03-03-2010, 05:05 PM
No, it won't hurt to run the higher grade (TCW-3) oil in either. Those older motors were not fussy with oil types. The newest motors howerver, are fussy. Merc's should only use the Merc oil, synthetics should stay with synthetics, etc. I have a friend who runs the TCW-3 Walmart oil in his 2001 Polaris snowmobile and it works fine. This is an oil injected machine. Costs a whole lot less than the Polaris oil. However, don't substitute regular oil for synthetic. You can go the other way though......synthetic for regular oil
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