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Review summary

Created with AI, based on recent reviews

Looking at 246 reviews, most reviewers were somewhat happy with their experience overall. Customers generally found the ordering process straightforward, though some encountered issues with additional items being added to their purchase without clear consent. Many expressed concerns about the product's effectiveness and the perceived inflated pricing compared to its actual value. However, some people were dissatisfied with the refund process, reporting difficulties in returning unwanted products or receiving their money back. There were also mentions of slow response times from the company when customers tried to resolve order or product-related issues.

What people talk about most

Product

Consumers find product to be ambiguous, with many expressing dissatisfaction due to issues like being charged... See more

Order

Clients share ambiguous opinions on order. Many reviewers report issues with unwanted items being added to... See more

Price

Reviewers mention negative feedback about price. Many customers feel ripped off, reporting unexpected... See more

Refund

People report negative experiences with refunds. Many consumers struggle to obtain full refunds, with some... See more

Response time

Reviewers highlight ambiguous aspects of response time. Some customers praise the very quick responses to... See more

Reviews shaping this summary

Rated 4 out of 5 stars

The support team was quick to respond and search a satisfying solution. I finally got a full refund for my order. However, all this experience would have been even better if from the beginning I wou... See more

Rated 4 out of 5 stars

I'm pleased with your response that you will honour your pledge to customers if they are not satisfied with the product thanking you once again for your help and kindness regards Peter. Please send... See more

Rated 4 out of 5 stars

Specific items were well explained. Items ordered with clear prices indicated. The "Original Prices" seem somewhat inflated at $895.06 for this order! But the "Total Savings" column brings the order... See more

Rated 4 out of 5 stars

The ordering of the item was first class The only problem was the delivery of the item it said in 5 to 9 days delivery at the moment it's took about 11 days and it's still not delivered.


Company details

  1. Car Accessories Store

Written by the company

SynGas offers fuel-saving technology designed to help drivers reduce fuel consumption, lower CO₂ emissions, and improve overall vehicle performance. Compatible with most petrol and diesel vehicles manufactured after 1996, SynGas is positioned as a practical and cost-effective alternative to traditional ECU tuning. The SynGas fuel saver works by optimizing ECU performance based on driving habits, helping improve fuel efficiency while supporting smoother engine operation. The device is designed for quick plug-and-play installation without the need for tools or professional assistance, making it accessible for everyday drivers. SynGas focuses on helping drivers manage rising fuel costs through a low-cost fuel efficiency solution that can be used without permanent vehicle modifications. The device is designed to support modern driving needs while offering an easy-to-use option for drivers looking to improve mileage and reduce emissions.


Contact info

3.5

Average

TrustScore 3.5 out of 5

431 reviews

5-star
4-star
3-star
2-star
1-star

Replied to 84% of negative reviews

Typically replies within 1 month

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Rated 1 out of 5 stars

Avoid the adverts and UK website

Avoid the adverts and UK website
Website tells you that you are there millionth customer then offers you items at a discounted rate but there's no way to say no, then when you go to checkout the payment goes through and you end up with extra items and paying 3 times as much, after contacting customer service they told me that the order had already been processed, there advice was to try the unwanted items before I returned them, what an absolute joke, so my advice is don't go anywhere near this site unless you want to pay more than you bargained for, I only wanted to pay for the syngas fuel saver at £39 but ended up paying £130 for other items I did not want or need.
Good luck if you try these Muppets.

May 11, 2026
Unprompted review
SynGas logo

Reply from SynGas

Hi there,

Thank you for sharing your feedback with us. Providing a clear and transparent shopping experience is very important to our team, and we take situations involving unexpected items or charges seriously.

As we were unable to identify your order from the information provided here, we have sent a request for additional details so we can review your case further and assist you accordingly.

Kind regards,
Roy from SynGas

Rated 1 out of 5 stars

Definitely do not buy

Definitely do not buy, SCAM, was originally going to order 2 units, but at checkout page there was a better offer, then opened PayPal app only to find without my consent they took the money and a ongoing subscription... I immediately cancelled order though syngas website and stopped payment with PayPal, who informed me it was a automated payment process, PayPal had already paid them but told me to expect refund in 2 to 3 working days, then syngas said unfortunately order had been processed with there warehouse and it was to late but give there products a try, I explained I cancelled within 5 minutes of ordering, still waiting response back.
I also think Google should take responsibility because the advert came through on their website.

May 11, 2026
Unprompted review
SynGas logo

Reply from SynGas

UPDATE

Hi Nigel,

Thank you for sending over your order details.

We have been able to locate your order and have assigned a dedicated agent to review your case further.
__________________

Hello Nigel,

We appreciate you taking the time to share your experience with us. Our goal is always to ensure customers feel informed and confident throughout the purchasing process. We do not condone deceptive practices and take feedback like this very seriously.

For clarity, our checkout process is designed to streamline ordering, and the final amount is calculated automatically based on the quantity and options selected before payment is completed. As we were unable to locate your order based on the review alone, we have requested further information from you so we can review your case in detail.

Please rest assured that we will gladly investigate your case further and assist you accordingly.

Kind regards,
Roy from SynGas

Rated 4 out of 5 stars

Easy to handle

Easy to handle. The things I am not interested in are easy to wipe. Clear description of the product.

May 11, 2026
Unprompted review
Rated 4 out of 5 stars

I was excited when I read about these…

I was excited when I read about these special offers online for these fuel saving gadgets to try help reduce the price of high priced gasoline for our vehicles.
Then, when I checked my Mastercard statement on the 10th of April, I had 2 charges for different amounts for the one order. I sent ment a message off regarding the double charge, as of yet, there has been no actual mention of returning the extra charge that was put thru. I have received 3 offers of discounts , 25, 45 and 70 % off the "highest price" for me to keep all 6 pkgs.
Your customer service is very prompt, courteous and does mention the key points in all of the correspondence that I have sent.

April 7, 2026
Unprompted review
Rated 3 out of 5 stars

Comment

Comment - A modern vehicle received inputs from many sensors. If you understand what each does you will see that the dosing of fuel is already specific to the environment the vehicle is in. The 91 octane fuel stoichiometric ratio air/gasoline is 14.7:1. Fuel burns best close to this air/fuel mix. Get outside this and economy and performance suffers. Both overly rich (higher ratio) or lean (lower) creates problems. There is basic physic here of unit or power generated per unit of combustible material (fuel plus air). To alter the power derived by plugging "something" to communicate with the ECU is fantasy. Why do nearly all reviews not mention their before and after economy experience?

May 10, 2026
Unprompted review

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