Thanks for that info, George. Glad sumbody else besides me gets things mixed up at times. Lots of things I like about using synthetics or blends, but they sure cost more. If ya get more, that can be OK, but if, for example, using the dino Rotella 15W-40 and changing a bit more often costs the same as using the higher cost stuff, and both types give good protection under our conditions and expected service demands, I have to wonder.
I've been intending to sit down and just do some projections on current costs for dino and synth using the same filter and figuring costs based on reasonable mileages for changes. Be interesting to see what the costs per mile would be and how they compare. Not sure if this would be a productive way to spend time. Especially if I've got other more pressing things to do, but maybe I'll get to it one of these days. If I do, I'll let you know what I figure.
One thing's for sure, with all our talk and speculation and experience with oil and filters, barring possibly using an energy conserving product, there seems to be little trouble that results. How long has it been since anyone has heard of an engine, especially a Wing engine, that has failed to give service specifically because of an oil or filter related problem (one that can be proved)? There are not many engine problems that occur across the board for any cause, and very few catastrophic failures. And you and I know that there are some that have and are running for many thousands of miles that are ridden by folks who pay scant attention to detail with regard to oil and filter or air filter changes. If it starts, they mostly just ride, and some flog the dog out of 'em. Pretty good motors, eh?