So I've got my uncles 84 FXRP that's sat for 6 years. I need to get her running! Oil needs changed. Pulled the plugs already and poured 2ish oz of Marvel Mystery Oil right on in. It will have sat for one full week with the MMO in it when I change the oil. Got a few questions... 1). Should I pull the sump plug and drain the sump out as well? Is this going overboard? 2). How much Marvel Mystery Oil should I put in the oil tank with the oil I'm pouring in(Don't worry, I won't ask what the best oil is... been lurking... don't want flood gates to open! LOL!!) 3). Is 5th gear a good one to use when pushing the bike around in gear to get the oil flowing before firing it up? Which gear would be better? 4). After I drain my gas tank and refill it with non ethanol premium should I use seafoam with Marvel Mystery Oil or would that be redundant? I love this bike and don't want to harm it during it's resurrection!