Thank you, panel. Most of us would rather never change the oil, but it's a reality in keeping your money maker making money.
"Every 100 hours and filter change every other oilchange"
My hour-meter broke the first month I had the chipper and has been stuck at 43 hours ever since. I change my oil intuitively, when it looks kinda grungy or when the weather is super hot and I'm asking a lot of the machine. Silver Blue gives a wealth, in a short space, that it's not only dirt (which a good air filter will keep from entering), gas dilution from incomplete combustion and water. Water is a product of combustion. As well, water comes in as humidity via the air intake.
Water is my main problem, much bigger issue than dark oil. You would think the running temperature of the engine would evaporate every molecule of water, but it's not true. My chipper engine has a long tube, into which you pour your fresh oil. When the temps are cool, this tube stays cooler than the engine temps, and water from the oil evaporates off and condenses on the inside walls of the tube as a white, creamy substance that looks like lithium grease. But it's water and whatever oil additives or detergents that keeps moisture dispersed in the oil and prevents it from recoalescing into pockets of water-water in your engine. The engine manufacturer told me this was unavoidable, happens to all air-cooled engines (loosly translated meaning ALL engines) and that it doesn't hurt the engine.
Hmmmm. That white, greasy looking stuff collecting on the inside of the oil tube will, when the temps get hot enough, 'melt' and flow back into the engine oil. This visual evidence doesn't happen in warmer weather, but I'm sure the actual process of the water being in there does happen. If I go too long, the oil will take on a slight opaqueness, and look slightly milky. Now it's time for an oil change AND filter.
I see merit on bigger capacity filters, or dual filters on the larger engines, but on the small, weenie engines like me and Stumper, frequent inspection and regular changes.
Hey, has anybody installed a petcock in place of the drain plug? A stainless steel ball valve? I understand the inherent potential dangers, but is anyone doing this? A valve, with a short tube coming vertically down off of it would allow you to stick that tube directly into the collection jug, open the petcock, and not a drop would be spilled. No need for funnels or tools. The wrenchless oil change. Anybody? -TM-