Even though my shock isn't getting any less each time I see it, I've found my in-laws' 3.8-powered Grand Caravan nearly off the stick on oil twice since I started doing their oil changes and I can't tell that it's done any damage. It's got 201K on it and I don't even want to know what it's longest OCI has been, but since I've been able to change the oil pretty regularly (usually 8-10,000 miles) the last 3 or 4 times with Maxlife 5w20 it's using a quart every 1,500-1,800 mi. I told them it used some but still kept finding it low so I finally tried a little harder to impress upon my MIL to check it monthly and it may have done some good. I've also found my BIL's '98 LeSabre low on oil more than once, and I know for a fact that he never pops the hood. But really, just taking 2 minutes to glance at stuff under the hood once a month will pay off some day when you catch a problem before it lets go completely.