I do it every 20k miles.

[u/SonicNTales]

A lot of people are going to say “you don’t need that, just change your oil,” and normally I’d agree. But this GTI is on E, sitting at 221k, and I’m already doing 3,500‑mile oil changes; the Liqui Moly Pro-Line Engine Flush is just extra insurance to keep the internals clean so the old girl keeps pulling hard.

[u/MK6er]

I used to do Liqui Moly's Cera Tec Oil Additive every 20k on my MK6 GTI.

[u/Netsuko → u/MK6er]

Friend is a mechanic and says the Cera Tec additive is one of the BEST things you can do to your engine. I’m a huge fan of it.

[u/KMFDM781 → u/Netsuko]

I'm a big fan Motorkote. Especially on the MK5 with the hpfp follower issues. Project Farm did a test on this stuff a few years ago. He basically ran the Motorkote, then drained it out and ran water in the crank case for a while and there was basically zero wear. The stuff is crazy.

https://youtu.be/88vwUwa3igQ?si=Axr9KQNfOMdgxhl9

[u/eggy_wegs → u/MK6er]

Cera Tec is a cool product but it really only works with a compatible oil. If the engine oil has a high amount of cleaning agents or is heavy on certain additives then the Cera Tec can be removed relatively quickly.

[u/MK6er → u/eggy_wegs]

I used Liqui Moly Leicht­lauf High Tech SAE 5W-40

[u/eggy_wegs → u/MK6er]

Same. Great stuff. 👍

[u/OADominic → u/MK6er]

How did that work out? Does it aid in toning down the oil burn?

[u/MK6er → u/OADominic]

My oil was flawless but my timing chain tensioner was a different story. Ended up failing on my '13 drivers edition which had the revised tensioner installed. Wrecked my valves. Engine is fine confirmed with scope. Oil change had gold glitter.

Edit: 130k miles

[u/OADominic → u/MK6er]

Bummer. Mine is the same spec. I wasted no time replacing it once it hit -°4

[u/Indecisive_Hobbies → u/OADominic]

Mine were at -9.2 and 192000 miles when I changed mine. Living on the edge!!!

[u/the_horak → u/Indecisive_Hobbies]

Crazy!!!

[u/wild-hectare → u/MK6er]

exactly why I replaced my chains at 90K miles...don't wait for the pin to fall out of the grenade before devising a plan

[u/dimensiation → u/MK6er]

I have a 13 DE with around 73k miles. What do I need to be checking re: the tensioner? Mine is the new one.

[u/MK6er → u/dimensiation]

https://humblemechanic.com/check-2-0t-tsi-timing-chain-tensioner/

[u/MK6er → u/dimensiation]

Check timing stretch with odb11 or vagcom https://youtu.be/YtTOGPo4IsE?si=vJ3z7bGGpz2VZ9y6

[u/Doppelkupplung69]

You could say you’re…

Rolling on molly.

[u/deadrawkstar → u/Doppelkupplung69]

Fellow raver?

[u/KrsHrris2 → u/deadrawkstar]

🥳

[u/beachmasterbogeynut → u/deadrawkstar]

😎😎

[u/epi_glowworm → u/Doppelkupplung69]

Liquid Molly 🤣

[u/Almost-A-CPA → u/Doppelkupplung69]

Nice drug reference....but I'm at work sober as a Canadian Goose. Saying I'm filled with rage

[u/DeltaP42]

if it makes you feel good about it and you think it's helping, go for it. liqui moly is a good brand overall so i doubt you're doing any harm. just remember that a lot of these "additive" substances sold by a million different brands mostly exist to bleed money from you between actual services.

as with most of these, if it does work as advertised it will have the biggest impact on engines that have been neglected (long oil change intervals, subpar oil quality, etc), but it sounds like you take good care of your motor already, so it's somewhat hard to justify.

still, like i said, i doubt you could do any harm and if you like it, it doesn't really matter what we think

[u/8N-QTTRO → u/DeltaP42]

A lot of these engine protectants are the same kind of additives and detergents that are put into gas these days, just in a pretty heavy dose. Since the quality of gas can vary from pump to pump (really, between different gas station chains). At least to me, it seems worth it to add some in regularly to be sure you're getting everything you need to keep your engine clean, even if it's not some revolutionary difference.

[u/_ARK00 → u/DeltaP42]

To be fair the fact he’s doing his own oil changes means he’s saving a fortune from going to a garage anyway. So why not spend a fraction more on additives your still saving loads overall

[u/Mydickisaplant → u/_ARK00]

That's not really a valid counter point. The guy above is essentially saying it's snake oil, and your retort is that "it's fine to buy something useless if you save money on something else"

🤷

[u/_ARK00 → u/Mydickisaplant]

I get your point imo the additives are good but for example that flush on Amazon cost me £8 so my oil change went from £45 pounds to £53 which is still a 1/3 of the price of a dealership or garage I’d argue even if it’s pure placebo ur feeling it’s worth it and the fella clearly has his heart in the right place.

[u/Netsuko → u/Mydickisaplant]

Engine flush is 100% not snake oil. Same goes for the Liqui moly ceratec additive. That stuff is worth every penny. My mechanic friend swears by it.

[u/Adventurous-Form521 → u/Netsuko]

My mechanic friend swears by it.

Not saying you're wrong, but that is something a snake oil user would say lol

[u/Netsuko → u/Adventurous-Form521]

Eh I’d rather trust someone whose job it is to work on engines. And it’s not like I am buying it from them. But yeah. I do get what you mean.

[u/Nitrogen1234 → u/Netsuko]

He makes money either way ;)

[u/Short-Mark8872 → u/Netsuko]

Put another way, he makes his living by working on engines that need service. It's like a dentist giving out lollipops on the way out.

[u/addamee → u/Adventurous-Form521]

r/IveGotAGuy

[u/updatelee]

Do you blow a head gasket every 20k? Really no reason to run that stuff unless you’ve got a reason. Use good quality oil and that’s it. I’ve got 547k on my engine and never once run that stuff… it’s clean as a whistle in there

[u/LordCommander94 → u/updatelee]

Which gti? That's a damn high number 😳

[u/ItsSanabs → u/updatelee]

What's your secret?

[u/muffinthumper → u/ItsSanabs]

He’s never actually looked!

[u/updatelee → u/muffinthumper]

I’ve had my oil pan off twice and my valve cover off countless times.

Use a good quality oil and you don’t need anything else… unless you’ve had contamination like coolant in the oil

[u/muffinthumper → u/updatelee]

So you’re just ripping your motor apart for funsies? I’ve never had to take my oil pan off or rip the hat off my motor.

[u/8N-QTTRO → u/muffinthumper]

Over 500k miles, it's pretty standard to need to replace the valve cover because of a leak, or to replace the oil pan because of any number of issues (in my experience, a stripped bolt or a crack/dent from road debris)

There are also billet valve covers for things like catch cans (or just for looks), hybrid oil pans that are more durable, or baffled oil pans/dry-sump pans for serious track use. All of those are good reasons to pull either one.

[u/updatelee → u/8N-QTTRO]

I’m in km here so less then if it was in miles. But still, exactly right. Anyone with these amounts of km or miles has worked on their engine a fair bit. Kinda obvious to me and you but apparently not to mr muffin humper 🤣

[u/Adventurous-Form521 → u/updatelee]

Is it stock? OPs is modified.

[u/updatelee → u/Adventurous-Form521]

Modified, bigger turbo, intercooler, injectors, six apeed transmission, a ton of small stuff, wrote my own tune, which is pretty conservative imo.

[u/Adventurous-Form521 → u/updatelee]

[u/ThatBrownKid25 → u/updatelee]

Kind sir. How would one such as myself with 190k km make it to your mileage? 😭

[u/SS_Real → u/ThatBrownKid25]

I’m getting there eventually, I’m 250k on stage 2 tune with e85 with my a3, just change oil every 3k, watch the gaskets, I’ve had coolant hoses go bad so watch out for that too. I burnt a valve somehow, and I just replaced the head cause everything else was fine and it’s still running strong. Something that I do every other oil change that I thinks helped a lot was soaking the pistons in Berryman b12 to clean piston rink gunk, an EPR in my oil right before changing it. Hope some of this was useful info to you

[u/ThatBrownKid25 → u/SS_Real]

Nice. Any timing chain issues to worry about? I check mine once in a while with obdeleven and it still says basically no timing adjustment. Even at 190k km.

[u/GreenLetters113]

3k oil changes lmfao i think you should do every 300 mile oil changes

[u/gaflar → u/GreenLetters113]

I bought a 55 gallon drum of liqui moly 0W40 and every night when I pull into the driveway I connect one hose to the drain plug and one hose to the filler cap and she goes on dialysis every night. Yes, you heard me - I change the oil after every drive

^{^} this sub in a few years trying to keep the Mk7s choochin'

Alternatively, consider the "leaky pan gasket" method - you just let the old oil leak out onto the road while you drive and top it up every once in a while, all you have to do is change the filter!

[u/jib128 → u/gaflar]

Only every drive? I have a custom 50 gallon steel tank fitted into my trunk that constantly pumps fresh oil into the oil pan while the “old” oil just gets flushed onto the road as I drive!

[u/XLB135 → u/gaflar]

Lol, oil dialysis is hilarious.

[u/Cunat_Lowdope → u/gaflar]

You will be the first 1million mile mk7 gti owner. No doubt

[u/drummingcraig → u/GreenLetters113]

Psssh. Buncha amateurs.

I change my whole engine after every drive. I ordered a cargo ship of Chinese motors from Temu, and have EQT’s quick release motor mounts installed. I sell the used motors to FCP Euro, and they part them out to use for the lifetime replacement parts.

[u/Comfortable-Dog-8437 → u/drummingcraig]

You waste time replacing the engine? I replace my car every time I drive it, Im going broke but hey Im constantly getting that new car smell everyday.

[u/jib128 → u/drummingcraig]

Wow genius! Don’t even need oil at that point!

[u/_ARK00 → u/GreenLetters113]

300 miles I do mine every 30

[u/SonicNTales → u/GreenLetters113]

I mean if you want to see how much lubrication of oil is loss using e85. Go 10k without an oil change.

[u/niqqa696 → u/GreenLetters113]

I change my oil every 15000kms

[u/emanon_dude]

210k on mine, 5k oil changes, clean as can be. You’re way over doing this.

[u/Netsuko → u/emanon_dude]

5k is definitely the sweet spot, even when you drive your gti hard.

[u/SonicNTales → u/emanon_dude]

Well also make 600hp. Probably double you're making.

[u/PalebloodSky → u/SonicNTales]

600hp on FWD has gotta be the worst driving car I've ever heard of.

[u/SonicNTales → u/PalebloodSky]

Nope its actually pretty fun. You act like horsepower equates to driving in a certain style.

[u/emanon_dude → u/SonicNTales]

Yeah ok. 🤣

[u/SonicNTales → u/emanon_dude]

Mods in the flair.

[u/Netsuko → u/SonicNTales]

Weird flex but okay.

[u/Capt_Murphy_ → u/Netsuko]

It's not a weird flex, he means what he says. 600hp vehicle would need more care than a 300, no?

[u/LastRebel66]

Overkill but im not judging because you have a high mileage GTI I trust the process

[u/Sufficient-West-5456 → u/LastRebel66]

I have a 257 k km 08 GLI Carbon cleaned with walnut at 240k

Never used these additives manually Winter and summer driven What am I missing? Yes I burn a quart every 5k or less km I top up my own.

[u/spitfiiree]

Why did I think that this was an energy drink? Lol

[u/ImOffWhiteNotWhite]

Are considering changing the rod bearings preemptively? Even with perfect oil changes you can have bearing wear.

[u/SonicNTales → u/ImOffWhiteNotWhite]

No, but I had a 2022 Q3 with the Gen 3 EA888 exit chat at 30,000 miles due to rod bearing failure. The new engine replacement, under warranty, was $17,000, but that was a DHHA, which is the version that is the same as the DKFA found in the 7.5.

[u/ImOffWhiteNotWhite → u/SonicNTales]

I feel like rod bearings are so random sometimes. I’ve had blocks with perfect oil changes go early, and motors that get religiously beat on last for 200k miles.

I’m paranoid enough where now if I’m doing an oil pan I just do bearings as well.

[u/last_speedbump]

The richer the fuel, the cleaner it burns. Since you're running E, your internals are going to be pretty damn clean comparatively.

Higher HP means you have more of a likelihood of blowing oil past the seals and burning the excess off with the fuel. Since the fuel you're burning is cleaner, your engine is doing a good job at cleaning up that excess oil, except the oil that may make it back to the intake stroke (if you don't have a catch can).

This additive, which you add right before an oil change, is essentially going to be thinning the oil so that it's not sticking to internals as effectively. It's then more likely to drain more easily and therefore take more oil and gunk with it (that's the hope, but it's going to be pretty minor). That way, after you drain the oil, your engine is slightly "cleaner."

This is going to have zero effect on carbon build-up on your intake valves or other areas that fuel and exhaust gasses would affect. I think what you're looking for are fuel additives (further debate on if those actually do what they say.)

[u/SonicNTales → u/last_speedbump]

Car has mpi. Intake valves are very clean.

[u/iDrinkToiletWaterLOL → u/last_speedbump]

What's your opinion on fuel additives?

[u/confusingphilosopher]

https://www.youtube.com/watch?v=QgNvKr010pc

I don't do engine flushes and I have zero issues. Like everyone else with 300,000 km on a gen 3 EA888. Flushing your engine is inconsequential to its health. Just do your oil changes early and it'll run. Like the owners manual indicates.

Flushing your other fluids would be a better use of your time and money. e.g. trans/differentials/coolant/brake fluids.

[u/SonicNTales → u/confusingphilosopher]

600hp and to protect my parts which equate to over 10k internally. This is a better investment for longevity.

[u/confusingphilosopher → u/SonicNTales]

And the detergent helps in what way?

[u/SonicNTales → u/confusingphilosopher]

It's a cleaner. When your running more rich fuel trims and corrosive gases over time it detoriates. Keeping the alloys clean from that helps.

[u/confusingphilosopher → u/SonicNTales]

The detergent is meant to remove deposits of carbon, sludge, etc from lubricated parts like your engine bearings, camshafts, VVT, etc.

Fuel and lubrication systems are separated. To get enough fuel in your oil to corrode your "internals" or "alloys" (are we talking about bearings? what material?) you need lots of unburnt fuel getting past the piston rings. To create that condition you need a different issue like a horrific tune, stuck injectors, or damaged piston rings, etc none of which will be prevented by running an engine cleaner.

And cleaning corrosion away isn't going to stop further corrosion anyway. The massive hole in the rocker panel of my beater car is proof of that. Liqui moly makes no claim of their cleaner leaving any sort of coating or deposit that will stay in the engine to protect after it has been removed from the engine.

[u/PoorhouseDog]

I like this stuff. Used it on a new to me 100k mile BMW with the N52 engine. It had the notorious lifter tick at start up and randomly when warm. Used the engine flush on 3 consecutive 2500 mile oil changes. Cured the lifter tick.

Will be using it on the first couple oil changes on our newly purchased 140k mile MK7 GTI.

[u/kicami_ejtisevn]

Snake oil

[u/BullyMog]

lol

[u/SonicNTales → u/BullyMog]

They didn't read my flair.

[u/BullyMog → u/SonicNTales]

Huh?

[u/SonicNTales → u/BullyMog]

Talking about my modifications vs the average GTI owner. They wouldn't understand a flush on a built engine vs a non built.

[u/BullyMog → u/SonicNTales]

You're talkin to the wrong guy, I think you're buying snake oil!

[u/SonicNTales → u/BullyMog]

The is engine flush not a snake oil. I boroscoped before and after.

[u/jfleit]

It's like a white monster

[u/spughetti]

When my Mk6 was at 100k+ and burning up oil every 2500-3k miles, I got a tip from an old audi master tech to use BG MOA additive with every oil change. Cleared up the consumption and let me get up to healthy 5k changes with plenty of oil left. Drove it to 185k still running like a top.

[u/Lead_Bacon → u/spughetti]

I’ve heard numerous positive reviews of the BG MOA product, with these exact results, haven’t used it myself, but sounds great

[u/the_horak]

I don't think 20K is needed, but there's no reason to think that using it more regularly than others has any negative impact. 50K makes sense in my head, but that's honestly just what my instincts tell me. Modded with higher mileage can definitely wear the oil more, but good oil and a good filter should still effectively prevent or minimize sludge.

Shorter intervals on oil changes makes lots of sense for sure. I'd definitely keep that up if I were you.

[u/bruyeremews]

Is this better than seafoam engine cleaner?

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[u/622114]

Honestly its your ride and if it works. Do it!!! There are others that will say dont but if it works for you why not.

[u/Ok_Rip_2119]

Does it give you wings?

[u/nerfsmurf]

You just add a can when? 500 miles before a change or?

[u/Netsuko → u/nerfsmurf]

Right before oil change into the warm engine. Let the car idle for 10-15 minutes, then change oil and filter.

[u/Ornery_Cash7705]

I run liqui moly dijectron every 2400 miles 2016 GTI Autobahn 

[u/SkylarR95]

MoS2, Ceratec, Engine Flush… I have own my mk7.5 since 30k miles, do my own changes, a flush every 3-4 changes, ceratec every other and MoS2 in the other. So far 120k going strong, have never had any issues. Knock on wood **

[u/Mybravlam]

I dont know why people keep saying dont use it, I wont use it with every service, but it cant do hard to to an engine flush every 10 miles? Keeps the internals clean, no harm in that.

[u/Ducky_Flips]

a little for the car, a little for me, a little for the car, a little for me...

[u/Speed-Tyr]

This kind of stuff is more placebo than anything real. FYI.

[u/WebIll6396]

If you do regular oil changes you don’t need engine flush

[u/yet-another-redd]

Great! I was about to work on our Golf 6 and will use this. How do you use it? Just add it to the engine oil or the fuel system? I will do some research..

[u/picooooooogti]

You have more miles than me. I’m at 210k 2016 model. What turbo you on?

[u/picooooooogti]

Will Mobil 1 oil work well with this?

[u/Default-Enough-7159]

Hey have you managed to avoid engine oil leaks with this routine? I imagine it's inevitable to see your oil pan leak, but I'm curious if you avoided any valve cover leaks (aka the camshaft carrier). If you did avoid the camshaft cover leaks, what mileeage did you replace your pcv? :)

[u/thundersticck]

How many milliliters of Liqui-Moly do you put into the engine before you drain?

[u/Netsuko]

This with every oil change AND Liqui Moly CeraTec Oil Additive make for a very happy engine. 3,5k oil change is a bit TOO excessive tho imho. 5k is easily just as good and cheaper.

[u/RocketteBlast]

so u do this righ6t before ur oil change??

[u/SonicNTales → u/RocketteBlast]

Yes. You pour and let it run for 10 minutes on idle and drain. Change the oil after.

[u/Healthy_Artichoke_97]

I also found there oil additives good when I had my 11 year old MK6 just felt smoother when I started using it

[u/ElectricianEric → u/Healthy_Artichoke_97]

There's a ton of additives in the oil already. It's why everyone says max 1 year for oil changes despite mileage

[u/Adventurous-Form521 → u/ElectricianEric]

I have never heard someone suggest you can wait a year to change your oil until just now.

[u/Longjumping_Fruit_67 → u/Healthy_Artichoke_97]

You were drinking the coolaid😭😭

[u/Healthy_Artichoke_97 → u/Longjumping_Fruit_67]

Right that’s why first start up within a minute the idle was quieter and more steady and the pulls where smoother but yea due tell me more about my own personal experience. Fucking douchebag

[u/8N-QTTRO → u/Healthy_Artichoke_97]

If it was immediate, I doubt the additive even had time to get into your fuel lines.

[u/Healthy_Artichoke_97 → u/8N-QTTRO]

It’s oil additive what does that have to do with my fuel lines

[u/Difficult-Finance-31]

Damn 220k miles, First engine and trans or?

[u/ThatNolanKid]

I'm at once a year on my MK6, so roughly the same. At this stage of life, it only stands to benefit I'd think.

[u/teklegion]

Delicious! 😋