I used gun oil or clock oil, something very light. I don't know if I'll have to lube it more often but I think the bronze bushing should hold the oil for a while.

1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy