I have a small 14 L motorcycle tank. How much of this 400 ml bottle should I put in?

Half should be sufficient for that tank.it wont hurt just increases strength of you use more.

Can this be used on modern car engines. my mb vito 2015, diesel states no addeditive should be added to the fuel. some say it may damage the cat?

If your user manual or manufacturer literature states that no additives should be used, then I would follow that directive. However, it is something that you might want to check with the manufacturer. If you use fuel from a recognised oil company, like shell or BP etc. you don’t need to use this cleaner as the additives are already in your fuel. If you use supermarket fuel like Asda or Sainsburys, then you would want to use an additive, but like I said, check with your manufacturer first.

I bought a set with diesel treatment. can i use them both at the same time?

I would use one at a time just follow the instructions.

How does the MPG gains maintain for the full 4000 miles before the recommended time to add a new bottle to it?

I renew after approx. 3500 miles and am satisfied with the MPG since I have been using the product. An approx. gain of 3/4 MPG.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Ultra 5 in 1 Petrol System Cleaner 400ml, Restores Power and Protects your Engine, Enhances Fuel Economy, Mechanical Car Cleaning Products, Concentrated Cleaning Formula, Made in the UK

Product ID: 57355323

Details

Brand
STP
Item form
Liquid
Item volume
400
Material Type Free
Alcohol Free
Material feature
Unscented
Scent
Citrus

⛽Boosts fuel economy & MPG

⚙️5-in-1 multi-action formula

🛡️Engine wear protection tech

¥6506

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

⛽ Power up your ride, save fuel, and protect your engine — all in one pour!

EFFORTLESS MAINTENANCE - Just one 400ml bottle per tank—simple, quick, and compatible with most petrol cars.
MAXIMIZE FUEL EFFICIENCY - Advanced cleaning tech optimizes combustion, stretching every drop of petrol further.
REVIVE PEAK ENGINE POWER - Concentrated formula clears carbon build-up for smoother acceleration and throttle response.
PROTECT PROLONG ENGINE LIFE - STP Wearguard reduces friction and conditions fuel system components for long-term durability.
TRUSTED UK QUALITY PERFORMANCE - Proudly made in the UK with a 4.6-star rating from over 2,000 drivers.

STP Ultra 5 in 1 Petrol System Cleaner is a concentrated fuel additive designed to clean injectors, intake valves, and the entire fuel system. It restores engine power, improves fuel economy, and protects engine components with advanced Wearguard technology. Easy to use and suitable for most petrol cars, this 400ml UK-made formula supports smoother driving and long-term engine health.

Specifications

ASIN	B00NC1GZ7G
Allergen Information	Allergen-Free
Best Sellers Rank	190 in Automotive ( See Top 100 in Automotive ) 9 in Fuel Systems
Brand Name	STP
Contains Liquid Contents?	Yes
Customer Reviews	4.6 4.6 out of 5 stars (2,125)
Global Trade Identification Number	05020144800125
Included Components	STP Ultra 5-in-1 Petrol System Cleaner 400ml
Item Form	Liquid
Item Type Name	STP Ultra 5-in-1 Petrol System Cleaner 400ml
Item Volume	400 Millilitres
Item Weight	400 Grams
Manufacturer	STP
Material Features	Unscented
Material Type Free	Alcohol Free
Model Number	GST76400EN
Number of Items	1
Part Number	GST76400EN
Scent	Citrus
Size	400 ml (Pack of 1)
Special Features	Concentrated
Special Ingredients	acids
Specific Uses For Product	Engine
Surface Recommendation	Metal
Unit Count	400.0 millilitre

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

¥6506

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews