DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
⚙️ Keep your engine running cooler, quieter, and stronger — because classics deserve the best!
STP GST60300EN12 Oil Treatment is a 300ml mineral oil-based additive designed for petrol engines, enhancing motor oil with viscosity improvers and anti-wear, anti-friction, and anti-oxidation agents. Perfect for older or high-mileage engines, it extends oil life, improves lubrication, and protects critical engine parts under heat stress, ensuring smoother, quieter operation until the next oil change.
| ASIN | B0057VT5LC |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | 89,090 in Automotive ( See Top 100 in Automotive ) 120 in Vehicle Oil Additives |
| Brand | STP |
| Brand Name | STP |
| Compatible with Vehicle Type | Car |
| Container Type | Bottle |
| Customer Reviews | 4.6 out of 5 stars 138 Reviews |
| Global Trade Identification Number | 05018704350111 |
| Item Type Name | 33183 |
| Item Weight | 240 g |
| Liquid Volume | 300 Millilitres |
| Liquid volume | 300 Millilitres |
| Manufacturer | Armor All |
| Manufacturer Part Number | GST60300EN12 |
| Package information | Bottle |
| Unit Count | 300.0 millilitre(s) |
| Vehicle service type | Car |
| Viscosity | 5W-30 sae_grade |
H**?
Perfect for older simpler engines
I use this in a Ford Capri 2.0 to add a bit of extra zddp to the oil to protect the camshaft. Plus the engine has done 100k miles, so the extra viscosity keeps the oil pressure healthy. It may just be my imagination, but I'm sure the car runs quieter and cooler with this in. I add it to the 10w/40 semi-synthetic oil Ford originally recommended for Pinto engines, and it seems to alter the viscosity to approximately that of a 15w/50 or 20w/50, judging by the oil pressure gauge (and how it flows when I drain it). All in all brilliant for a classic engine, but probably not a good idea to put it in a post-millennial vehicle.
G**8
STP GST60300EN12 Oil treatment for petrol engines (300ml)
As servicing mileage is increasing anywhere between 10,000m ~ 20,000m to support your synthetic or mineral oil--I would recommend using STP after every service to improve it's viscosity !! The best way of using it is to boil a saucepan open the STP bottle & let it simmer for about 10 minutes so that the STP is liquid & easier to pour into the engine without wasting any STP is also excellent for older engines where parts are beginning to wear & need better lubrication particularly valve guides & big-end assembly
G**Y
Just the job!
Having bought my granddaughter a 10yo jalopy for her 18th birthday, I decided a tad of engine care wouldn't go amiss! I have used STP additives since I was a poor student myself (many moons ago) and have never regretted it. Prevention is always better than cure! This time the car seems to be happier and running smoothly. Let's hope it stays that way! Remember to closely follow the instructions on the container.
A**R
A good product
Rather smaller than what I expected
M**S
Not amazing but really good
It arrived quickly, heated it up in Bain Marie very hot water as some customers advised. After screw cap, plastic film lid came off fairly easily and it poured ok. Ihas indeed quietened the engine a little and the car appears to have a little more Umph!! however, it has done nothing to the MPG (not that I was expecting that but would have been a decent bonus) ...now I just drive around knowing that I did the best I can do to protect the engine. I am happy.
L**B
Stp.
Added to 10-40 oil + renewed oil filter haven't been out on bike since I done oil change so can't comment. My friend is a mechanic and he highly recommends all stp products.
D**T
Three Stars
Didn't really help
B**N
Always a great oil treatment
Always a great oil treatment
Trustpilot
2 months ago
3 weeks ago