I wasn't going to say anything here unless it was somewhat constructive. I'm on the counter in an auto repair shop. To us, it's a pretty big difference if someone at least offers to pay. That means you recognize it costs money to have this place open, stocked, and ready to help you. Chances are, just like Cyclopath, we'll let some little stuff slide if you sincerely expected to pay. And sometimes it pays off down the road.
Not charging for minor stuff falls under marketing, basically. A lot of our trade magazines mention that if a customer won't buy something small (light bulb, air filter, fix a tire) chances are they aren't going to buy something big either. I don't always agree with that, some people can do the minor stuff themselves, but there is some validity. So if a potential customer walks in, expecting free right off the bat, it's not a great start. 
I'm also having a tough time with this "community of bikers" idea. Yeah, I agree a little, but when you go to the massive expense of opening your bike shop doors, it's a business. Perhaps it's a business you enjoy and are passionate about, but it's gotta make money at the end of the day. And like most shops, I'm sure Pure Energy sponsors riders, does goodwill events, etc... In other words they probably give back plenty.
And on a minor note, the "Captain Semantics" part of me would immediately say to the original question "you want to borrow lubricant? Are you going to bring it back, somehow put it back in the can?" A different original approach might have yielded different results. "Hey, I need just a little bit of lube so I can ride home, do you have some small packets I could buy or something?" Again, chances are they probably would have done it free.
Unless the mechanic is just a douche.😀