I changed oil in primary,trans and motor...before I covered it up in the garage for the winter. I run redline in the primary and transmission and Bel-Ray semi synthetic 20w50 in the motor.....I also add 8 oz of lucas oil stabilizer in the crank case and about 6 oz of seafoam in the full gas tank. Battery stays on the tender all winter and every time I get home, I plug it back in. My 07 heritage battery lasted over 8 years. Anybody else here use lucas or seafoam and a tender for your battery?