You guys are great! I have been having trouble starting my 1998 Yamaha 150 Vmax all season and the suggestions have bneen very enlightening. I have used the Yamaha additive, but maybe didn't understand how important it is to overall performance.<br /><br />Reading the past postings has been very informative. Regarding oil, I thought the TCW3 standard was good enough to guarantee proper performance. I am now wondering if I made a gross error while trying to save a buck. Have I added to the carban build-up by using cheaper Walmart or Penzoil oil?<br /><br />If so, what should I do now?