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

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.

TLDR: Makes all the numbers better.Because there is less energy being wasted due to friction. Gives engine oil a physical ceramic lubricant and a chemically bonded layer to all metal parts the oil touches, making the engine run with less wear and friction, saving a bit of fuel and repair bills.I have heard a LIQUI MOLY representative say that if you change your oil with Cera Tec then you can go 30,000 miles before the next oil change......................Maybe technically it is possible, but please no one do this. Change your oil every year or more if you do loads of miles.Update: I have put this in my new petrol hybrid.Small put noticeable mpg improvement.Noise reduction is more noticeable, especially at low and cruising RPMs.As the engine cuts in and out constantly due to hybrid system, the chemically bonded layer of lubrication definitely helps with the advanced stop start system. As there is always a layer of lubrication before the oil circulates.Peace of mind knowing that I have additional protection in winter and with short journeys.I had to buy something to suck out some of the oil before I added Cera Tec. The service was due in 4 months so I didn't want to bother changing it myself. Service has to be done by a dealer to maintain warranty, but you can change it yourself between that if you want. I don't put enough miles on it to justify a 6 month oil change.When they change the oil at the dealer I will lose the ceramic physical part, but the chemically bonded layer will still be there and lasts about 30,000 miles. I will put MoS2 in when they change the oil to bring back the physical part.I put this in my older diesel and a petrol car. I also did an engine flush in both. For best results do it with an oil change, do it yourself or get it done for you and then add it. My car needs 4.5l of oil Cera Tec takes up 0.3 so I put in 4.2l of oil and then Cera Tec. Pro tip, when you have poured in the bottle, put some oil the bottle and shake to get the most out of the bottle and in your engine.How it works: There are 2 parts to it. The first is the "physical" lubricant element which is ceramic based hence the name. LIQUI MOLY also sell M0s2 which is a physical particulate lubricant, but Cera Tec is more advanced and modern. Think of the physical element as another layer of lubricity that rides in the oil film so you have 2 layers of protection between the metal parts of your engine. Castrol use liquid titanium as their physical part in their oil to improve lubrication but the concentrations are not as high as a dedicated oil additive. This part works as soon as you put it in with the oil.The ceramic physical part also helps a lot with reducing the heat degradation of the oil. Ceramic has great thermal properties and this will keep the oil film at its best for longer.The second and more important, unique and noticeable part is the "chemical element." Cera Tec has a chemical that will bond to the metal components of the engine that the oil touches, leaving a bonded layer of lubrication that will last up to 30,000 miles. Meaning you have 3 layers of lubrication in the engine instead of just the oil film which degrades over time and usage.The chemical part takes about 500 miles of driving to work as it needs heat and pressure to form on the metal surfaces. You can probably speed this up with a few motorway trips at mid RPMs. Once it has, you will notice the difference!!!Here is what I have noticed:5mpg improvement. Most people find a 1-2% improvement in fuel economy which over 10,000 miles a year adds up!Cold starts sound a lot better.It helps reduce engine wear from short journeys.Power delivery is smoother and the car feels happier to rev.It has made my diesel so much quieter, I would even suggest buying this just to help with the "diesel tapping" sound.The engine just sounds better and is so much quieter at lower cruising revs.Engine start up is much smoother and quieter as there is a layer of lubrication at all times even before the oil starts to circulate. This may help prolong starter motors as well as it can crank the engine with less effort at cold start up.If you had a fast car that can take corners at speed your engine could experience temporary oil starvation which can cause a lot of damage, but with Cera Tec, you have that bonded layer of lubrication to save the engine in rare circumstances like this.When you change your oil next you will lose the physical ceramic lubricant, but the chemical layers lasts for 30,000 miles. So just buy LIQUI MOLY M0s2 for the 2 oil changes after Cera Tec to bring back the physical part.Remember don't buy Cera Tec for every oil change!!!! Or your wallet will hurt. Use Cera Tec once and then the next 2 oil changes should be done with M0s2 and then back to Cera Tec for the 4th. (If you change oil every 10,000 miles and or once a year)Change your oil just before winter and use Cera Tec, your engine will thank you. Remember it will take about 500 miles of driving to experience full benefits. Worth every penny.

Have used this in different cars. The engine seems to run smoother and quieter

I've done quite a bit of research before buying this, as I own a very high milleage car, 197k miles 2012 Jetta Mk6.For the time being 2 weeks in after putting it in with a new oil change here's the stuff I've noticed:On my usual drive to the shop which mind you is happening in Wales, so various speed limits, I had in the past 50-52 mpg, now with the Cera Tec, I got a 56-57 mpg, this is using basic diesel from tescos.The engine seems to now stay in lower gear more frequently than before all the while pulling just the same, my car is an automatic, thought I should mention.Engine feels a bit quieter, and also the usual click click click sound of the engine, when I turn the car off is quieter and sometimes doesn't happen at all. My car ain't faulty, it's a diesel, I was told it's a normal thing.For the time being it's still too early to give a more detailed opinion, but I will be coming back with an update in the following months.

Put this in, left it idle for 20 minutes and it made a noticeable difference to the ticking noise immediately. Being a small engine anyway I can now hardly tell it’s on and crunched the starter motor.Took it for a 400 mile round trip and noticed it seemed to dive smoother than before. Must do some good.Could be imaginary but it certainly didn’t do anything to kill the engine immediately.

Used it in EVERY car, a GAMECHANGER for engine quietness and long term performance and protection

Third purchase of this product and I highly recommend it as it saved my sons 320D chain rattle and has quietened the noise as well as runs better than before. German product that works easy to put in engine and comes Ewing sticker for miles date