The guy who wrote that whole post states in the beginning of his story post he is a electrical engineer. So the whole post is just "his opinion" on how motorcycle things work. It's as valid as anyone elses, who types it up nicely on the internet. For starters, I wouldn't put much faith in the filter listings. It lists the same oil filter for a Harley Evo motor as it does for the twin cam motor. Anyone who knows about them knows the Twin cam requires a lower micron rating then the Evo does. Just because it will screw on the motor doesn't make them the proper one to use.,,