And let's not forget that early Aircooled Beetles 1926-75 ran without a filter... just a screen and magnet.... And by 1961 / 1200 cc 40 hp started lasting 100k miles!! IIRC Oil Change was 3k miles... Matt Nall Charleston, Oregon http://tinyurl.com/The-Corvair-Patio http://tinyurl.com/Matts-Tech-Pages