LIQUI MOLY Cera Tec 3721 I Ceramic Wear & Tear Protection for Petrol & Diesel Engines I Smoother Engine Performance, Less Friction & Lower Fuel Consumption I Ceramic Additive 300 ml Pack of 1

LIQUI MOLY Cera Tec 3721 is a popular ceramic-based engine oil additive designed to provide wear and tear protection for both petrol and diesel engines. Here’s an in-depth review based on personal use, expert opinions, and user feedback:Composition and PurposeCera Tec is formulated with ceramic compounds that are intended to reduce friction and wear inside the engine. The primary aim is to protect engine components, extend engine life, and improve overall engine performance.Key Claims and BenefitsWear Protection: Cera Tec is advertised to form a protective layer on metal surfaces within the engine, reducing metal-to-metal contact and, consequently, wear.Friction Reduction: By minimizing friction, Cera Tec aims to improve engine efficiency and potentially enhance fuel economy.Temperature Resistance: The ceramic particles in the additive are designed to withstand high temperatures, ensuring the protective layer remains effective even under extreme conditions.Noise Reduction: Users often report a reduction in engine noise, which can be a sign of reduced friction and smoother operation.Application and UseCera Tec is compatible with all commercially available oils and can be used in both petrol and diesel engines. It’s typically added during an oil change, and one bottle is sufficient for up to 5 liters of engine oil. The additive is mixed with the engine oil and does not require any special procedures.Performance and EffectivenessPersonal Use and User FeedbackWear and Tear: Many users report noticeable reductions in engine wear over extended periods. This is often observed in smoother engine performance and longevity.Fuel Economy: Some users have noticed slight improvements in fuel economy, though this benefit can vary based on driving conditions and engine type.Engine Noise: A significant number of users report quieter engine operation after using Cera Tec, suggesting effective friction reduction.Smooth Operation: Improved engine smoothness and responsiveness are commonly cited by users.Expert OpinionsAutomotive experts generally acknowledge that ceramic additives like Cera Tec can provide additional protection against wear, especially in high-stress or older engines. However, the benefits can sometimes be marginal if the engine is already in good condition and maintained with high-quality oil.Pros and ConsPros:Enhanced Protection: Effective in reducing wear and extending engine life.Versatility: Suitable for both petrol and diesel engines and compatible with all types of engine oils.Improved Performance: Potential for smoother engine operation and noise reduction.Temperature Resilience: Maintains effectiveness under high-temperature conditions.Cons:Cost: Relatively more expensive than standard oil additives.Variable Results: Benefits like improved fuel economy may not be significant for all users.Over-reliance: Should not be seen as a substitute for regular maintenance and high-quality engine oil.ConclusionLIQUI MOLY Cera Tec 3721 generally lives up to its claims, providing an extra layer of protection for engine components. It is particularly beneficial for high-mileage or older engines and in conditions where engines are subjected to high stress. While the cost is higher compared to standard additives, the potential benefits in terms of wear reduction and smoother operation can justify the investment. However, it’s important to have realistic expectations and not to rely solely on additives for engine maintenance. Regular oil changes with high-quality oil and proper engine care remain essential.

I flushed my VW Passat with Liqui Moly engine flush , then installed new filter and a cheap 5/30 . Then i drained it again and installed new filter and a quality LL 5/30 Oil. Brought up to temperature and added Ceratec , after about 5 miles i noticed the engine was quieter everything just seemed smoother from acceleration - to engine noise - definitely not a placebo. I'll update if there is any change after the 500 miles bed in . This stuff is awesome, highly recommend. 5 Stars all day long.

This LIQUI MOLY additive is used for both Petrol and Diesel engines, and each 300ml bottle can be used for up to 5-litre engines. From what the product mentions this will reduce friction wear, smoother engine performance, and reduce fuel consumption and pollutants.From my experience, I can at least mention a few benefits I've seen over the years since I first used it back in the beginning of 2022 and 2024. When I use it I can certainly notice a difference within a few starts that the engine feels smoother (similar to when you install a new set of spark plugs). I've had my car since 2016 with approx 90,000 miles done so far with no engine faults or problems to speak of (except spark plugs and a control pack, but internally nothing has gone wrong). I'm pretty sure the bottle or the website mentioned you only need to do it once every 2 years, but because I'm not 100% sure, I would recommend using this with every oil change.As for lowering fuel consumption, it's hard to say, I couldn't notice anything substantial so I wouldn't say this is a feature but more of a placebo from the smoother engine performance, but on other cars, you may see bigger benefits.Luckily this is super easy for anyone to install themselves if they're doing their own oil change. You can do this in one or three ways from what I've read/seen. Firstly you can add it at the beginning before adding your oil, at the end but just make sure you don't overfill your engine, but my preference is to use 2 litres of oil and then add the LIQUI MOLY additive, and finish off the rest with remaining oil to add. You can choose whatever way you like as this is just personal preference, but all 3 ways show you how easy it is to use.✪ Would Highly RecommendI hope you have found this review informative in helping you decide whether to buy this product. I also have more reviews on my profile if that interests you.