I use Mobile One 0w-20 in my Insight, and change it every 10,000 miles. 5 quarts runs about $25, and I can get ~2 oil changes out of a 5 quart jug. An oil filter runs ~$4. At 30,000 miles per year, I'm spending about $50 on maintenance.
My car came with service records going back to day one, and apparently other than having the hybrid battery replaced under warranty in 2010 (southern car) and tires, the only things that have ever been done to it (other than replace an axle, control arm and wheel my wife damaged in an accident) are that I replaced the clutch master, at about $60 from RockAuto, tires, and a $90 rear engine mount. I bought new brake pads because they were on sale for ~$5 each but the factory brakes still had tread left at 200,000 miles.
I think $150 in parts and $350 in oil over 210,000 miles seems pretty reasonable to me.
