Originally Posted By: TallPaul
Filter elements seem to be progressively dirtier from left to right. It would be interesting to look at the next few filters after the last rinse cycle.
TP, I actually JUST threw all my opened filters out about a month ago when I cleaned up the clutter in my shop. There were little to no deposits in filters after that one until I started maintenance doses. There were still deposits in the engine, and truly, there are still SOME deposits in the engine. But this is a design flaw. It's just a ridiculously tough engine on oil, even after six PCV system updates from SAAB. But between the newest updates and arx maint doses, I sleep easy at night. I use a piece of straightened coat hanger to scratch against the pickup screen to check for deposit build up but it never has been clogged. So the deposits arx removes are just fine enough to make it through the window mesh-like pickup screen.