advice on generic parts cleaner?

["Vink, Graham" <vinkg@fleishman.com>]

I have one of those small recirculating parts washers and am wondering what
to use in it. Total capacity is probably two gallons.

In the past, I've used mineral spirits, which is not too toxic. I'm sure
methyl chloride is better, but it's nasty and also more expensive. Does
anybody have any other suggestions?

Thanks.

Graham