I second Californian (I think)

Biodiesel is a great parts cleaner. It's worth making a small 5 gallon bucket batch to do so. Checkout infopop.biodiesel.cc

Best part is the BD is a good parts cleaner and the glycerine byproduct is a good degreaser for everything else... like when I get grease on the car or, etc... But be careful because BD will strip some paint...

Bill

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'87 300SDL, intensely modified Greasecar setup, with nickle plated heat exchanger, 3 valve setup, 312,000 miles
'95 Suburban diesel, Greasecar basics, 16 plate heat exchanger, mercedes fuel lines, Racor filter
'85 Renault Alliance converted full electric vehicle