I have used the Super Tech 10-30 full synthetic engine oil since Walmart started selling it. I use it in all my gasoline-powered vehicles, especially my 1997 Geo Metro with the three-cylinder engine. I now have over 215,000 miles on this engine and have changed the oil & oil filter every 10,000 miles; yes, every TEN THOUSAND MILES!! You can't beat the oil as far as I'm concerned.
