Late to the topic, but blah blah blah. It's 3g Network vs Verizon. Ford vs Chevrolet. Democrats vs Republicans. Competition smack talk. Charts and graphs always show HUGE margins and words are used that most common people have to look up.

As a user of both oils, I can honestly say, I have given up using Amsoil for Valvoline FullSyn, bit still use RP in one of my vehicles. Proper research on the vehicle and the applied type/brand oil will get you further than word of mouth or crappy pie charts.