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⛽ Unlock your diesel’s hidden power—clean, smooth, unstoppable!
STP Diesel Complete Fuel System Cleaner (400 ml) is a concentrated additive designed to clean the entire diesel fuel system in one tank. It removes carbon deposits from injectors, valves, and combustion chambers, preventing engine hesitation, power loss, and corrosion. Trusted for over 60 years, this formula helps maintain optimal engine performance, reduces filter blockages, and improves fuel efficiency—ideal for professional-grade engine care and long-term reliability.
| ASIN | B00A0JJI4K |
| Best Sellers Rank | 50,069 in Automotive ( See Top 100 in Automotive ) 272 in Fuel Systems |
| Brand | STP |
| Brand Name | STP |
| Contains Liquid Contents? | Yes |
| Customer Reviews | 4.5 out of 5 stars 154 Reviews |
| Global Trade Identification Number | 05020144800873 |
| Included Components | 1 bottle |
| Item Form | Liquid |
| Item Type Name | Car System Cleaner |
| Item Volume | 400 Millilitres |
| Item Weight | 380 Grams |
| Item form | Liquid |
| Item volume | 400 Millilitres |
| Manufacturer | Armored Auto Group Sales Inc. |
| Material Features | concentrated cleaning power |
| Material Type Free | No_Material_Type_Free |
| Material feature | concentrated cleaning power |
| Model Number | GST65400EN |
| Number of Items | 1 |
| Part Number | GST65400EN |
| Scent | Unscented |
| Size | 400 ml (Pack of 1) |
| Special Features | diesel fuel system cleaner |
| Specific Uses For Product | Engine |
| Specific uses for product | Engine |
| Surface Recommendation | Metal |
| Unit Count | 400.0 millilitre |
S**A
Perfect. Stopped my car from shaking at start-up
My BMW (12 years old with 113k milage) started to shake when I’d start it up. It used to feel like it was going to take off but the shaking would only last for about 15 seconds or so. I thought it’d be an expensive fix but came across this and thought I’d give it a try. Filled up a full tank of Diesel and then poured the entire contents of this bottle in immediately after. I didn’t notice much difference whilst driving like some people say (I didn’t have any performance issues anyway). However, the shaking at start-up has finally stopped! It’s recommended to use this product every 4000 miles so I’ll definitely be doing that as it has certainly helped with the shaking issue. I’d recommend this.
K**.
Fuel system
All good
I**N
I might buy it again
I normally use another product which is readily available at supermarket garages, but I thought I'd give this a go. Much more expensive but apparently it is meant to last much longer rather than using half a bottle of that other stuff each time I fill up. Overall I do think it did a good job but I don't think I would buy it again in a hurry.
D**S
Cleaned
Cleaned fuel system
K**E
Good Product
bought this off UK SELECT DEALS, really good product does what it says for a good price, car feels smoother, fuel is lasting longer happy as larry
A**R
Quality Product to help with good fuel delivery to your Diesel Engine
STP is a quality Company and have used the DPF cleaner as well to help with the emissions from my Mark VI TDi Golf. Used this product after having a EGR Fault and decided to put into my last full tank of fuel and got a good 55.8MPG over mainly urban and a bit of Motorway driving covering 580miles before filling up.
I**H
Good
Good. It works for its purpose.
L**T
Not for my car
As bought for a different fuel engine system
Trustpilot
1 month ago
3 weeks ago