Quote:
Originally Posted by thejeremyman9
This sample collection is contrary to what Blackstone labs recommends and what i have always done. Only once did i try and extra oil from the sump (from a car that actually has a dipstick).
The normal collection procedure involves driving the car to get the oil circulated and up to full temp, then doing the oil drain as normal for an oil change and collecting the sample mid-stream (i.e., not at the very beginning or end of the drain).
It doesn't make sense to me why you would want to avoid historical wear? Plus, that should have been captured by filter, reduced by recent oil changes, etc. I doubt you will be able to get anything going in from the oil cap.
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Makes sense to me capturing a sample mid flow, I only had an oil change done in December, but I guess I can always capture the oil and put it back in and just top it up ?