[Frank Lee]

In Hawaii I suspect the "5" or "10" doesn't come into play a whole lot. It is the "30" that counts most.

Annual oil change at 5000m/year seems reasonable. Unless you run a severe service schedule of constant "cold" starts 'n' stops and never let it warm up an annual filter change with the regular filter should be more than enough too. One of my vehicles, in fact, recommends changing the filter every OTHER oil change. I have several things with canister oil filters. The neat thing about them is you can easily see what all's in there without cutting stuff apart. OK in 35 years of playing with this stuff I've not yet seen a filter or canister housing anywhere near plugged up with gook- have you? I can't speak for anyone else, but I don't pour dirt into my engines- just oil. Oh, one time some SeaFoam to free up a ticky lifter. Also, most of my engines don't have any unfiltered crankcase exposure to the atmosphere, so no dirt is getting in that way either. Not dirt then? How about combustion byproducts? Simple- they are taken care of after short order when the engine reaches operating temp. What else is there? Wear particles? Of course... in itty bitty eeny teeny minute quantities that one stock filter over the entire life of the engine should be able to catch! Seriously, there is not going to be a pound of wear particles, or even 1/2 lb, or even probably 1 oz of those in there.