Changed oil recently. Used Mobil 1 V twin. Everything went well. I have the electronic dip stick/thermometer but I still like to check it manually once in a while. After about 1000 miles the oil looks a little dark already. After a 1000 miles on my cars, the oil still looks new (light color). Anyone else notice this on their bike? No metal or strange smell, just darker color than when I put it in new.