Can Synthetic 2 Stroke Oil Be Mixed With Regular Oil

Just asking but why would you want to change from synthetics to mineral? If you cant stand the retching smell of the BRP synthetic just change brands..

I think any synthetic oil would be overkill in a 550 fan. No RAVE valves to worry about carbonning up.

A friend has a 550 cc fan cooled '05 GTX and wishes to use lower cost Castrol snowmobile oil.

Does he have to drain the reservoir first? Or can he just throw the regular Castrol oil in with the existing BPR synthethic oil?[/b]

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No, he does'nt have to drain the reservoir, all 2stroke oils will mix with synthetics 2 stroke oils. And BRP oils are manufactured by Castrol.

If an oil is TC-W3 rated, and most of them are, they will mix with one another. That's one of the criteria an oil had to pass to get that rating.

I have mixed and matched just about every kind of oil in my sled at one time or another. Never had a problem.

I've ran mostly Ski-Doo XPS Synthetic and Klotz, but have ran Polaris VES, Arctic Cat 50:1 and APV, Amsoil Interceptor, Dominator, Legend, Shell Advance, Citgo, Yamalube, Quicksilver, Pennzoil, and Valvoline in my sled at one time or another.

Just add when needed

MY SLED DID NOT GOOD WITH SYN OILS 670 COULD HARDLY PULL IT OVER . I WAS,NT FOULING PLUGS OR ANY THING BEFORE SO I WENT BACK TO DOO OIL.