I am draining all the fluids today...and all three had like pipe dope on the threads? I haven't seen this on any other bike I've owned? I bought the bike used and wonder if this is standard or some mechanic's extra measure to stop leaks? If so who else does this and what do you use on those threads when re-installing the oil plugs. I am enjoying the bike maitenance, my last bike a BMW was like working on NASA high tech machinery! I was afrais to touchj anything...this harley is easy to understand and work on!