I've talked to some who use it and one CVO owner I know who has had lifter problems while using Schaeffer while the others have had no engine issues.
I do agree about the availability and if you are on a road trip and need an oil change.
I've been using Mobile 1 and have had no issues. But keep hearing from many riders how good Schaeffer oil is and has been for them.
Funny thing about that. There are plenty of people who have always run much lower quality motor oils than the current crop of synthetics, and they have had no issues either. You can most likely count on the fingers of one hand the number of Harley engine failures that were caused by the brand of motor oil, and have some fingers left over. And yet the advertisers have everyone constantly worrying about whether their chosen brand is as "good" as a different brand. These online forums probably have more posts and threads about motor oil than any other single subject. And if you read enough of them, you quickly find out that most people don't know anything more about the subject than what the advertisers tell them, but they will argue endlessly about how brand x is far superior to brand y. I find it amusing, until it just becomes sad.
Any motor oil that meets current industry standards and Harley requirements will give you decent performance, especially at the short drain intervals most Harley riders use. Brands that dump in larger amounts of certain additives and then advertise based just on the one characteristic those additives directly affect don't exactly impress me. A motor oil has many functions, not just lubrication under extreme pressure, and it takes a balanced approach to do everything well. Take a look at the famous (or infamous) comparison tests that AMSOIL ran a few years back, and notice how no single brand had the best performance in every tested characteristic. That's due in part to economics (cost), but it's also due to the fact that some additives improve some characteristics while degrading others. As I said earlier, it's a balancing act.
Shaeffer is a semi-synthetic product, not a full synthetic like AMSOIL, Mobile 1, etc.. That doesn't mean it won't perform well, it just explains the lower price. Semi-synthetics (or para-synthetics in Shaeffer terminology) combine Group IV synthetics and Group III mineral oils. Use of the mineral oils allows for lower cost and lower pricing relative to products that are 100% Group IV synthetics. They can be an effective way to get most of the superior characteristics ascribed to full synthetics at a more reasonable cost.
Jerry
PS. Iski, there is NOTHING better than Motorkote. Just ask Twolane if you don't believe me.