Not sure it is all that big of a deal if someone wants to change their oil more frequently. They are not wasting resources, unless they are dumping oil on the ground. All oil is recycled. Many company's main lube products are made from recycled oils. And they are good products. Northland is just one of a few companies that have done this for decade, and is well respected in the agriculture community. And we are not talking about changing 10 gallons at a time every month like in commercial trucking. An extra case of quarts worth a year is not going to make folks have to take out a second mortgage. Sure, it is not necessary to change that often, but not that big of a deal. Each person lives within their own comfort zone. Pick you change interval that makes you sleep well at night, use quality products when you change oil, and enjoy life. I go thru several drums of oil a year in all my equipment and vehicles and do not have the least problem with someone who wants to stick to an old 3000 mile oil change regimen. It is not my money. I don't brow beat them. I will suggest they can go longer, but if they choose not to, cool. They are no less in my mind. Maybe a little naive, but they will come around over time. But they are not wasting anything even if they changed their oil every other week. All oil is recycled, and what they spend goes right back into the business cycle. It is totally their call on what they want to do with their vehicle.