Frozen bolts?

[AlThums]

In replacing the 5-speed on my '93 XLT 3.0, I had to remove the crossover on the exhaust. It was pretty rusty, and I was concerned with breaking the bolts. My father-in-law gave me some penetrating oil called Kroil that loosened them right up without heating. Shooters use it to clean the copper fouling out of their gun barrels. I hosed them down, let them sit overnight, and it worked like a charm.