From the best car enthusiast radio talk show ever: Car Talk!
This was originally written for Fords, which these two have an aversion to. However, you can fill in the blank for whatever old car you are laying under at the moment:
The _____ is my auto, I shall not want another
It maketh me to lie down beneath it
It soureth my soul
It leadeth me into the path of ridicule for its namesake
Yea, though I ride thru the valley, I am toweth up the hill
Thy rods and thy engine discomfort me
I anoint my tires with patches
My radiator runneth over
I repair blowouts in the presence of my enemies
Surely if this thing followeth me all the days of my life, I shall dwell in the bughouse forever.