Hello everybody,just redid top end,cyls.bored new pistons,lower end has about 700 miles on it.what i would like to no is i put redline 20-50 in it,ran it for about 1 minute.I was told that redline syn. was not a good idea,Also if its not a good idea can i drain the redline oil out and put the harley 20-50 back in ,I was told once you change to syn.oil you cant go back to just reg. oil.I thought the redline 20-50 wt. would be good for break in. Thanks.