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Penetrating Oil & Rust

Which Penetrating Oil is Best? Let's find out!

Apr 2018/11 min/5 products tested

Watch the test ↗

The verdict

  1. 1

    Liquid Wrench

    “the least expensive product at $4 a can, Liquid Wrench, beat all the competition”
    Buy on Amazon ↗
  2. 3

    Royal Purple

    “Then there's Royal Purple. It's $13 a can. It's a pretty good product, but that's a lot of money for a third place finish.”
    Buy on Amazon ↗

  3. WD-40

    “Then there's Water Displacement 40 or WD-40. Not really known as a penetrant, but it delivered a respectable fourth place.”
    Buy on Amazon ↗

Other picks

  • Also noted

    PB Blaster

    “Outcompeting both PB Blaster and of course Kroil.”
    Buy ↗
  • Also noted

    AeroKroil

    “I was I'm to see Kroil come out on top or at least second place because I did pay a lot of money for this product”
    Buy ↗
  • Best value

    Liquid Wrench

    “the least expensive product at $4 a can, Liquid Wrench, beat all the competition”
    Buy ↗

Everything tested 5

Links go to Todd's own Amazon listings with his affiliate tag intact — this site adds nothing and takes nothing.