I road my 2000 Warrior hard for 5 hours last weekend. Personally my longest ride with this quad. My low-end would evaperate water when ever it was coated. Is that normal? We had 2 other Warrior riders with us and theirs wasn't doing the same. Yes, it had oil but it was difficult to get a accurate read while in use for several hours. Even though I only have 10 hours in current oil I'm going to change out for OEM recommended Yamalube 10w 40 All Purpose SAE Synthetic.