Will this still work if added to existing oil or must it be added at the next oil change?

I have used this a number of times in older motorcycles, with great success. I have used it coincident to an oil change and also added it between changes. In both cases it has worked very well, indeed. I should not hesitate to add it without changing the oil, provided that there is room for it within the oil capacity of the machine.

Will this work on a main seal for a beetle with an air cooled engine which uses mineral oil and only holds 2.5 litres of oil.

Depends on how badly the seal is worn, if just allowing a small amount of oil to pass and small amount of smoke then could help, if seal is damaged and need replacing then it wont help..certainly worth a try if just smoking slightly...

Will this work to seal piston rings on a Zafira please

Sorry no.Only works on oil seals.

i think my turbo leaking oil on my tt will it work on it.

I am confident it might. . Sealed my oil leak

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Lucas Oil 10278 Engine Stop Leak, 946 ml

Lucas Oil 10278 Engine Stop Leak, 946 ml

Product ID: 48069330

Details

Brand
Lucas Oil
Liquid volume
1 Quarts
Package information
Bottle
UPC
049807102784
Vehicle service type
ATV Motorcycle

⏳Extends oil life by 50%+

🔇Reduces engine noise

🛡️Safe, non-damaging formula

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RM250

Duties & taxes included

In stock

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Description

🛠️ Seal the deal on leaks and drive worry-free!

VERSATILE PROTECTION - Works seamlessly with engines, automatic transmissions, hydrostats, and hydraulic systems.
LEAK PROOF CONFIDENCE - Stops stubborn oil leaks fast—even on older or high-mileage vehicles.
TRUSTED BY ENTHUSIASTS - Top-ranked additive with 4.3-star rating and thousands of satisfied users worldwide.
WHISPER QUIET PERFORMANCE - Experience a smoother, quieter engine with reduced noise and vibrations.
PROLONG YOUR ENGINES LIFESPAN - Boost oil longevity by over 50%, saving you time and money on frequent changes.

Lucas Oil 10278 Engine Stop Leak is a premium 946 ml additive designed to stop engine and transmission leaks by rejuvenating seals without harming engine components. It extends engine oil life by over 50%, reduces engine noise, and is compatible with a wide range of vehicles including ATVs and motorcycles. Highly rated and trusted, it offers a proven solution for maintaining engine integrity and performance.

Specifications

ASIN	B001KXN3YQ
Automotive Fit Type	Universal Fit
Best Sellers Rank	2,305 in Automotive ( See Top 100 in Automotive ) 11 in Engine Oil Additives
Brand Name	Lucas Oil
Compatible with Vehicle Type	ATV, Motorcycle
Container Type	Bottle
Country Of Origin	USA
Customer Reviews	4.3 4.3 out of 5 stars (5,941)
Global Trade Identification Number	05014002120302
Included Components	1 x Lucas Oil Engine Stop Leak - 946 ml
Item Type Name	Engine Stop Leak - 946ml
Item Weight	0.92 Kilograms
Liquid Volume	1 Quarts
Manufacturer	Lucas Oil Products Inc
Manufacturer Part Number	10278
Manufacturer Warranty Description	No Warranty
Model Number	10278
Size	946 ml
UPC	049807102784
Unit Count	946.0 millilitre
Viscosity	5w-30 sae_grade

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