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Just discovered I put the wrong oil in my oil tank. Supposed to be TC-W3 but dealer gave me wrong direct injection oil that says on the back 'not to be used with engines that specify TC-W3 oil. Have only used 1/4 tank of gas, engine seems to run fine but a little rich. Should I be concerned? What damage might I have done? I expect I'll need to completely drain the tank and system. Thanks for your thoughts.