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My Blackstone Labs Report Just Came In And...

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Old 03-03-2008, 07:18 PM
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Default oem filter doing it's job. I'd cut it open and inspect for gunk. No TAN or TBN, but wear looks good.

Long driving cycles rather than short trips? What fuel do you use, btw. One single brand? What climate and are you garaged?
Old 03-04-2008, 05:46 AM
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Default Re: oem filter doing it's job. I'd cut it open and inspect for gunk. No TAN or TBN, but wear looks g

Yes, long driving cycles. I live in Manhattan and have a house in Upstate NY. I go there every weekend. 130 miles each way. Don't drive it in the city at all. I always use 93 octane. Park the car outside.
Old 03-04-2008, 05:47 AM
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Yes. Does it matter?
Old 03-04-2008, 06:55 AM
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itmust be the highway driving then, city driving really tears the engine up
Old 03-04-2008, 07:33 AM
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Default 2nd. I should send mine once just to see what they say. I do my oil changes ever 3K though.

99% of my drving is light to light, in Chicago traffic.
Old 03-04-2008, 11:24 AM
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not so much city driving as much as short trip cycles of cold->hot->cold. Taxis have low wear.
Old 03-04-2008, 11:27 AM
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Default Should be ok w/sludge then, but wear particles can be trapped in sludge & UOA shows low wear.

Particle count, TAN and TBN are needed for a thorough UOA. I'd cut the filter open if there was any question about sludge with short trips or whatever. You should be good though. The Pentosynth is working for you. I'd run a bottle of Auto-Rx, none-the-less.
Old 03-04-2008, 11:07 PM
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taxis are also usually iron block V8s that can take a hell of a beating
Old 03-05-2008, 06:59 AM
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Default All idling & light throttle is"beating"?What I call beating's soccer mom/ricer cold hammering it

I just have to stop this on 2 points. One is mixing different engine types into any analysis. You have to just compare a single engine over different driving styles. Second, are we defining "beating" as excessive wear? If so, city taxis have low wear rates. I have seen two studies on oil that were totally bogus because they choose such a low-stress test bed, taxis. 80% of wear is over start and warm-up. Add in sludge from short trips and I think I'm on firm ground.
Old 03-05-2008, 07:08 AM
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Default You don't take cabs often, do you?

"Light throttle" is understatement of the year. They race from light to light, at least here in Chicago.

Also, idling...doesn't excessive idling polute oil with gas?

And finally, why bring up Taxis when in US at least all taxis are Crown Vics?


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