6300 miles on an 03 Suzuki VL800 805 cc w/c, 2200 mi oci and the Rotella is very dark in the sight glass after 100 miles. I had a 10-40GTX/ 10-30 Amsoil 3/1 mix in for the 2200 miles. P/O had a brand name racing oil in when I bought it.
Should I be concerned about the dark color ?
Should I be concerned about the dark color ?