In more than 70 years, John Frantz's so-simple-it’s-brilliant idea still has facinates mechanics and wrench-turners — why not use a roll of toilet paper as an oil filter?

In 1953 from his Ohio factory, Frantz started making his revolutionary oil filter bypass device that runs the oil in cars, trucks and farm equipment through a roll of toilet paper.

The paper at the time was thicker than any standard oil filter and extremely cheap. Also, it works so well that instead of changing the oil in a car using it every 3,000 miles, you only had to swap in a new roll of TP.

The Frantz company still makes its bypass system, having improved it over the years and expanding, like for modern diesel engines.

And the company still says toilet paper filters many times better and finer than the average m

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