Originally Posted By: ARCOgraphite
Irrelevant. As is the vacuum sales parlor-trick data "advertisement" presented by EoM. Any Engineer or statistician would puke all over that so called data; especially noticable to the layperson will be the "doctored" lighting in the piston photos (overexposed for the supposedly superior Mobil Product). Not saying the Mobil oil is a bad product - just the DATA is irrelevant. Again, as I stated previously: GO BY SPECIFICATION LIST and Certification. Mobil 1 0W-40 is a spec-rich oil and one of the best on the market under 7 bucks a qt. No Big Quibble there. AFA wear rate is question, GM and Ford did oil tests (with the white paper excerpts presented many times on BITOG) that show USED oil provides a lower wear rate than new. Also, It is well know in racing circles (and by experienced tribologist) that high detergency contradicts antiwear (Go to the Brad Penn site). I mentioned changing oil out EARLY as not beneficial to longevity - I'm sure your (statistically irrelevant) high mileage engine didnt have overly short 3-4K mile OCI with high detergent, high TBN synthetics. I also did not state the increased wear impact - could be 10%, could be 30%. That would still put you over 200K miles service life.
I will question your agenda by prominently posting and defending EoM products to a zealous degree. Whats up with that? Hopefully you are just an excited EoM fanboy and not a Big Oil Co. stooge posing under a Sheeps pelt. And no, none of have much relevent data to share as the automanufacturers and oil cos play these card close to their vest. Some of the university studies that habve been "leaked" are eye opening. I always encourage all to do your OWN comprehensive research - dont go by anything you've read on the web without cross-checking. That would be lunacy.
My agenda?
LOL!
Well now! My statistically irrelevant data is still more than you've provided at this point, wouldn't you agree?
My issue stems from this statement:
Quote:
I would never generalize that American "synthetic" offers anything other than maybe a 50% extended service interval but with likely INCREASED wear rate.
But then you've stated this:
Quote:
Mobil 1 0W-40 is a spec-rich oil and one of the best on the market under 7 bucks a qt. No Big Quibble there.
So when I buy Mobil 1 0w40 at Canadian Tire, it is then an "American Synthetic", is it not? Now before you reply, I am aware, that, like GC, it is a "Euro spec" oil, but so are many of Mobil's other oils.... They all have a number of Euro-specs. The 0w40 of course is the most decorated due to its brand affiliations.
Mobil changed (I believe the transformation completed from what I recall reading recently) to a global product line. Meaning that the oils we buy here are the same as those sold in Europe that share the same name. They are the same as those sold in Australia. And everywhere else in the world.
So at least as far as Mobil goes, making the distinction regarding North American oils is what is truly irrelevant. Though I do believe it applies to a few of their peers who still vary their products between continents.
I don't think I am defending ExxonMobil in a manner one would call zealous. I have no affiliation with the company, just roughly 15 years experience with their product in a host of Ford engines with good results. So when somebody starts tossing around terms like "increased wear" without any data to back it up.... It makes me ask questions. Questions which you seem to feel are irrelevant, but I don't think are. I'm sure many on this board are keen to read up on other people's real-life experience with a product. I know I am! But your experience, as far as I can tell, is just a bunch of broken engines.... regardless of the oil. Yes, you've made reference to "leaked" studies... but state that there isn't much relevant data due to the oil companies and auto manufacturers being secretive? And if this is the case, then what more than paper spec's and our personal experience that we share in this forum do we have to go by?
BTW, I'm already over that 200,000 miles of service life
And she's got no signs of slowing down any time soon, LOL! So I'm not sure how that's measured.... If it is "like new" at 200,000 miles, then is it just going to magically start degrading?
Oh, and to answer your question, the oils were likely high(er) TBN, OCI's were 10-12,000Km; 6200-7500 miles. I have run every grade from 0w20 to 5w50 in it. Currently has 5w40 in it IIRC.