Recently purchased a bottle of M40 at an O'reilly's Auto Parts. There computer showed one bottle in stock, but no one knew where it was at. The found it in a back room and it was "dusty". When I started to use it didn't look right. It appeared watered down and a little separated. I mean the liquid appears to be two shades. The smell, if any is industrial. My question, is there a shelf life on M40. I stopped using it after a small application, or would it be good to go.
Thanks
Thanks
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