Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

**markpa** · 05-14-2017

Talking to a GM tech and he was saying how they would dump a quart in a tank of gas and it would clean the fuel system and valves better than any fuel injector cleaning .

Anyone ever tried this?

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**Fivefingerdeathpunch** · 05-14-2017

Done it before, it works.

On vehicles with filters, I'd maybe change it afterwards. Most newer vehicles just have socks on the pump now anyway.

**Mitch R** · 05-14-2017

Yup, it's all I've ever used. Seems to work well. I've never changed the filter after.

**buickman104** · 05-15-2017

Does it foul up the plugs? I wanna give this a shot!

**markpa** · 05-15-2017

Ok. I will it a shot.

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**Bronco Boy** · 05-15-2017

A small amount of water makes for a nice steam clean too.

**markpa** · 05-18-2017

Well I burned up the tank 400 miles and no issues. Seems a little more responsive but that could just be the mind at work. At least I didn't throw any codes or need a tow. Might try it on some of my other vehicles.

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