Kroil brand penetrating oil is
better than PB Blaster brand?

Yep. Kroil EATS rust. About 30 years ago to try it I put several
REALLY rusty nails in about 1/2" of Kroil. In the morning the rust had
FALLEN off. At a large truck repair shop, where I sometimes find
myself, they call it "Thank you Jesus". Try it, you'll like it.

dennis
in nca