I must admit, after reading these forums for years I have gathered quite a collection of oils. Between my dodge truck, my girlfriend's kia, and the random lawn equipment I take care of I have developed quite a stash of oil bottles of this that and the other. Just curious what you guys keep on hand at all times? I pretty much always have 30w for the mowers and 10w-30 for the truck, I also keep a gallon of cheap transmission fluid for flushing out the crankcase of engines in friends vehicles that are often way over due for an oil change. What would you guys consider your typical inventory for around the house? How about in your vehicle tool box, do ya'll always carry extra for the "just in case" moments?