Re: engine oil

[RSRBOB]

Yamaha chooses to limit the range of viscosity its oils cover for one main
reason. An oil has to have modifiers added to it to make it meet the specs of
multiple viscosities. Yamaha feels that the advantages of extending the
viscosity range are negated by the use of the additional modifiers. In warm
weather, you should not need any oil that has a viscosity of 10.
RSRBOB