I have not done an oil change myself on the Tbird, bike has been serviced by the bike shop for the first 2 years. The first 2 services they used Mobil 1 (900km after run in, & 12 month service). Just had the 2 year service & big bore kit installed at the same time. Just noticed on the receipt they have changed to Maxima oils, using Maxum Extra4 15/50. Not sure why, possibly just a shift in suppliers. Is anyone else running Maxima oils?
The old 1600 pistons & sleeves etc did look good though after 15000 kms on Mobil 1.