Vent: People who think PB Blaster is the same as penetrating oil

I was helping a buddy swap his rusted exhaust manifold on his 1998 Ranger last weekend, and he kept spraying PB Blaster on the bolts like it was magic. Told him he needed a real penetrating oil, not a solvent, but he insisted it was the same stuff. After snapping one of the bolts off clean, we had to drill and tap it, which took us another 2 hours. Has anyone else run into this confusion, or am I the only one who keeps a can of Kroil in the garage for stubborn rust?

2 comments

2 Comments

brian_coleman11d ago

Bro did he actually think PB Blaster was gonna cut through years of rust on a Ranger manifold? Those bolts are always welded on there. Ive seen guys swear by that stuff but its really just for light surface rust, not the crusty stuff on a 90s Ford. Did you show him the difference in how Kroil actually creeps in versus PB just sitting on top?

jessica_dixon10d ago

Wait, is this just another case of people thinking a general purpose product is gonna do the SAME job as something made for a specific task? I see this ALL the time at my store, not just with penetrating oils but with everything from paint to caulk. Folks grab the cheapest or most familiar brand and assume it's magic for every situation. PB Blaster is fine for loosening a bolt that's only a little stuck, but that's it. It's basically a solvent with a bit of lube, not a true penetrating oil that actually soaks into the rust. The real trick is understanding that each job has its own tool, and grabbing the wrong one just makes extra work for yourself, like that 2 hour drill and tap job. Your buddy learned a HARD lesson, but at least it only cost him time, not a whole manifold.