Gunk Synthetic Motor Flush is recommended for diesel and turbo charged engines. It removes accumulated gums, varnish and sludge from internal engine parts. Allows oil to circulate freely to all parts of the motor.
- Recommended for use in all gasoline and diesel engines, including all turbo-charged engines
- Safe for use in engines that use conventional or synthetic motor oil
- Removes accumulated gum, varnish and sludge from internal engine parts
- Releases sticky valves and piston rings
- Allows oil to circulate freely to all parts of the motor














anthony dibiase –
2003 Saab Turbo. With 135,000 miles on it, my car was leaking tons of oil. The dealership diagnosed it had sticky piston rings, which caused high internal pressure from blow-by, causing oil to spew out of every seal there was. They proposed a total rebuild for an estimated $2,000 or suggested getting a used motor. Instead, I added Marvel Mystery Oil to my motor and drove for a week-about 300 miles. Then I flushed the motor with this GUNK Synthetic Flush, and then filled the motor with Mobil1 full synthetic oil. I honestly thought I might have caused greater damage to the motor because it instantly had a horrible smell of burning oil every time I drove. Then after another week or so, the smell went away, full power returned, and no more leaks! I couldn’t believe it. Full power restored using only chemicals. Who knew?
Emmanuel Offor –
Used to use regular gunk motor flush for my twin turbo 335I, but not that it’s really high mileage, I’d like to stick to what I should be using. discovered this product, but you can’t find it anywhere except amazon, who is hoarding it, and charging you left nut for them. Oh well, the life and times, right?
william j griep –
It didn’t work at all. Motor is still noisy. Going to have to tear engine down to fix it. This product probably works on less problematic vehicles. I would still try it on another car.
Daniel Rader –
Good stuff, just know that if you’re car has 75,000 miles or more on it that they suggest you remove your oil pan and clean the gunk off afterwards (but i did not and was fine at 90,000 in a 2001 nissan pickup)
Lance Boyer –
This works great on high mileage motors. Cleans them up and silences clattering motors.
Leebzeezy –
Follow instructions as to how and when to apply product concerning oil levels. Engine runs better and quiter
Steve smalley –
Works as advertised if you know what you need and how to do it.
ahmed –
i recommendedits clean my engine and remove all sediment I used it with new oilAfter 5 mint runin engineI drain oilIts come balck like old