Introducing the once-a-year oil change. New Mobil 1 Annual Protection ultimate full synthetic motor oils feature breakthrough lubricant technology that provides protection for one year between oil changes or 20,000 miles, whichever comes first – guaranteed.*

Walmart is selling this in 5 quart jug for about $50.00.

YMMV, but it would require a good engine, using a good filter, and on mostly longer city/hwy miles, without dusty roads.

Economically wise, I think it would be best to do multiple oil changes per year with more conventional oils. I have found conventional oils can preserve an engine, if oil changes are done regularly. Even with 150kmiles, I have not yet observed a difference in engine performance, on 2.8V6s.

I'm sure its a fine oil, but at $50.00, plus a good thanks