122K w/o an oil change?

Yall may get a kick outa this one:

I use blackstone for oil analysis on my 01 Ford F250 Powerstroke.  When it was my daily driver, I had been running 10K miles between oil changes, and the lab reports were coming back that the oil w/ 10K miles on it exceeded minimum requirements for new oil.

You guys are right.............I know it..........but damn I can't get out of doing that often because I like seeing dirty oil come out, and good oil going in. I worked( still work, but on military absence) for Advance Auto Parts and get discounts on pretty much everything so I get Advance Auto Oil and Oil Filter and change it every 3k or so.

I pretty much agree with everything said so far, in my mind the thing is that oil/mile is so cheap compared to gas...  so at 3500 miles if we spend $35 on oil, that's 100 miles / $1...  gas at 20 mpg at $3.20/gal is 6.25 miles / $1...  if you change at 5k, it's 143, 10k would be 285... 

Again, I'm agreeing with everyone here, I had an amsoil double filtration setup on my old truck, but I'm saying that if your goal was to save money, longer intervals on oil really doesn't buy you that much in comparison to mpg...

So to me changing oil every 5k is pretty much cheap insurance (especially on the wifes car where there is +/- 2.5k on when it actually gets to the shop)

I've always had the philosophy that engines are expensive and oil is cheap. This is of course conventional oil. I've seen inside many engines that have had their synthetic oil changed at 15K intervals. That's to long. They develop sludge problems. I've pulled valve covers off and the sludge makes them look they are still there. I've also had to pull multiple oil pans and clean out the oil pickup screen because they get clogged from the oil breaking down. More than once I've pulled a drain plug and nothing came out. The oil pan had sealed itself. I had to poke through the buildup so the oil could drain. At 122K they aren't on the original oil anyway because the engine would have burned more oil than it holds in the course of 122K.  

83K10 wrote: I've always had the philosophy that engines are expensive and oil is cheap.

Ditto.  And that also goes for tannys, T/C's and R&P's.

What was the total mileage on that car in the pictures, John?

That's pretty bad.

I'm curious to how Blackstone would rate this oil. I'm not curious enough to pay for a sample to be tested. I'll look Monday to see how many miles are on this one. I see so many cars it's not easy to keep track of stuff like that.

I've seen cars as bad as Brad describes. I just haven't had a camera handy. We've removed valve covers and it looked like they were still there. I've taken a drainplug out and no oil ran out because there was so much sludge in the engine it sealed off the hole. Had to poke through it with a screwdriver to drain the oil. That vehicle had 53K on it. This stuff isn't going to get drained out even if the car is real hot when you change the oil. It's almost plastic like but it kinda crumbles into large chunks. I've had to pull more than one oil pan to clean out the pickup due to this stuff clogging it up.