For the homemade concoction what would be a good ATF to use? I don't think they're all the same.
I've had good luck using Liquid wrench penetrating spray lubricant which has worked very good in various applications, including some EGR valve bolts which are purported to be difficult to remove. I did try acetone + Ford ATF on some exhaust manifold heat shield bolts but can't really say if it was any better or worse than LW.
Based on a recommendation from a very experienced engineer friend of mine I use Kano Kroil. Over the past couple decades I've used it on some extremely stubborn bolts & screws and it has always worked extremely well. I let them soak for 2 or 3 days and Kroil breaks the bond. Here's the flavor I use. Ed
Was glad to see Liq wrench do so well.......... always what my dad used and me as well.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket....