I bought my first Sandcast used from a Florida dealer in 1970. I traded in my 1969 CL 450. I was 19 yrs old and owned the bike for 18 months or so.
I never remember changing the oil. Young and clueless.
I bought a new 1972 CB750 in the fall of 1971 and drove it for 21,000 miles. I changed the oil and filter every 3000 miles.
I used Castrol 20-50 Dino oil. I never had an issue with the bike at all.
I read some posts from the past that said Synthetic oil is no good for these bikes. I was thinking newer is better and changed from Dino oil to Synthetic @ 1000 miles.
Lucky I have only put a little over 100 miles on the Vic World with the synth.
I have not noticed any clutch slipping or oil leaks but plan on getting some of the Kendall GT as mentioned in the thread.
I don't know if I should change the oil then drive it for 50 miles or so then change it again, just to make sure all of the synth is out.
What do you think?
