Gentlemen, I refuse to take my vehicle's to the dealer or a "Jiffy Lube" type oil change place for a number of reasons. True story to follow! I worked at a large paper mill here in Michigan up until 2009 when they shut down for good. Working in the maintenance department, I was tasked many, many times over my 17 years there to unload the lube oil tanker truck that usually showed up roughly once a month (Mobil products too, incidentally) This tanker truck had a hose on it about 50' long the driver used to connect to our riser's that directed oil to a variety of different storage tanks. Usually around 4,000 gallons or so. This oil was what Mobil called PM 220, a paper machine specific lube oil. Now this truck had other oils on it too, for other customers, such as several oil change places, the local Ford dealer etc... It had several different storage tanks on the same truck. The vendor had high turn over as it seemed there was always a "new" driver every few months or so. After pumping our oil out, they were supposed to purge this 50' hose out and quite often that just didn't happen. As such, the next customer, whoever it was, got about 10 gallons of paper machine oil in their tank. Now, most of these other customer's usually had about a 200 gallon or so order. So I ask you, is there any large industry close by where you are getting your oil changed? Do you know what is in their bulk oil tank? I'm betting you don't.