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French fry smell from a diesel engine isn't always a good sign
I was at the shop yesterday and a customer's truck smelled like a fast food joint. Turns out he tried running it on used cooking oil without proper filtering, and now the injectors are completely clogged. Are more people trying this kind of thing, or is it just my area?
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emmalewis5h ago
My biofuel experiment turned my car into a mobile fryer.
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sandra_carter4h ago
That "mobile fryer" situation is exactly the problem. That smell means the oil is breaking down and leaving a gummy, sticky residue everywhere it touches. It coats the inside of the fuel lines and the injector nozzles, and when it gets hot in the engine, it basically turns into varnish. You might get away with it for a little while, but then the engine starts running rough because the fuel spray pattern gets all messed up. It's a total pain to clean out.
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