Is this a fuel additive or is it the stuff you add to oil before you drain it?

Yes pour this into your oil when its warm, it's NOT A ADDITIVE for fuel.You need to mix this with your old oil, but don't drive! it's only for changing the oil.This is used to remove more sludge etc and keep your engine more cleaner.Make sure you Use for around 12-15minutes on high rev then, you MUST drain your old oil & change filter & fill up with new clean oil.I use this on every oil & filter change rarther than just draining the oil.(Works Well)Hope this was use full - any further help just ask

Hi. Does anyone know if I could use this to flush a brushcutter engine. 35cc. Thanks

Hi there, it will only work with in the oil if the motor is two stroke this wont work. Many thanks Dave

Is this safe to use in my scooter?

Don't see way not I use to use no my z 1000

Hi, could I use this on my 600cc motorbike, if so how much of it would I have to use? Cheers

Use it all, but check the instructions before you do!! Run the bike till the engine is nice and warm and the flush has had chance to work, then drain, change the oil and filter and your done. Sometimes you can put the flush in and run for a week of normal use, but personally I haven’t been brave enough to do this! Good luck.

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GST62450EN06 Engine Flush for Petrol & Diesel Engines 450 ml

Product ID: 48768196

Details

Automotive Fit Type
Universal Fit
Brand
STP
Liquid volume
450
Package information
Bottle
Vehicle service type
ATV Car Truck

⚙️cleans petrol & diesel engines

🛢️450 ml pro-grade flush

🇬🇧UK-made trusted formula

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€ 16.12

Duties & taxes included

In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Flush out the old, fuel your engine’s future!

ACID NEUTRALIZER - Safeguards engine parts by neutralizing damaging acids during flush
DEEP ENGINE DETOX - Powerfully removes sludge & harmful deposits for peak performance
LEAK DEFENSE BOOST - Stops and prevents minor oil leaks to protect your engine’s integrity
PRO GRADE TRUSTED - Scientifically formulated, UK-made, and trusted by professionals for 60+ years
DUAL FUEL COMPATIBILITY - Optimized for both petrol and diesel engines—versatility that fits your ride

STP GST62450EN06 Engine Flush is a professional-strength, 450 ml treatment designed for petrol and diesel engines. Proudly made in the UK, it removes harmful sludge and deposits, neutralizes engine acids, and prevents minor oil leaks, ensuring cleaner, more efficient engine performance. Ideal for use at every oil change, it’s trusted worldwide for maintaining engine health and longevity.

Specifications

ASIN	B0095KKXB2
Automotive Fit Type	Universal Fit
Best Sellers Rank	1,041 in Automotive ( See Top 100 in Automotive ) 10 in Engine Oil Additives
Brand Name	STP
Compatible with Vehicle Type	ATV, Car, Motorcycle, Truck, UTV
Container Type	Bottle
Country Of Origin	United Kingdom
Customer Reviews	4.6 4.6 out of 5 stars (2,021)
Global Trade Identification Number	05018704354119
Included Components	Engine Flush
Item Type Name	Engine Flush
Item Weight	428 Grams
Liquid Volume	450 Millilitres
Manufacturer	Armor All
Manufacturer Part Number	GST62450EN06
Model Number	GST62450EN06
Packer Contact Information	Creative International
Size	450 ML
Unit Count	1 1

Reviews

B**L

Happy with the result.

This made the goopy stuff come out of my engine after being sat still for extended period. I was warned that using this type of product doesn't come without risk. The goopy stuff may be what's holding the engine together. In the end, I had no problems after using but have heard stories about leaks caused afterwards.

12.04.2026

A**R

Brilliant

Outstanding. Used on Lawnmower with at least 1cm of sludge in bottom. Used 100ml and cleared after 15 minutes run time.

25.04.2026

A**R

Great product

Good

19.09.2025

C**N

Good price

Does the job perfectly for an oil change. Good value.

15.07.2025

W**E

Great

Great product, very happy 😃 Quality is very good also

25.04.2026

I**E

It does what it says on the tin.

It exactly what it was intended to used for.

14.04.2026

S**N

It works

Does what it says on the label. Highly recommend

3.04.2026

M**Y

I would not recommend using this on a car any older than 4 ...

Is very effective, maybe a little too effective it wore away at seals causing oil leaks. I would not recommend using this on a car any older than 4 years.

15.10.2015

G**E

Delivered just in time. Used in 2013 Yamaha fazer 150 (not well maintained.) with shell advance ax7..the bike feels really very much smoother than ever before.. Drastic pickup difference... Felt smoothness and much responsive just after using this product and changing engine oil.... Highly recommended for unmaintaied bikes. it is works for my bike.. Haven't checked millage.. At present my bike gives 35kmpl...I'm not sure whether it helps in increasing milage.. Since it removes some of the resistance it seems to increase milage.. But haven't tested it.. I'll update milage in few days...

20.01.2018

ا**ي

تم تجربته يغسل المكينه من الداخل

18.12.2025

Ç**N

Herkese tavsiye ederim

23.04.2024

S**Y

Very effective, cleaned the entire engine from carbon

18.06.2025

A**L

ممتاز و بينضف الماتور فعلاً

10.08.2023

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TrustScore 4.5 | 7,300+ reviews

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