If you want a focused, single-bottle solution designed to clean carbon deposits from your catalytic converter and exhaust system for daily commute efficiency, choose Generic Three-Way Catalyst Cleaner; if you need a comprehensive fuel system treatment kit that includes three bottles of professional-grade cleaner plus a shop towel to tackle injectors, carburetors, and intake valves simultaneously, choose SMA ProQor Berryman 0116.
• Generic Three-Way Catalyst Cleaner: Its biggest strength is its targeted design to restore purification ability and reduce exhaust emissions in diesel and gasoline vehicles by cleaning the catalytic converter specifically. The trade-off is that it requires a strict six-bottle cycle over multiple fill-ups to achieve the promised results, rather than offering an immediate fix in a single tank. This pick is for the driver who wants to optimize engine performance and reduce fuel consumption through a dedicated, long-term cleaning regimen.
• The trade-off is the sheer size and weight of the package compared to a single small bottle, which might be more storage-heavy for those only needing a quick additive. This pick is for the car owner looking for a complete tune-up solution that handles gum, varnish, and carbon buildup across all critical fuel components.
The Generic Three-Way Catalyst Cleaner is built for a very specific purpose: restoring the health of your emission control system and improving combustion efficiency. If your vehicle has been running for a while without deep cleaning, you may notice reduced acceleration or slightly higher fuel usage. This product aims to reverse that by progressively improving power output and optimizing combustion conditions. It is not just a surface wash; it is designed to ensure the vehicle reduces its exhaust emissions effectively.
However, the user experience with this product is defined by its "planned cleaning" protocol. You cannot simply pour one bottle into a half-empty tank and expect a miracle. The instructions specify that one bottle must be mixed with 40L to 60L of oil, and you are advised to use six bottles continuously in each cycle for better results. This means you need to plan ahead. You will likely need to buy this product in bulk or remember to purchase another bottle at every fuel stop for several weeks to complete the full treatment cycle. It is a commitment to a process rather than a one-and-done fix.
This product is ideal for drivers who prioritize long-term engine health and emission reduction above all else. It fits perfectly for someone who drives a daily commute in a vehicle that needs help clearing out stubborn carbon buildup affecting their catalytic converter. If you own a diesel or gasoline vehicle and want to lower your driving costs by enhancing overall engine performance, this is a strong contender. Conversely, if you prefer a quick, single-tank treatment that cleans everything from the tank to the piston immediately, you should skip this one. It is too methodical for those who want instant gratification, but perfect for those willing to follow a routine for lasting benefits.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-11-06 · 6 min read · Independent comparison
The SMA ProQor Berryman 0116 kit takes a different approach by focusing on the entire fuel delivery chain rather than just the exhaust end. Unlike the targeted catalyst cleaner, this solution circulates through the fuel tank, fuel lines, carburetors, and fuel injectors as the engine runs. It helps clean critical components like intake valves, combustion chambers, rings, and pistons without requiring any disassembly. If your car is suffering from rough idling, poor throttle response, or inefficient fuel atomization, this kit is designed to address those issues directly at the source.
What sets this kit apart in a practical sense is the inclusion of the SMA ProQor branded shop towel. This isn't just a chemical additive; it is a ready-to-use maintenance kit. When you are performing fuel system maintenance, having a towel nearby to wipe spills or clean parts keeps your workspace tidy. The bundle offers significant value in terms of quantity, giving you three treatments instead of one. This allows for regular maintenance schedules without needing to repurchase the product constantly. The formula is also noted as being safe for catalytic converters and oxygen sensors, meaning you can use it regularly to extend the life of spark plugs and fuel injectors while helping reduce operating costs.
This product is best suited for owners of gasoline vehicles who want a broad-spectrum cleaning solution. It is perfect for the DIY enthusiast who likes to keep their workspace organized and prefers having enough supply to handle multiple maintenance cycles at once. If you drive a car with carburetors or older fuel injection systems that are prone to gum and varnish buildup, this is a superior choice. However, if you have a modern vehicle where the primary concern is strictly the catalytic converter's efficiency and you don't need to clean the entire fuel train, the extra volume and the included towel might feel like unnecessary bulk. It is a robust tool for general engine care, whereas the other option is a specialist for emission systems.
• Best for targeted catalytic converter cleaning → Generic Three-Way Catalyst Cleaner focuses specifically on the exhaust system and emission reduction.
• Best for comprehensive fuel system treatment → SMA ProQor Berryman 0116 cleans injectors, valves, rings, and pistons simultaneously.
• Best for users who need a multi-cycle supply → SMA ProQor Berryman 0116 provides three bottles in one package, reducing the frequency of reordering.
• Best for users who want a complete maintenance kit → SMA ProQor Berryman 0116 includes a shop towel for spills and part cleaning.
• Best for strict emission reduction protocols → Generic Three-Way Catalyst Cleaner is designed to optimize combustion and reduce exhaust emissions specifically.
• Best for ease of use with less planning → SMA ProQor Berryman 0116 treats the whole system with a standard pour-in method per bottle, whereas the Generic option requires a six-bottle cycle plan.
• Best for gasoline engines with carburetors → SMA ProQor Berryman 0116 explicitly lists carburetor cleaning as a key feature.
• Best for reducing fuel consumption via optimized combustion → Both claim this, but Generic Three-Way emphasizes the "planned cleaning" aspect to achieve this goal over time.
For my daily commute, I would personally choose the SMA ProQor Berryman 0116. While the Generic Three-Way Catalyst Cleaner has a compelling focus on emission reduction, the versatility of the Berryman kit wins out for me. Cleaning the entire fuel system—from the tank down to the pistons—feels like a more holistic approach to maintaining engine health. Plus, getting three bottles and a shop towel makes it a more practical investment for ongoing maintenance. The ability to treat gum, varnish, and carbon deposits everywhere in the fuel path ensures smoother idle and better throttle response, which directly improves the driving experience on a daily basis. In my opinion, the broader scope of the Berryman kit offers better value and peace of mind for a commuter vehicle.
The instructions state to add a bottle after filling up the oil, noting that one bottle can be mixed with 40L to 60L of oil to ensure full mixing.
Yes, the formula is described as catalytic converter and oxygen sensor-safe, helping to extend the life of these sensitive components.
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