Another dealer told me about this guys luck with AMSOIL in his Saleen and Cobra so I emailed him to get the details. This was about 2 years ago but thought I would post here. I think he was using the 0W30 but the 5W30 brings some equal comments all the time too.

On a new Saleen Mustang with 3000 miles on it switched over to Redline Motor Oil thru-out ...engine, T-45 Tranny, and rear diff. For 5000 miles. Engine oil was very dark and I blew the shift fork out of the tranny during this time. After researching, based mainly on the 4-ball wear test, I converted completely to Amsoil.

I immediately noticed a 10# increase in oil pressure (on an engine with only 8000 miles) and that the engine ran 25 degrees cooler. Tranny was MUCH smoother and ran cooler, as was the rear end. I now have 12,900 miles on the Amsoil with total satisfaction, and the oil looks cleaner than after running Redline 500 miles. I, unfortunately did not do a dyno test with Redline in, but the "seat-of-pants" dyno says I gained a little H.P. also. Absolutely no one could talk me into using  any other oil! Seeing (and feeling) is believing!

Don Oats - Richardson, Texas