Liqui Moly Engine Flush: My experience

[Brandon Gatz]

2012 LS460 at 201k

She's idled high and has sounded a bit like a diesel at cold start for the last 30k miles or so.

Enter LiquiMoly Engine Flush for the first time yesterday, ran for 15 minutes prior to drain. Filter was pitch black and weighed about 2lbs.

Fill: 9.2qt Castrol Edge HM 0w20, no LM additives added.

The previous idle was 750rpm, new idle at 500. She runs smoother and feels a bit quicker, but 386hp bone stock.

The engine had to be sludged quite badly for this level of improvement. I'm a happy guy, wish I'd done it sooner.

Adding LM Ceratec this week.

 

[demarpaint]

I'd skip the Ceratec and run a good oil all by itself now.

 

[adams355]

I am a big fan of quality engine flushes but you don't need ceratec with that quality oil.

 

[sk_pete]

https://tech-beac.com/sites/default/files/support-document/MSDS-ENGINE-FLUSH-PLUS.pdf

this?
i wonder if cup of white spirit would do the same.

 

[adams355]

https://tech-beac.com/sites/default/files/support-document/MSDS-ENGINE-FLUSH-PLUS.pdf

this?
i wonder if cup of white spirit would do the same.

Did you even read it? White spirit lol chuck some ATF in there as well...

 

[MalibuRam65]

i was told ceratec was good stuff and help the motor purrs like a kitten

 

[Graham Piccinini]

I don't think it was sludged up. And even if it is - 15 mins on a flush won't clean the whole engine much. Speaking from experience with a Toyota sludger and hundreds of dollars in various engine flushes. (Wish HPL Engine cleaner was available back then.)

What most likely DID happen though, is LM Engine Flush just cleaned up the tiny passages in VVT solenoid. That one also comes from experience. Removed and thoroughly sprayed a VVT solenoid (with brake cleaner) for one high mileage Lexus - and it felt like it gained 30hp across the range. Ran some Marvel Mystery Oil in the crankcase for other 3 high mileage Lexus vehicles, and similar results were observed.

 

[Owen Lucas]

I'd change the oil and filter afterwards to remove any leftover residue from the dirty oil or loose sludge still floating around.

 

[930.engineering]

The previous idle was 750rpm, new idle at 500.

And that does sound reasonable to you?
.

 

[kschachn]

And that does sound reasonable to you?
.

There was another guy that used to post on here about a different oil additive. Among other fantastical claims one of his was that it changed the idle speed. I always wondered how an oil additive could affect the engine management system.

 

[Trav]

2012 LS460 at 201k

She's idled high and has sounded a bit like a diesel at cold start for the last 30k miles or so.

Enter LiquiMoly Engine Flush for the first time yesterday, ran for 15 minutes prior to drain. Filter was pitch black and weighed about 2lbs.

Fill: 9.2qt Castrol Edge HM 0w20, no LM additives added.

The previous idle was 750rpm, new idle at 500. She runs smoother and feels a bit quicker, but 386hp bone stock.

The engine had to be sludged quite badly for this level of improvement. I'm a happy guy, wish I'd done it sooner.

Adding LM Ceratec this week.

No half stepping, go all in.

 

[hrv]

No half stepping, go all in.

View attachment 98988

View attachment 98989

and dont forget to install the fire injector spark plugs too

 

[Trav]

For sure they will add another 10HP a few nano unicorns in a can after after the chemical rebuild and the thing will be like greased lightning.

 

[hrv]

For sure they will add another 10HP a few nano unicorns in a can after after the chemical rebuild and the thing will be like greased lightning.

and dont forget the moly crap too...

 

[Zee09]

No half stepping, go all in.

View attachment 98988

View attachment 98989

As a kid I used this stuff...
Still have the same tractor

 

[crainholio]

2012 LS460 at 201k

The previous idle was 750rpm, new idle at 500. She runs smoother and feels a bit quicker, but 386hp bone stock.

Idle RPM is managed by the ECM. Possibly your 750rpm idle was with the AC on, and 500rpm was without?

 

[vvti16valve]

The previous idle was 750rpm, new idle at 500.

Adding LM Ceratec this week.

very confusing.. is that normal for you?
please look at your manual and you will know what is the normal idle rpm for your vehicle..

with that quality oil, for me, there is no need to add additives anymore..
the problem is clean the sludge first..

LM ceratec ? you don't need it right now..

 

[MolaKule]

I do know this one works and it does it gently:

High Performance Lubricants Engine Cleaner

Since the topic has come up a few times I am posting the PDS in the PCMO, Diesel, and Euro sections. This is a safe path to clean varnish and or sludge left behind by other oils. There are no solvents in this oil. It has enough ester to clean but still be safe with elastomers. Simply add a quart...

bobistheoilguy.com