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This is one of those goodies that I am really pleased with, seems also to have cleaned the turbo surfaces as well ... and I have not seen one of those annoying 'check engine' warnings [indicating oxygen sensor dirty usually but don't bet on it!] ever since I used it. Simple to use, one addition to a tank of fuel. Wynns generally make superb additives that are not harmful to the engine, and are very helpful as well.
Verified purchase: Yes | Condition: New
Bought a little used s/h car with a high tune engine and put some in along with Shell V-Power. Noticed a small improvement in zip after 500 miles.
Verified purchase: Yes | Condition: New
Helped clear my EGR valve great stuff and a trusted brand
Verified purchase: Yes | Condition: New
used it found it clean system and car runs 90% better
Verified purchase: Yes | Condition: New
Cleaned cards out spot on 😀
Verified purchase: Yes | Condition: New
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