I have been using either ½ or 1 qt of Gunk Engine flush for more than 25 years and had no problems with seals at all, so I have no reason to try another brand.
Pros: no problems with seals
Vehicle:
Volkswagen Golf
Reviews of GUNK parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
5.0
Manufacturer Ranking
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1
Spare Parts
1
Country
USA
Spare Parts
Owner reviews of GUNK products
The GUNK brand is registered in USA. Official website is not specified yet.
In March 2026, PartReview recorded 1 review across 1 part by GUNK. Average rating — 5.0 out of 5.
GUNK is not yet in the PartReview manufacturers ranking due to insufficient reviews.
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- Engine flush GUNK - 1 review. PR Score — not available yet, average rating — 5.
Most owner reviews about GUNK parts are collected on these pages.
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