Not watching what I was doing I put a half gallon of 2T full synthetic brp oil in my ficht Di outboard. There was 2 gallons of xd100 in the reservoir. I use xd 100 simply because many say its the best for carbon buildup in the old fichts. I might have the last running 1999 150hp. Need it to stay that way at least through this season. Should I dump the reservoir or are the oils compatible?