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07-28-2014, 08:04 AM | #442 | |
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It didn't appear to hurt anything, so I would not be concerned.
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07-28-2014, 08:57 AM | #443 |
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07-28-2014, 09:38 AM | #444 |
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Oil gurus, here is my second report after 7700 miles. This time around I had both TAN and TBN analyzed. The first report was on 10w60, the second is on 0w40 Mobil 1. My usage/commute is roughly 50:50.
My TAN was higher than TBN at 7700miles yet BS is suggesting I try 9000miles on my current fill?
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07-28-2014, 12:28 PM | #446 |
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I wonder what the clearances for the cam/ledger bearings are for the S65. I notice rising iron in many of the thinner oil class analysis as well.
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07-28-2014, 03:21 PM | #447 | |
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The report looks fine other than that so I see no reason to do anything different. Just my two cents.
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07-28-2014, 05:03 PM | #448 | |
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I would have thought it highly unlikely - people in white coats are paid to check that the end product stays within spec. |
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07-28-2014, 05:57 PM | #449 | |
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There are always production variances and it's not something they're going to reveal. All of those ISO/QS certifications allow for it. Even Blackstone has a margin of error. If you're bored/curious, buy a bunch of bottles of the same oil (with different lot numbers) and send them in for VOAs. You'll see a range of values. Ordinarily, when you buy chemical or obtain a sample of a chemical from a manufacturer, they will include a certificate of analysis that lists various control parameters, and how they stack up against the required minimum values. So for example, it will say, "analysis: 25.2% solids, specification: 24-26% solids." In the absence of that kind of information, there's really no recourse that consumers have. Heck, even Lubrizol, the primary supplier of oils and additives, has huge ranges for what they sell. Science...is not always an exact science. Since there are no apparent negative effects, it's not worth losing sleep over.
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07-29-2014, 02:22 AM | #450 |
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Well I have to disagree...having worked quality control in various industries the very least a product must do is match its spec. If you are selling a 40W oil then it will be a 40W oil. Before final packaging (of a production run of 100,000s of gallons of oil) it will be someones job to take a sample and make sure it matches what it says on the label, in this case it will be that it is a 40W oil (and that it is in within all the other specs included on the labeling). The exposure by not doing so could be extensive.
If I didn't see the Mobil 1 going in myself then I would have a doubt at the back of my mind that they put something else in given its viscosity after only 1000 miles. Most every other Mobil 1 analysis has it in range after many more miles. Last edited by SenorFunkyPants; 07-29-2014 at 03:20 AM.. |
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07-29-2014, 03:54 AM | #451 | |
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07-29-2014, 09:11 AM | #452 | ||
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(I also work in quality assurance FYI). Quote:
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07-29-2014, 10:11 AM | #453 | |
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My point really was that the viscosity for that 1000 mile sample was unusually low for a 0W40 oil - could a tolerance of ~1 make that sort of difference? Bear in mind that it was also supposedly mixed with an amount of 10W60 from the oil cooler and lines. |
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07-29-2014, 10:26 AM | #454 | |
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Look at the whole S55 power debate. Engine rated at 425hp, but it's putting out more. Unless we know what the tolerance for Mobil1 0W40 is, there's no way you can say that if you buy 40W, you'll get EXACTLY 40W for 100% sure. And I think that's what dparm was saying too. Anyway carry on
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07-29-2014, 11:02 AM | #455 | |
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Will do another reading around December on the current M1 fill. If no improvement, I know what I will be using my tax refund for.
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07-30-2014, 06:51 PM | #456 |
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07-31-2014, 09:06 AM | #457 |
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08-01-2014, 12:22 AM | #458 | ||
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If the shoe fits wear it Has it not occurred to anyone the iron is from crank bedplate iron inserts. But don't worry Mobil 1 QC will get you at least a 30 weight in that bottle of 0w40. You're joking. My platinum tech has seen crank main bearings give in more than rod bearings, and he mentioned the turbo engines too ... No one changes their oil anymore he said (lease cars) and it's the easiest thing to do. If you would see any proper sign of a good S65 break in, it would be tin from the running in layer on the pistons. ....but lead, iron, silicon from sand casting? BS - are initials, right? LOL
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08-01-2014, 04:18 AM | #459 | |
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08-01-2014, 07:08 AM | #460 | |
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08-01-2014, 09:21 AM | #461 | |
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08-01-2014, 12:43 PM | #462 |
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The "40" portion is a range of values anyway. Mobil does publish the "typical" value on the website, but it's not going to be perfect every time. As I suggested, buy a bunch of bottles and pay for VOAs. Prove me wrong.
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