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🛠️ Stop leaks before they start — keep your engine running like new!
Wynn's Engine Oil Stop Leak Additive is a 325ml high-performance formula designed to restore and protect engine seals by rehydrating rubber and neoprene components. It prevents and stops oil leaks without altering oil viscosity or requiring engine disassembly. Compatible with all engine types and oils, it safeguards engine efficiency, reduces oil consumption, and is safe for emission systems, making it an essential maintenance solution for professionals and enthusiasts alike.

















| Asin | B0031ROB36 |
| Best Sellers Rank | 489 in Automotive (See Top 100 in Automotive) 3 in Engine Oil Additives |
| Brand | Wynn's |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,364) 4.3 out of 5 stars |
| Date First Available | 23 Dec. 2009 |
| Guaranteed Software Updates Until | unknown |
| Item Model Number | 50664 |
| Item Weight | 325 g |
| Manufacturer | Wynn Oil UK |
| Manufacturer Part Number | 50664 |
| Model | 50664 |
| Product Dimensions | 5 x 5 x 11.99 cm; 325 g |
User
Great for coating your engine at cold start
Well this product is great, does what it says on the tin... Tbh the amount of people complaining about the inginium JLR engine, saying its noisy, there is always a posion to put into your engine to quite things down, at oil change.A grest product thank you.....
User
Does the job
Stop’s oil seals becoming hard and therefore prevents leaking
User
... drips more than the odd bit of oil just like all the Series Land Rovers do
I used this in the engine oil of my 1982 Series 3 Land Rover which drips more than the odd bit of oil just like all the Series Land Rovers do. It does appear to have made a difference but hasn't stopped the leaks completely. I didn't expect it to make much difference but I thought I'd try it out and was pleasantly surprised that there was a perceived improvement.Don't kid yourself that this will cure major oil leaks, as it won't, but it may revitalise old seals that have taken up a compression set.This product apparently works by swelling the oil seal and the engine has to be run for a couple of hundred miles for it to take effect.It won't fix split or damaged oil seals.Overall, well worth a try on minor oil leaks. Don't expect miracles on major leaks.
User
Good at the right time
Yeah done the job for about a week but I think the gasket on oil filter housing is to far gone left it for 2 years my mistake but if u catch it early it would be a good product
User
Partially successful
Used on my wife's car it did stop the leak for a 1000 miles or so but leak is now back albeit less than before. Mixed results for me but definitely worth a try.
User
Good product
Wynns are a good go to product,used them for years
User
It's a can of engine stop leak :-)
Good price.Poured into car and now have to drive 300km to see if it's worked.Will be back to update after 300km completed.
User
E
Excellent
User
Funziona
Per me ha funzionato. Niente più perdite d’olio
User
Bueno para pequeñas fugas de aceite.
Es un buen producto para evitar pequeñas fugas de Aceite,no hace milagros,las grandes fugas hay que cambiar la junta defectuosa.
User
No problem at all for Hyundai Grand Starex, an old car needs a good maintenance.
I bought this for Hyundai Grand Starex 11 seater model. The car is over a decade from its production, so I needed a good engine oil for good maintenance. Wynn's served me over 3 years without a single problem, so I strongly recommend this product.
User
試してみる価値あり
初めて入れた時はオイル漏れが止まりましたがオイル交換したらまた滲み出て来たので再度購入まあ20年物の車なんで滲みが止まることを祈るばかりです
User
Effective
I applied to Peugeot 307 model 2007 and stops engines leak
Trustpilot
2 months ago
5 days ago