STP Engine Stop Leak Oil Additive - 300ml (63300EN)

4.44.4 out of 5 stars

35 product ratings

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33 reviews

by 8261gerry22 Dec, 2021

great product

easy to use.. leak has almost stopped

Verified purchase: Yes • Condition: new • Sold by: millparts

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by antonio1359223 Oct, 2016

leaks or no leaks

i think many use this for external leaks however this puts somethings right internally almost straight away.
I experienced a quieter smoother engine and I don't think that can be a bad thing. ive already covered 500 miles since ive put it in. I think most vehicles up to 2000cc would benefit that are 5 years or older or 50000miles and over.
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Verified purchase: Yes • Condition: new • Sold by: caidistribution

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by rogerc927227 May, 2020

How big of a leak?

There comes a point when the product is a waste of money. I have reached that point, the oil leak was not to bad a little messy under the engine but no overly so.
Result was it didn’t work.

Verified purchase: Yes • Condition: new • Sold by: shopdirect365

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by sandra19631021 Aug, 2020

Good product

Significantly slowed down an oil leak which would have cost a lot of money to repair.

Verified purchase: Yes • Condition: new • Sold by: tek.automotive

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by 247_diy21 Nov, 2018

Does what its made to do

Very easy product to use and it stopped my oil leak

Verified purchase: Yes • Condition: new • Sold by: autoshopburyuk

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by roseparkers13 Jun, 2018

Does not do what it says it can do.

Followed the recommendations of adding the STP Leak stopper exactly. Leak was a very small drip at the start and the situation is exactly the same after three days.
What is recommended? Buy more and more Leak Stopper.??? Bit of a con says I.Read full review

Verified purchase: Yes • Condition: new • Sold by: partsdaddyuk

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by texaspete7419 Feb, 2020