I've used it in my 250 and mix it 4:1 (4 quarts 10W-40 to 1 quart Lucas). I noticed that it would build up oil pressure faster on cold starts and idle smoother that just straight motor oil. I was impressed with it and will keep running it when I rebuild my engine this summer. I've considered using it in my 3 spd, but would like to hear a little bit more about it. Correct me if I'm wrong, but doesn't the bottle say that it is good to use in your rear end?
