18,367 unknown oil
19,305 SYN3 HD filter (I think these are Wix 51215)
20,089 SYN3 HD filter (short oil run because replaced oil lines)
22,103 SYN3 Wix 51214 (same as Wix 51215 but a little longer)
24,061 SYN3 Wix 51214 (1 quart make up oil added)
26,957 Valvoline VR-1 conventional 20W-50, Wix 51214
At 21,916 adjusted primary chain from 1/2" to 3/4" play.
I wonder why the VR-1 is thinner. Both VR-1 and SYN3 are SUS of 98 on VOAs.
These use a Sportster motor with a lighter flywheel, higher flowing heads and cams, higher compression pistons and fuel injection. K&N air filter.
They develop their power at higher RPM, but I think the wear should be pretty similar to a regular Sportster if it's driven sanely, which I do most of the time.