First, no matter what any of us may tell you, SYN3 is not a lousy motor oil. If you read the full set of tests posted elsewhere, you noticed that the overall rating for SYN3 placed it around the middle of the pack. In other words, there were some other widely known brands that rated lower. If you are happy with SYN3 and want to stick with it, then don't let a bunch of people on some website talk you out of it. As Gecko pointed out, failures actually
caused by motor oil are basically nonexistent in modern times, as long as the correct API classification and SAE grade/weight are used and changed at the proper intervals. If you want to worry about something, worry about the cheap Chinese parts Harley uses, not the motor oil.
Second, just like one size rarely fits all, one oil in all three holes rarely results in optimal performance. Engines perform under much different conditions than primaries and transmissions, and they all need lubricants formulated for their specific needs. Yes, you can use one fluid in all three holes, but it is not the best way. One oil in all three holes is a convenience and marketing tool, and isn't based on true engineering knowledge. BTW, does your automobile or truck use the same oil in the engine, automatic transmission, and the axle? Wonder why that is?
![confused5 :confused5:](http://www.cvoharley.com/smf/Smileys/CVO/confused5.gif)
Jerry