Would you like to purchase mine? I utilize my 2007 MS3 as a daily driver, but am looking to sell it and drive just the Miata. In support of your thought, you will likely find that those of us who have never had issues with our cars have relatively stock engines.
All I chose to add were maintenance and monitoring upgrades. STRI oil press/temp gauge, STRI boost gauge, spin-on oil filter conversion, aluminum shifter bushings, rear engine mount, Koni Sport adjustable shocks, trailer hitch (for bike rack), one set of summer wheels/tires, one set of factory wheels/snow tires.