Forte Seal Conditioner & Oil Fortifier 3 Pack | Valve Stem

Forte Seal Conditioner & Oil Fortifier 3 Pack | Valve Stem Seal Additive Kit for Engines 2 Litres and Over | Helps Reduce Blue Smoke and Oil Burning

Forté Seal Conditioner & Oil Fortifier 3-pack

A staged engine-oil treatment for compatible petrol and diesel engines 2 litres and over. The pack contains one 400 ml Oil Fortifier, two 125 ml Seal Conditioner tubes and a usage guide. Results depend on the underlying cause.

Blue smoke from the exhaust?

When smoke appears can help narrow the likely cause. A brief puff on start-up, after idling or when accelerating after overrun may fit valve-stem oil-seal wear. Constant smoke under load, heavy oil loss or abnormal operation can point to another cause that needs diagnosis.

Engine oil stop leak — for the right cause

Oil Fortifier supports the oil film first. Seal Conditioner is then used to condition hardened or slightly shrunken compatible rubber seals. This may help with seal-related blue smoke, rising oil use or minor seepage, but it cannot repair torn seals, worn rings, failed gaskets or serious damage.

What is included and how to use it

Exact 3-pack contents

One 400 ml Oil Fortifier, two 125 ml Seal Conditioner tubes and a usage guide. The main treatment is added to the engine oil in the verified sequence.

Stage the treatment

Add Oil Fortifier, drive one day, add one Seal Conditioner, drive a few days, then add the second only if smoke persists. Do not add both tubes together at the first Seal Conditioner stage.

Compatible engine-oil use

For compatible petrol and diesel engines 2 litres and over. A car may have an automatic gearbox because this goes into engine oil. Never add Seal Conditioner to the automatic transmission or its fluid.

When an additive is not the answer

It cannot repair torn seals, failed gaskets, worn piston rings, turbo faults or serious damage. Warning lights, pressure warnings, persistent smoke or heavy oil loss require mechanical investigation.

Customer ReviewsPriceIncludedEngine fitSequenceLimits

	Add To Basket	Add To Basket	Add To Basket
4.1 out of 5 stars23	4.7 out of 5 stars24	4.3 out of 5 stars298
£50.69£50.69	£70.09£70.09	£16.99£16.99
Oil Fortifier + 1 Seal Conditioner + guide	Oil Fortifier + 2 Seal Conditioners + guide	1 Seal Conditioner
Under 2 litres	2 litres and over	Standalone compatible use
Fortifier; one day; single Seal Conditioner	Fortifier; one day; one Seal Conditioner; few days; second only if smoke persists	Does not inherit either bundle sequence
Product-specific exclusions; no repair of damage	Product-specific exclusions; no repair of damage	Not automatic-transmission fluid; no repair of damage

Before you buy — quick answers

What's included?	One 400 ml Oil Fortifier, two 125 ml Seal Conditioner tubes and a usage guide.
Which product first?	Add Oil Fortifier to the engine oil first and drive normally for one day before adding Seal Conditioner.
When is tube two used?	Drive normally for a few days after the first Seal Conditioner. Add the second only if smoke persists; do not add both together.
Gasoline/petrol or diesel?	Both, for compatible petrol and diesel engines 2 litres and over, subject to the stated exclusions.
Automatic gearbox car?	A compatible car may have an automatic gearbox because the treatment goes into engine oil. Never add Seal Conditioner to the transmission or its fluid.
Other Seal Conditioner uses?	Seal Conditioner may separately be used in compatible manual gearboxes using EP gear oil, differentials and transfer boxes. Oil Fortifier remains an engine-oil treatment.

Wet belt or wet clutch?	Do not use Seal Conditioner in wet-belt/TBIO engines. Do not use Oil Fortifier in wet-clutch vehicles or motorcycles.
Can it help blue smoke?	It may help when smoke timing fits hardened or slightly shrunken valve-stem oil seals. Constant smoke under load needs diagnosis.
What won't it repair?	Torn seals, worn piston rings, turbo-seal faults, failed gaskets or serious mechanical damage.
How quickly?	No fixed result time is promised. Follow the staged intervals, drive normally and monitor symptoms and oil use.
Guaranteed repair?	No. Results vary with the cause and condition; this is not a guaranteed mechanical repair.

• COMPLETE KIT FOR ENGINES 2.0 LITRES & OVER: 2 x Forte Seal Conditioner (125ml each) + 1 x Forte Oil Fortifier – the engine oil additive kit sized for larger petrol and diesel engines. For engines under 2 litres, choose the 2 pack instead.
• GIVE IT 2 TO 3 WEEKS – NOT AN INSTANT FIX: the two products work as a team – Forte Oil Fortifier safely thickens the oil to slow the leak, giving Forte Seal Conditioner the time it needs to condition the valve seals. Improvements are typically noticed within 2 to 3 weeks of normal driving, and full results can take up to 2 months.
• REDUCES OIL BURNING & OIL CONSUMPTION: an oil additive for burning oil – for blue smoke on start-up, after idling or when accelerating after sitting in traffic, and rising oil consumption caused by hardened valve stem seals on high-mileage engines.
• HELPS STOP MINOR OIL LEAKS AT THE SEALS: Forte Seal Conditioner is an engine oil stop leak treatment that softens and restores hardened valve stem oil seals – and also treats camshaft, crankshaft, manual gearbox and differential seals.
• HIGH MILEAGE ENGINE OIL TREATMENT: Forte Oil Fortifier is an oil thickener that reinforces the oil film like an oil stabiliser, so less oil slips past the expanded gaps caused by worn valve seals into the combustion chamber – slowing the oil leak, reducing burning oil and cutting the blue smoke from the exhaust.
• SIMPLE 2-STEP TREATMENT: add Oil Fortifier to the engine oil, drive for a day, then add Seal Conditioner. Check your smoke first: blue smoke on start-up or after idling = valve stem seals (this kit). Constant blue smoke = worn piston rings, which it will not fix, nor cracked seals. Also works in manual gearboxes and diffs – not in an automatic gearbox. Not for wet-belt (TBIO) engines; Oil Fortifier not for wet-clutch motorcycles.

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