Well, I picked up a couple of the No-Toil cleaner/oil/rim grease kits at the local bike shop. They had them in the bargain rack under the Kawasaki label for $7.99 (when the no-Toil label packs were $19.00). I'll give it a go and see how it does.
This has been an interesting discussion I must admit. The only I noticed personally is that the Bel-Ray Foam Filter Oil I have used is incredibly tacky. To the point where it strings off my hands when applying. It's darn near an adhesive... Given the observations, It would attract and hold dirt very well. I have my doubts about the Bar oil's or engine oils but I will look in to them for future use. I may just give the Bar oil a try with my old filter though, just for grins. I like the idea of leaving a large bucket of solvent in the shop for quick cleanings.
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The easiest and least messy way to oil a foam filter after cleaning, is to put it in a plastic zip lock bag, add a few oz. of chainsaw bar oil, close bag and massage oil into the filter. Once the oil is absorbed and well distributed, move the filter toward the bag opening and squeeze excess oil into the bottom of the bag. Hold the filter with the bag open and slip the filter basket into the filter ensuring that it fits properly. That will help reduce the amount of handling involved. By the way, you can get summer weight and winter weight bar oil. Summer being thicker. It's usually around $3.00/litre.