Thanks Steve. Can you give us a general idea what kind of riding was done in the 6500 miles?
Interstate, highways, city
Speedy or regular riding/rpms
What oil filter brand and was it cartridge or spin-on
The oil had about 1100 miles of commuting, 12 each way. I take it easy in the am as it is dark out, but I'm not afraid to let 'er sing on the way home, two lane rural.
5400 miles on a trip, probably about 25-3000 mi upper 70's loaded with camping gear, the rest except for about 150 miles of twisties, was about 60-70mph thru two lane in Ontario. About 1000 miles of slab was at 90 degrees++.
Cart filter, K&N, from Murphs', of course.
I'm using the Rotella syn this time. I intend to sample it at 8k miles and see if there's a difference.