Quote:
Originally Posted by Surly73
I've used Blackstone a reasonable amount. They are the easiest to work with and well priced. Some have called into question their results or their test-to-test numerical variance from time-to-time but using Blackstone is leaps and bounds ahead of just changing the oil when the light comes on and doing nothing else.
Their analysis and commentary is not prepared by an elite industry specialist. If you have special concerns you need to partner with (and pay for) someone like Terry Dyson to add his expertise.
If you can get the sample - go for it. Just make sure that the sample is taken "mid stream".
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It's like drug testing for your car!
