This is a nice report for a great engine. Used a Fram Ultra filter, an 8 month interval with 60% highway, 40%city and short trips. For all the too thin naysayers and 5k with synthetic oil changers, this report hopefully will open some eyes. Toyota factory recommended oil change interval of 10k, 1 year seems to work great for my application. Not trying to start a war here but maybe with some more results like these, the 10k interval will become more accepted. Thanks