Paradise Garage's study

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Blue99

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GMorg, if you glance over the list of contributors to Brian Schuer's Oil Life Study, quite a few Bitog names show up on the list.

Brian frequently posted on Bitog under the 3 Mad Ponchos ID, although he has not been around recently. Search on member #856 to see his posts.

Also, if the term "spacebears" is entered into the search function, you'll see how many times the study was linked to, especially during 2003 and 2004.

The Paradise Garage synthetic oil life study has been discussed/analyzed/debated extensively, including the subjects of oxidative thickening of Amsoil, wear metals rates of old oil vs. new oil, TBN depletion & so on & so forth...
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I wish he would have kept going, I wish he had done a more contolled study, because in the end the only real conclusion is that doing extended OCI's will not ruin your engine. (admittedly his main goal)

It totally sucked that he didn't change the filter during the Amsoil test, but did during the M1.
 
It's unfortunate he didn't continue the repeat with the M1 as it looked to have even lower wear metals than the Amsoil run.
 
While that test was very interesting, the unfortunate thing was that it took too long. Even if he was still continuing it, the data would be meaningless right now since Mobil 1 and Amsoil have both reformulated since he did those tests. So he'd have to start all over again and by the time he finished, they'd reformulate once again too. It's a never ending circle.
 
wish they had kept going with sampling being quite a few of us had invested money it the test that never saw results for what was spent!! The next two samples were to be paid for with the money I sent in and will never see results for!!
 
I agree w/Patman that the generalizability of the results from his experiment are now [even more] limited, but I honestly wouldn't expect the results to be all that drastically different if you did the same test today w/a reformulated version of the two oils. The site, outdated though it may be, is still a good example of how you're not necessarily driving your car to an early death by extending the OCI a few miles.

I have read that site over more than once, yet just this last time did I find the "cave drawings" section! You should check it out if you haven't seen it. (Or am I the only one?)
 
I did a few searches on Paradise Garage and did not find a link to this study. It's old -ish, but I found it interesing. One car, UOA on M1 every 1000 miles for 18K and then switch to Amsoil and repeat. At end, switch back to M1. The data are confounded with make-up oil and break-in, but still it was interesting to see "real-time" wear over the life of a batch of oil. It was also interesting to see the effect of make-up oil. (you can get to the data via "Past Results" about 4/5 ths the way down the page)

http://neptune.spacebears.com/cars/stories/oil-life.html
 
Good point, Patman. But if he did buy enough of the same formulation it would of been interesting to see the decline in wear metals versus miles on the engine.
 
I noticed that TBN dropped like a rock in the first 2-3K miles. The slope (excluding make-up oil times) was fairly level after about 4K miles. Can anyone explain what consums TBN that fast, that early. Is this phenomenon similar to the apparent non-linear wear metal phenomenon?
 
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