That's true. But I'd suggest it is not recommended for "modern motorcycles" that are wanting to pump high pressure oil. Personally, I don't buy in to that "motorcycle oil" classification as it applies to our classic bevels. The lubrication engineers I speak to tell me that the major impact of reduction of ZDDP for classic engines is in breaking in a flat tappet engine...beyond that it is a fairly trivial difference. You pay a premium for "motorcyle engine oil". I have no connection with Penrite, but I use these two:Just thought I'd let you know that the Penrite HPR 50 is an automotive oil, "Not recommended for motorcycles".
The HD Oil 50-70 I use for running in as it has a very high (by today's standards) ZDDP and the HPR 50 I use for operating afterwards - still high, but more affordable - $36 for 5 liters.
Last week it was time to take the head off my 250 desmo twin filler to set the valve shimming after it's first 3000km. These red line at 9K+ rpm, and you don't run these at less than 4.5K+ cruising, and you dont change gears much under 5K rpm, so they get a work out at the top and bottom end. I'd run HD Oil 50-70 for the first 500km and HPR 50 for two cycles since then. The top end rockers and cam (which were new when installed as part of the rebuild) were pretty much pristine. That's good enough for me.
I agree with radecal's comment:
That being said, I don't think you need to break the bank to do it (yet!)Bottom line, change oil regularly and use a good grade with proper ZDDP levels and the bevels will be happy.