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djo269

changing between yamalube oil question

4 posts in this topic

I have a 03' YZ450. The guy before me(1st owner) only used Yamalube 4R 10W-50R semi-synthetic racing oil. I bought a case of Yamalube 4 20W-40 from Rockymountainmc.com because they had a reasonable price.

Would I be doing this bike a disservice by doing so?Any performance problems?

I really would like to hear from my Yamaha colleagues to know what you think...:bonk::thumbsup::thumbsup:

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No issue...I'm getting ready to do the same thing, but I'm going the other way and switching to synthetic oil.

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probably not ive used 20w40 yamaha oil in my 2000 426 my 02 , 04 with no problems at all . on my 04 450 i started with the 20w40 then switched to amsoil synthectic for 1 season and then had to go back to the yamaha oil ( we lost the amsoil sponsor) but the bike never had any problems with switching oils .now im back using the 20w40 in my 06 450

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Change the oil frequently; 5-6 hours max. Yamalube does not retain its high temperature viscosity particularly well according to testing I have seen.

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