Product works great. Very easy to use. Comes in a nice carry case and honestly the best part is it gave me peace of mind and confidence knowing that in just a few minutes I would not have had a head gasket issue and not have to rip the engine. I tested it by drawing in my own breath and indeed the liquid turned the color as expected. I used it on a 6.2 diesel that had brown foam in the coolant. Turns out it was just nasty coolant and not oil as I initially feared! It's not cheap considering how much use the average handyman would get, but I think it's worth the money to be sure whether there's a problem or not. Also suitable for used car purchases! A quick way to assess the condition of an engine.
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