can we use synthetic oil, and what kind in our ds650's?

 

Well, the owners manual says that the synthetic oil is a big NO NO. I'd refer to it if I were you. I went with Castrol GTX 20W-50 in mine because in Southern California the temperatures can get up there.

 

Did you get that color flyer in the mail from Bombardier advertising their accessories? It listed new synthetic Bombardier 4-stroke oil. It may be shown on their website also.

I am using Mobil 1 15W50 full synthetic auto oil and haven't had any problems yet, but not all synthetics are safe...

 

That's a good question. It has been discussed here before with no definitive answer. The owner's manual states no. But at that time Bomb didn't sell 4-stroke synthetic oil, now they do. perhaps they have changed their tune, don't know.

What I do know is that I changed to Spectro 4 synthetic 20/50 about 25 hours ago. So far so good. No clutch slipping, no more oil foaming, no red light flickering. I am going to stay with this oil until I notice some negative results or information that I can trust.