Dredging this thread up to add a data point. Yes, I went almost 10k on the original oil. No, my engine hasn’t exploded yet. The viscosity is a bit lower than I hoped so I’ll probably switch to 5k intervals now.
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Update: 2nd Blackstone Oil Analysis Results (2.7 Bronco) @ 4,000 miles (3000 on Oil)
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You should consider switching to a lab that uses gas chromatography for fuel dilution testing. Blackstone does not and therefore the results are very subjective/inaccurate.Dredging this thread up to add a data point. Yes, I went almost 10k on the original oil. No, my engine hasn’t exploded yet. The viscosity is a bit lower than I hoped so I’ll probably switch to 5k intervals now.
The viscosity is into the 20 grade viscosity range (5.6 to 9.29) and (speaking for me), I would not want that in a HO twin turbocharged engine for any length of time.
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Interesting. First I’ve heard that suggestion. Considering both of my vehicles suffer from fuel in the oil…
I figured Blackstone was the gold standard. Guess I’ll search other labs. Didn’t really consider there were others offering the same service.
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Go for Horizon/Polaris. Blackstone is good for an "average" UOA and for many it's good enough, but I want the latest ASTM methodologies and testing processes along with gas chromatography for fuel dilution.
Blackstone is typically more expensive and charges extra for TAN or TBN which is included with Horizon/Polaris.
I buy my kits from Amsoil and they are about $23 each with a preferred account. Polaris has labs in 3 or 4 places in the US.
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Do you use the OLBTP test for $45?
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They used to tell us the altitude above you and the runway behind you is worthless, miss those days!
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No, I use the "06" kits (non pre-post paid) kits. I typically send a couple at a time to save on USPS flat rate shipping costs by combining shipments.
https://www.amsoil.com/p/oil-analyzers-test-kit-non-postage-paid-oainppkit/
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These kits are specific to Horizon/Polaris?
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Correct. Polaris is the lab behind Amsoil's UOA kits and Horizon is the software.
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