I have to agree with seanhan. Don't confuse today's modern, high quality, high tech, Japanese, American, Italian, German, or Checkoslovakian built 2 stroke engines like the Tanaka, Mitsubishi, etc. with the cranky to start old timey 2 strokes of the past, or the Chinese made, low quality HT engines. Yes, you still have to mix the oil with the gas in the correct ratio or suffer a siezed piston/ruined lower end, but no oil in a 4 stroke will kill it just as quickly. Don't get me wrong, I love my Robin EHO35 4 strokers, but I would think long and hard about a Tanaka 40 if I wanted a little more power.