SynGas is about as easy as a car gadget gets: find the OBD2 port under the dash, plug it in and drive. The brand says it tunes the engine computer to your driving over the first 150 miles or so. Give it a fair test by logging two or three tanks before and after, pair it with a few proven fuel-saving habits, and order from the official store, where the multi-packs and the 30-day guarantee apply.
- Best for
- Drivers of 1996-or-newer cars who want a no-tools, plug-in gadget aimed at fuel use, and families who'd like one for each car.
- Why we like it
- Installs in under a minute, needs no app or upkeep, unplugs without a trace according to the brand, and drops to $24.85 a device in the 4-pack with a 30-day money-back guarantee.
- Keep in mind
- The fuel-saving figures are the brand's own. Track your mileage before and after, and keep the box so a return stays simple.
- 30-day money-back guarantee (keep the device and box in original condition)
- Ships from the official store
Quick facts
| Product | SynGas OBD Fuel Saver |
|---|---|
| Sold by | Norvello Limited, Manchester, United Kingdom |
| Format | Plug-in device for a car's OBD2 port that, according to the brand, tunes the engine computer for fuel efficiency · One plug per vehicle; the store doesn't publish its size or weight |
| Price | From $24.85 per device |
| Guarantee | 30 days, original condition |
What is SynGas Fuel Saver, and who makes it?
SynGas is a small green plug for the OBD2 port, the diagnostic socket found under the dashboard of most cars built since 1996. According to the brand, once it's plugged in it works with the car's engine control unit (ECU), learns how you drive and tunes fuel delivery for better efficiency. The brand's headline claim is fuel savings of "up to 55%"; that's its own number, and what any driver sees will depend on the car and how it's driven.
The appeal is how little it asks of you. There's no app, no wiring and nothing to maintain: you plug it in, drive as usual and unplug it whenever you like. It's sold through its own online store, one device at a time or in packs of 2, 3 and 4 for households with more than one car.
It's sold by Norvello Limited (Manchester, United Kingdom). The terms linked from the checkout name this company as the operator of Shoperians, the store that takes SynGas orders. Customer care runs through a US phone number, +1 (256) 448-8596, and support@get-syngas.com. Returns go only to the address support sends with your return approval, never to the company's office.
Who SynGas suits, and who should skip it
A good fit for
- Commuters and high-mileage drivers who want a simple plug-in gadget aimed at fuel use
- Anyone who'd rather not pay a shop for tuning or change anything permanently on the car
- Households with two or more cars, since the price per device drops in the bigger packs
- Drivers of older gasoline cars with an OBD2 port, which the brand says covers models made since 1996
Skip it or ask a doctor first
- Cars built before 1996 or without an OBD2 port, since there's nowhere to plug it in
- Fully electric cars, which don't burn fuel
- Drivers of diesel or hybrid vehicles who haven't checked with support first. The store doesn't say how SynGas behaves with them.
Features and materials
| What it is | A small green and white plug for the OBD2 diagnostic port. The brand says it fine-tunes the car's engine control unit (ECU) for fuel efficiency based on how you drive. |
|---|---|
| Compatibility | Cars with an OBD2 connector, which the brand's FAQ dates to models made since 1996. The store doesn't publish a list of makes or say anything specific about diesel or hybrid vehicles, so ask support before ordering for one of those. |
| Installation | Plug it into the OBD2 port, turn the ignition on for 30 seconds, then start the engine, according to the brand's FAQ. No tools or wiring. |
| Calibration | The brand says the device adjusts to your driving habits over about 150 miles and suggests about a week of normal driving for the best results. |
| Removable | According to the brand, SynGas makes no permanent changes to the ECU. Unplug it and the car returns to its original settings. |
| Maintenance | None, according to the brand. No app, batteries or subscription. |
| Indicator | The brand's photos show the device glowing green when it's plugged in. |
| In the box | One SynGas device per unit ordered. The store doesn't list anything else in the box. |
What the brand says sets SynGas apart
The sales page compares SynGas with other fuel products. This is the brand's own list, without the other columns.
- Saves fuel. The brand's central claim: it says SynGas tunes the ECU so the engine uses less fuel on the same trips.
- Easy installation. Plugs into the OBD2 port in seconds, with no tools or mechanic.
- Maintenance-free. No app, batteries, refills or subscription.
- Small and portable. About the size of a matchbox in the brand's photos, and easy to move to another car.
- Wide compatibility. Cars made since 1996 with an OBD2 connector, according to the brand.
- Reversible. The brand says unplugging it restores the car's original settings.
Fuel savings are the brand's claim. It doesn't publish test results, so track your own mileage before and after.
Does SynGas Fuel Saver work?
Every modern car has an engine computer that decides how much fuel to inject, based on sensors for speed, load, temperature and throttle. The OBD2 port is the standard socket that lets tools talk to that computer. SynGas plugs into it and, according to the brand, uses the data it reads to optimize fuel consumption for the way you actually drive.
The brand describes a short learning phase: you plug it in, turn the ignition on for 30 seconds, start the engine and drive normally. SynGas says the device adapts over about 150 miles, and its FAQ suggests giving it about a week before judging. It also says the device makes no permanent changes, so unplugging it returns the car to its original settings.
SynGas doesn't publish test figures for specific cars, so the best measure is your own. Before you plug it in, note your miles per gallon over two or three full tanks: fill up, reset the trip meter, and divide miles driven by gallons added at the next fill. Then do the same with SynGas installed, on similar routes. That gives you a real before-and-after for your car inside the 30-day window.
Pair it with the habits the US Department of Energy lists on fueleconomy.gov. Smooth acceleration and braking matter most: aggressive driving can lower gas mileage by roughly 15% to 30% at highway speeds. Mileage usually drops quickly above 50 mph, an extra 100 pounds in the car can cost about 1%, and properly inflated tires improve mileage by 0.6% on average. Cruise control on the highway and less idling help too.
How much SynGas costs
Prices on the official store on November 13, 2026. The store shows the price of one device, so the total is that price times the devices in your pack.
| Pack | Per device | Total | Shipping |
|---|---|---|---|
| 1 device | $39.99 | $39.99 | At checkout |
| 2 devices | $34.99 | $69.98 | At checkout |
| 3 devicesBest seller | $27.65 | $82.95 | At checkout |
| 4 devices | $24.85 | $99.40 | At checkout |
Crossed-out price on the store: $79.98 per device.
How the refund really works
The sales page and checkout promise a 30-day money-back guarantee: if SynGas doesn't meet your expectations, you can send it back for a refund. The written returns policy adds the details. Contact support within 30 days of receiving your order with your name, email and order number. They review the request within about 3 business days and send a return form plus the return address. Damaged, faulty or wrong items are refunded or replaced. For a change of mind, the policy asks for gadgets to come back in original condition, in the original packaging, with no signs of use beyond normal inspection. You pay return shipping, the original shipping fee isn't refunded, and you should email the tracking number. Allow up to 7 days for inspection and 3 to 5 business days for the refund to reach your card. If you plan to test it in your car first, ask support in writing how they treat a device that has been plugged in.
Is SynGas Fuel Saver legit or a scam?
SynGas is a real product sold through its own online store. Orders go through Shoperians, a store run by Norvello Limited in the UK, with a US phone line, email support, tracked shipping and a written 30-day return policy. The store says orders are usually processed within 24 hours and reach US addresses in 2 to 12 business days.
We're not showing a star rating here; instead, a few habits make ordering smooth. The checkout opens with the 3-pack selected, so pick the quantity you want and read the order summary, where shipping is added, before you pay. After payment, the store shows a page with extra devices at a discount, and you can decline it.
Keep the box and the device in good condition during your first weeks. The written policy asks for returns in original condition, so if you want to test first, it's worth asking support by email how they handle a device that has been plugged in.
Where to buy the original SynGas Fuel Saver
Order from the official SynGas store. That's where the pack prices above, the US support line and the 30-day money-back guarantee apply.
Green OBD plugs with a similar look are sold under many names, so starting from the official store is the surest way to get SynGas itself and its support.
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SynGas Fuel Saver FAQ
How does SynGas work?
According to the brand, SynGas plugs into the car's OBD2 port, reads how you drive and tunes the engine control unit (ECU) for better fuel efficiency. The brand says it adapts over about 150 miles of normal driving.
How do I install the SynGas OBD fuel saver?
Find the OBD2 port, usually under the dashboard on the driver's side. Plug SynGas in, turn the ignition on for 30 seconds, then start the engine, as the brand's FAQ describes. No tools are needed.
Which cars is SynGas compatible with?
The brand says it works with a wide range of cars made since 1996 that have an OBD2 connector. The store doesn't publish a list of makes and doesn't mention diesel or hybrid models, so ask support before ordering for one of those.
How long does SynGas take to show results?
The brand says it starts working right away and recommends driving for about a week, or roughly 150 miles, so the device can adapt to your habits. Tracking your miles per gallon before and after is the clearest way to see what it does in your car.
Is SynGas safe for my engine?
The brand says yes: it states that SynGas causes no negative effects and makes no permanent changes to the vehicle's settings.
Can I remove SynGas?
Yes. According to the brand, unplugging it from the OBD2 port returns the car to its original settings. It's a good idea to unplug it before a dealer service or an emissions test so the port is free.
How many SynGas devices do I need?
One per vehicle, according to the brand. The 2, 3 and 4 packs are meant for households with several cars.
How much does SynGas cost?
On November 13, 2026 the official US store charged $39.99 for one device, $34.99 each for two ($69.98), $27.65 each for three ($82.95) and $24.85 each for four ($99.40). Shipping was $5.95, $6.90, $7.95 and $9.60 for those packs.
Is SynGas a subscription?
No. The checkout we saw sold one-time packs with no recurring billing. The store may offer an optional extended warranty at $5.99 per unit, and after payment a page offers extra devices at a discount; both can be declined.
Can I get a refund?
Yes, within 30 days of receiving your order. Contact support first for a return form and the return address. Damaged, faulty or wrong items are refunded or replaced. For a change of mind, the written policy asks for the device in original condition and packaging, and you pay return shipping.
How long does delivery take?
The store says orders are usually processed within 24 hours and reach US addresses in 2 to 12 business days. You get a tracking number by email once it ships.
How do I contact SynGas customer service?
Use the support page on the official SynGas website and have your order number ready. The company behind the store is Norvello Limited (Manchester, United Kingdom). For a refund, ask support for the return instructions before sending anything back.
Is there a SynGas discount code?
The official store puts its discount in the packs. On November 13, 2026, the 4-device pack cost $24.85 per device, 69% below the store's crossed-out price of $79.98. If you try a code from another site, make sure you're still on the brand's own checkout, because the store's 30-day return policy only covers orders placed there.
About the author
Ethan Reed
Home & Consumer Comparisons Editor, Healthy Solutions
Ethan Reed compares kitchen and healthy home products. He weighs published specifications, replacement costs, subscription terms, return policies and seller details, the practical side of buying.
How we reviewSources
- SynGas official sales page (US), checked November 13, 2026
- SynGas official order page with pack prices and shipping, checked November 13, 2026
- Store terms and conditions (Shoperians, Norvello Limited), checked November 13, 2026
- SynGas returns and refunds policy, checked November 13, 2026
- SynGas shipping and delivery policy, checked November 13, 2026
- SynGas contact page, checked November 13, 2026
- Driving More Efficiently (fueleconomy.gov, US Department of Energy), checked November 13, 2026
- Keeping Your Vehicle in Shape (fueleconomy.gov, US Department of Energy), checked November 13, 2026
This review is for general information and isn't medical advice. Talk to your doctor before starting any supplement. Read how we review and our editorial policy.
