Hi and welcome from North Dakota. You have a very nice machine. Take care not to put stuff on the decals to take them away. Yes that dirty old oil is hiding in every nook and cranny and till it all loosens up it won't go right. Don't force or you might break something and then will be no good at all. I used Tri flow on my machines and it didn't take long to get that old oil going out to clean with swabs or cotton balls, toothpicks to clean some of the gunk off. Amy