I have great intentions but little time, so I use Jiffy Lube. Problem is, my Son lost the Motor in his Jimmy when they put just 2 quarts in and the Crankshaft broke in three pieces. And, of course, the Engine blew 2 Miles from the Eisenhour Tunnel on Loveland Pass in the Colorado Mountains-

I have a '95 F-150 I bought new, it has little miles and just sits in the Garage now-anyway, my Wife took it in and had the Oil changed-she used it to move some stuff while I was away, and when I got back said it had a ticking sound-I checked the Oil and it didn't register on the Dipstick, so I put in 3 Quarts (it holds 6 Quarts-351). Luckily, I use Mobil 1 in everything, and I change it every 3,000 Miles (I know, anal)-hopefully it didn't hurt much-probably lost 10K+ in mileage before a rebuild however-

Now, if my Wife has the Oil changed in anything she stands at the Window like a Hawk and watches them put it in-since they use Mobil 1 they have to pour it out of the Quart bottles, so she counts-