I agree 1000%. If Amsoil is bad so is EVERY SINGLE OTHER SYN OIL BRAND. This is the biggest anti Amsoil statement I've ever seen.
I've been using Ansoil in every single vehicle I've ever owned for the last 30 years = without one single problem.
I sure would like to know what the big difference is on the 2020 CVO Trikes
Typical dealer BS imo. On my 2007 CVO I had a lifter fail and grenade the 110" motor. Tech and service manager blamed it on Mobil 1 V-Twin 20w 50 oil I was using. Said they'd seen several motor problems and common denominator was the Mobil 1. BS because while I didn't know it at the time (and perhaps they did not also) early lifter and cam bearing failure was rampant on the 110" motor and to a lesser extent on the 103" motor which I know because it happened twice on my 2012 CVO with the 110" motor and I had quit using the Mobile 1 'just in case' but that didn't stop the problem.
Fortunately I had no problem with H-D ESP honoring the warranty as this just came up as an aside while we were inspecting the damage to the motor.
So imo forget what a dealer may say and use any oil you want as long as it meets current specs.