We at this site, feel that marketing is a key factor when it comes to oil. Part of marketing is service. Now, consider this... Where are you right now? Here, why? cause you can get answers that are from different companies. Neat thing is, you get to know who the guy on the other end is, tell if he gives you the information you're looking for, helps with your issues, and that is what you need when you're looking for a place to buy oil. You cannot get that from a local napa or autozone as most people in those places do not specialize in lubrication just parts sales. So why not consider helping keep good dealers around on this site, by buying through them, because it is they (among others) that pay for advertising and time/effort put into working on here as a resource that helps keep information and this site free to you and everyone else.
Just like Bob, he takes the time to show with simple but interesting little tests on the basics about oil, helping people understand how and why's. The reason? Because he believes that knowledge is power and the better a person understands the why and how's of oil, the easier for you to make an informed choice. That too is what all of these reps hope to accomplish, to help inform and educate, thus making it easier to chose what you want.
So, by all means keep in mind what this site is about and how it is/has helped you and consider how you and others can help by supporting all the work done by everyone. If you are going to buy the product, then it really isn't going to cost much if any more to use these guys than to go to the local guys. It's a win win for everyone. I have noticed that there is many others on here that keep recommending going elsewhere because of price, but in the long run, its not price its service and help, which you can't beat from these guys.
Thanks for taking the time to take these issues into consideration.