Do engine flushes work?

[toximus]

Blackstone did testing. Attached is their report.

 

[TheBoogieman]

I used one once. Did wonders for my dried out seals.

 

[Jerry Bransford]

Blackstone did testing. Attached is their report.

Color me slow today, their results confused me. I didn't know how to interpret the results to know if one of the three brands worked any better than the others.

 

[pagrey]

Seems like they couldn't see evidence any of them worked at all. They didn't test the filters to see if there was any trapped debris so they kinda have to say they couldn't tell for sure.

 

[Potomus Pete]

I pour a half gallon of paint thinner, and run it for a couple minutes. Then dump it. I don't do it often. Just when I first get an old vehicle for restore.

 

[Chris]

I use Listerine for my engine flushes. Your exhaust will smell like mint for months