August 17, 201410 yr Well according to those that should know, YZF600R forum, it should be semi synth 10/40 oil and 10/40 fully synth if your racing. Putoline super Dx4, Castrol GP, Motul 3000 20/50 if it's a hot climate, Rotella 5w-40 with Mobil 1 M110 filter. Hope that gives you some ideas. Most of this was from the USA so should be just right for you as your in the LONE STAR state.
August 23, 201410 yr The owner's book shows the following chart: Recommended engine oil grade: API service SE, SF, SG type or higher. These are my suggestions: For standard use (semi synthetic): Motul 5100 4T 10W40 or Yamalube 4T 10W50. If you're going to race (fully synthetic): Motul 300V Factory Line 10W40, Mobil1 Racing 4T 10W40 or Castrol Power1 Racing 4T 10W40.
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