oil analysis

Durb wrote:

Turtle n Peeps wrote:

Huntindog wrote:

bfast54 wrote:

Turtle n Peeps wrote:

bfast54 wrote:
When I get back from this next trip I may consider just changing the oil filter and topping it off because I'll be probably around 7000 or so miles Maybe a little more.

Why? :h

Why not go with the recommended 10K your oil analysis company is recommending? They are the experts and you should follow their recommendations. If you don't trust them, then why use them? If you do trust them then why not follow their recommendations?

Okay Apparently you didn't read it well...

the 10,000 miles that they recommended is that I check it again at ten thousand and see how it is ---now I know darn well that oil filters catch things ----that's their purpose so if I can catch any particles and get rid of them and put a new filter on that --I know I'm money ahead and it's only one quart.

There is a common misconception that a new filter will filter better than an old one. That thinking may have had some merit a long time ago when motors ran a lot dirtier than today.
If a filter becomes totally clogged, then a bypass valve will open letting unfiltered oil circulate.. But in today's motors, something would have to be seriously wrong for that to happen. So barring that, a used filter will filter BETTER than a brand new one.

Dog, I tried to explain this many times in this forum but some of the sheep here would have no part of it. I also said the same thing about fuel filters with mostly the same reaction. And fuel filters don't even have a by-pass. :R

Interjection from one of the sheep here. I assume you never change your filters as they just become more effective the dirtier they get. Possibly filter manufacturers should sell used filters for a premium because they filter better than a new one. You might have been the same one that postured that dirty oil was better for engine longevity than clean oil. Fact is, one doesn't know when a filter goes to bypass. It could be when the oil is more viscous when cold or the filter is really dirty. Some of the bypass valve designs I have seen supply oil directly to the engine from the dirty side of the filtering media. The valve will close and the filter will catch the dirt on the return trip then might open again. Please continue with your urban myth, I will continue to change my filters.

Wolf here: You need to go argue with CAT or Toyota. Cat said for years to run your machine until you feel a power loss. Why? Because their engineers knew the fuel filters got better over time until they got fuel restrictive. Or you can argue with Toyota. They recommended for years to change the oil filter every other time. Why? Because they knew the filter got better over time.

No urban myth for me. The fact "you" might not know when a by-pass is opening but "I" knew when a by-pass is opening. How? I delete them. You see, I never ran them on my turbo engines. You see, by-passes are for sheep that can't read a gauge.

I never wanted unfiltered oil to circulate in my engine even as remote as that might become. So I would pull the relief valve pound out the spring and put a bolt in it's place. Done.

In those days I ran the oil to about 7K and called it a day. The turbos chewed up the oil pretty good so I didn't press it. NEVER once did the oil pressure drop. If the filter plugged up any amount worth talking about the OP would have fell in the basement due to a restriction. That NEVER EVER happened!

I really don't care if you or anybody else changes your filter every 100 miles. Knock yourself out. People like you make the economy better and I appreciate that! :B