Oil question...full synth to semi-synth?

[MCApex44]

Is there any problems to be concerned with going from Yamaha full synthetic back to the semi-synthetic? My brother goofed on the oil he purchased for this season and he has already had the oil changed.

 

[Triple X]

No.

 

[speedjunky]

you will have no problems.

 

[shanksyamaha]

Agreed!! You should have no problems with that.. Rider hard...

 

[Super Sled]

Ummmm, you may have some issues. The molecular bonding of full synthetic and conventional oils causes a slow starting but potentially deadly chemical reaction, which doesn't start until the oils are hot and combine, leading to a spontaneous explosion at approximately 57.2 miles. The phenomenon cannot be explained through science......