Have been reading several threads on whether there are differences between the various brands of TC-W3 oils and talked to local boating places. Most everything I've read/heard is opinion ... haven't seen/heard much facts/test results. Too much conflicting "advice" to be really helpful & I'm more confused now than when I started. I can't always get Yamaha brand oil (I have a 2000 Yamaha 150HP), don't want to risk an expensive motor on cheap inadequate oil, and the contraditory advice I've heard/read tells me:<br /><br />1) I should stick to Yamaha brand because they specify unique additives in addition to meeting TC-W3 requirements;<br />2) Any oil from an engine manufacturer should be OK because they all use comparable additives, but stay away from refinery/store brand oils because they meet minimum TC-W3 requirements, don't include additives, or include parafin in their recipe;<br />3) Penzoil Synthetic is as good as it gets. The non-synthetic Penzoil marine is the same oil used by the engine companies and is far better than Lubrimatic or WalMart brands;<br />4) It's OK to mix synthetic & non-synthetic oil and I should never mix synthetic & non-synthetic oils. <br />5) Penzoil makes the WalMart brand oil & the 2 oils are the same.<br /><br />Does anyone know the "facts" or a place to look?Help,please ... the topic seems so popular that I'm sure others would appreciate also. Thanks much.
