Quote:
Originally Posted by tarbe
... I believe you will have a tough time getting a good sample out of a used oil extractor.
Tim
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I know he will. Your best bet, if you're serious about your oil samples, is to just install an in-line sample port right at a 90 degree bend ahead of the Frantz filter, so your sample hasn't already run through the toilet paper. I use this method for my Trabold bypass filter on my Saturn, and plan to use the same set-up on my 300D and the wife's Kia when I get around to installing Trabold filters on them.
The port is triple sealed with a cap and valve to keep the samples clean while they are taken, and the brass nipple that threads on to the port uses disposable nylon tubes. I use a new nylon tube every time I take a sample, and route it directly in to the Blackstone container, then clean the brass connector with brake cleaner and compressed air before sealing it in a bag so it's ready to go for the next sample. As a result, my samples are not only consistently free of contamination, they can be taken while the motor is running without need for a drain of the system, or the possibility of drawing oil from which particles have settled. The components for adding such a valve can be found for under $30, so it's cheap enough that there's no real reason not to do it, and have the peace of mind that only comes with knowing your sampling procedure isn't flawed, and providing false results.