Best full synthetic oil in 09 yz450f?

:ride:

Run Rotella in your dirt bike for 3-4 hours, then send a sample of that to Blackstone Labs. When you get the results back, look at the measured viscosity at 200 ℉. :lol: Then laugh.

Anyone have an opinion on maxima extra 4? It's what I was planning on using. Opinions?

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