No petroleum based oils can be used. most After Run oils are petroleum based. If you don't know that its 100% synthetic don't use it.

Some alternatives to the Afterun oils on the market.

Dave Shadel sells the Ultra Oil its perfect for YS engines. www.pspec.com

and specifically http://www.pspec.com/details.asp?ProdID=40&category=7


Also you can use Mobile 1 Synthetic oil. 0W-20 is the lightest weight. You have to be careful to not get too much. It will make it difficult to start next time out...but is a very good oil to lubricate the engine with. I use it to assemble the engines.

Basically you want an all synthetic oil a light weight oil, and not too much if you choose to after run your engines.

The fuel I choose to run Cool power 30% heli fuel has a very good oil package and I never after run my engines. Now I'm in a dry climate Arizona, but I keep my models and engines in basically climate controlled. They live inside and don't go through hot and cold changes. Specifically the cold temps and humid air can lead to moister getting into the engines.

The procedure to use is run the tank dry while the engine is at idle. Keep trying to start the engine until it will not run anymore. Keep the rpms only at idle...don't throttle it up to make it use the fuel faster. You are running it lean by running it out of fuel. So keep the engine happy and do it only at a low idle.

Then add your few drops of Ultra Oil to the carb and turn the engine over a couple of times to distribute the oil. Next disconnect the fuel line from the engine and plug it. This will keep any fuel or moister from the tank from creeping into the regulator housing or the pump on the DZ engines. The engine is ready for long term storage.

Troy Newman
Team YS Performance