Just moved from Texas to Arizona and with all tools in storage I made the Jiffy Lube mistake. Driving home noticed oil pressure was slowly dropping the next morning on the way to work it hit 0 as I parked at my job. Towed to a AAA shop by AAA tow truck so I could stay at work diagnosed as a bad motor by the shop who only removed the oil filter to make that $10,000 diagnosis.. picked it up from the shop and 30psi starting up drove 20 miles before pressure hit 0 and parked it. Next day drove the rest of the way home 30psi starting 0psi when stopping. Also, did another fluid filter change after and the oil color changes to a dark grey color after just a few miles. Found the oil bypass valve bent all up like someone took a hammer and punch to it.Would this broken valve cause this problem? Or can I expect something major breaking due to oil bypassing the oil filter and starting to knock?