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Old 04-30-2009, 10:03 AM
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patrickt patrickt is offline
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Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
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Quote:
Originally Posted by elmariachi View Post
Just curious, how you can say the results are wrong, but then rely on the zinc/phosphorus numbers and the absence of coolant?
That's a fair question! For the zinc & phos numbers I only look for a range, as the BP people swear to me that it really does have 1200ppm. If the numbers had come back anywhere from 1000 to 1900, that would be fine. If there was any moisture in the oil, I'd send them another sample to double check it (since it's still sitting in plastic containers in the garage). Same if a metal came back really high. The accuracy reports come from the forums on BITOG, Pelican, LN Engineering, and what not where VOAs of the same oil come back with significantly different values or where guys send the same sample to two different labs for comparison. I've only sent in a handful of samples myself, and honestly some of the accuracy problems could be the result of the user's method of oil collection. But, I suppose they're just like blood tests -- double check them before you sign up for the operation.
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