This test demonstrates that not all penetrating oils are equal. The see-through plastic/rusty bolt test shows which ones actually penetrate and which ones don’t.
So, which penetrating fluid is best? In this showdown, Project Farm tests:
- Brake Fluid,
 - Seafoam Deep Creep,
 - Fluid Film,
 - BG In-Force,
 - WD-40 Rust Specialist, and
 - CRC Knock’er Loose.
 
In the end, Deep Creep won the competition, with CRC Knock-er Loose coming in a close 2nd…

