Jeff I don’t know about bulk Yamalube, but do yourself a favor and research Pennzoil XLF and Premium plus for HPDI’s (lots of info on the Hull Truth). Several guys have said their Yamaha mechanics turned them on to it.
It’s all I run now in my HPDI. Less smoke, less fumes, better cold weather performance, less carbon, smoother idle etc compared to Yamalube
It’s around $18 a gallon
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