Oil Analysis saved the Day - IMBOC
  • 3 Post By JackDW - 852
  • 2 Post By bullit4404
  • 1 Post By Tony Alonso
  • 1 Post By DavidMidgley
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post #1 of 5 (permalink) Old 03-06-2020, 09:43 AM Thread Starter

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Exclamation Oil Analysis saved the Day

I posted here a couple months ago that over Christmas I purchased a 2004 Monte Carlo Intimidator version with the Supercharged 3.8 with over 225K miles.

Based upon the results of an Oil Analysis that Tony posted, I thought it would be a good idea to get a reading on the 225K mile engine. So, I sent a sample to Blackstone Labs and got the results back.

The found coolant in the Oil. This engine (GM 3. are know to have issues with the Lower Intake gasket leaking over time. Blackstone Labs advised that is a common issue and most likely the problem here. (BTW, I was already aware that is this (and leaky valve covers) are common problems with these engines). Looks like I will be changing the intake gaskets (as well as valve cover gaskets and other items while I am there) in the near future.

This one test has proven to me the value of an oil analysis. They have discovered a potentially "fatal" engine issue before any outward symptoms showed up giving me an opportunity to fix it before it created major issues.

Thank you Tony for posting the information on the oil analysis and getting my butt into gear. I think this is even more important of high mileage engines. Next up, what will my +320K mile 4.0 ranger look like?
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post #2 of 5 (permalink) Old 03-06-2020, 01:10 PM
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Suggest you change the plenum and gasket. The plenums are notorious for cracking. It's quite a job to get in there, and the new plenums are not that expensive. With that mileage, it's a good idea to change the plastic bits out. Good luck! Nice catch with the oil analysis.
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post #3 of 5 (permalink) Old 03-06-2020, 01:40 PM
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Another piece of good advice...that I probably won't follow. If my '09 has an engine go at 31,000 when I know it hasn't been abused? (Given full synthetic since break in..changed every 5K or sooner when a year has passed, never done a burn out, etc.) I guess I'd just figure Ford built a piece of krap...

So far, so good...
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post #4 of 5 (permalink) Old 03-06-2020, 03:08 PM

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Awesome to hear! I gave up the "oil myths" approach to understanding what's going on inside the engine back in 2014 when I first got my 2015 Mustang GT and started getting the oil tested. I think it's invaluable tool just like a blood test is
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Tony Alonso
2001 Ford Mustang Bullitt - black, #1118, VIN 1FAFP42X21F213026
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post #5 of 5 (permalink) Old 03-06-2020, 04:49 PM
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Testing oil? I used to do that, when I had a buddy doing that commercially. Now, I drive them till they drop. But I do change the oil frequently. So far, so good. Everything I own is well over 100K, with the exception of the 01 Bullitt. It's rocking along at 77K and not touching a drop of anything. But then again, nothing else does either. Including the 94 F150 with 233K.

I did have a 01 Honda Odditty. Dang thing was anything but reliable.
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My name is David J. Midgley. But you doesn't have to call me that. You can call me David. Or you can call me David J. Or you can call me David Midgley. But you doesn't have to call me David J. Midgley....
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