2010 Toyota Camry supposed to run synthetic oil, but conventional has been used
Hey there. so I bought my 2010 Camry in 2011 and my ex was a mechanic at a shop & put conventional oil in vs. synthetic. I've carried suit doing oil changes at multiple oil places between Toyota dealership & private garage & meineke. I asked Toyota if it was possible to swtich back to synthetic as we hit 116,000 miles & sounds a bit loud on the start. I googled the synthetic is best for the cold start/start up faze. The lady said at this point using conventional all this time may not be able to switch to synthetic & could shock the engine. Did I kill my car??