Originally Posted by ticopowell
Great info! thanks for the work, but a few questions for you...
Am I correct in assuming that the same concept applies to my 5.0 engine? and also I assume that any full synthetic, Amsoil, Royal purple, etc.. will have the same effect on performance?
Your results will be the same. The only car I use Amsoil 5W-20 in is my 2012 Ford Focus, since it's only a daily driver grocery getter than rarely sees higher than 4,000 rpm.