My oil life went to 5% at 4,700 miles so I changed out my oil. I found the specified 4.5 quarts only brought me up to the middle of the dipstick. Being the anal guy that I am, pre-filling my oil filter and all, I wanted it at the top hash mark so I had to add almost another half a quart. Next time I'm just going to dump in 5 quarts and call it good knowing there's a little margin of error and I'm not going to foam my oil by adding 5 quarts. This makes it easy as I can buy the 5 quart Mobil 1 container at WalMart cheaper than any where else I've found. Still have to get the Mobil 1 filter at Autozone though, doh!