they'll come back in the finals.