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What Happens When You Add WD-40 to a Petrol Car's Tank?

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

In this video, an experiment is conducted to see if WD-40 can clean an injector that had a problem on a bi-fuel vehicle. The injector issue is not resolved, but the car runs better and its performance improves by spraying only 7-8 seconds of WD-40 into a 10-litre petrol tank.

Naturally, the YouTuber suggests trying this experiment on a car in good condition, as if it were any additive that keeps parts clean, rather than hoping it cleans them from dirt; in fact, it might be worse if it dislodges deposits that could clog the injectors.

Therefore, the additive is recommended; it's worth trying but only on a car in good condition, not to fix a problem.


Updated on 22 June 2026 by ScegliAuto


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by ScegliAuto

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