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[woodnthings8]

From previous post, most do not change the HPOP reservoir oil. I have done it a few times but not every time. Most claim it to be a waste of time. I do believe it helps a little bit because you do leave around 3 quarts in the reservoir and oil galleries when you do a oil change. This oil gets mixed with the new oil and you technically have decreased the new oils properties. Now is it enough to matter? Probably not, I have seen oil analysis reports where the person pulled a sample from the reservoir and the pan, and they did get different results. They were minor differences but they were different. I plan on putting in a by-pass filter for my oil and I think that will do a better job cleaning all of the oil which will make the high pressure oil cleaner. Obviously changing the reservoir oil will not hurt and could be done as a good measure for those that like to go above and beyond on their maintenance. I change my oil every 3k, so I overchange it to some standards, but I only put on 5k per year. I recently sent my oil in to Blackstone and they cam back telling me to run it 5k before the next sample.