I use the real deal, a petroleum based solvent like we used in the old days. It'll eat your hands up but it's still the best solution (no pun intended).

I found a bulk oil distributor that sells it by the gallon right from a pump. Sweet.
wink

1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain