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 engine flush
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3 votes
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1 review
Description
GUNK
USA
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What we know about GUNK engine flush
The brand is registered in USA.
In March 2026, PartReview does not yet have a formed opinion of GUNK engine flush. You can help by adding a review for GUNK engine flush.
Currently there are 1 review and 3 votes. Average rating — 5 out of 5. Vote balance: 3 up, 0 down.
Users also evaluated the qualities of GUNK engine flush:
- Idle smoothness - engine can idle a bit more evenly after use - no rating yet
- Drain appearance - old oil drains darker and thinner as deposits are loosened - no rating yet
- Smoke change - temporary exhaust smoke may appear during or after treatment - no rating yet
Engine flush GUNK in car-specific ratings
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