Here's How Rust Penetrating Oils Actually Work

Ever wonder if the penetrating oil you're using to get that rusty bolt free is actually working? Here's a demonstration.

Project Farm

We've all been there: You're trying to wrestle a rusted bolt or nut off your car, but you just can't seem to break it loose. You buy a penetrating lubricant from your local parts store and spray it on in the hopes that it'll remove at least some of the rust and free the locked piece. Sometimes it works, other times, it doesn't.

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There's no real way to see just how deeply that lubricant is penetrating, so put together a comprehensive video comparing a bunch of the most popular kinds of lubricants in the hopes it can show us which one works best.

Project Farm tested each oil with four bolts. The control bolts used no fluid. Here are the results. 
YouTubeProject Farm

Using a collection of nuts rusted onto fixed bolts, the host applies one type of product to four bolts each, then measures just how much force it takes to break the nuts lose from their respective bolts. Additionally, he uses rusted bolts inserted into plexi-glass to demonstrate the penetrating abilities of each oil.

The experiment, despite being pretty technical, is incredibly interesting to watch. And now you know which kinds of penetrating oils work the best. .

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