So I got an email today that says Amsoil is discontinuing their ACD SAE 30 synthetic oil. I never tried it, but always thought the specs were impressive. Especially the 4% NOACK rating. I always thought this stuff would be great for a 7.3 or 6.0 powerstroke as they are notorious for shearing multgrade oils. Anybody ever tried this stuff? Is is worth stocking up before it's all gone?