Most detergent? Best short-term cleaning oil?

[Merkava_4]

Valvoline Maxlife is good at removing varnish.

 

[benjy]

ester oils clean the best, think Redline a group V oil, one of the very best oils today!!

 

[barkingspider]

Cheap syn Supertech is good for cleaning and short OCI.

 

[MalfunctionProne]

Several ways to do this.

First would be to add a full can of Seafoam to what you have in there, and drive for about 1000 miles and then change the oil and filter. Nothing bad will happen.

Second would be to use Redline, as mentioned at least twice.

Third would be to use a cheap (inexpensive) oil, and do some old-school 3000 mile OCIs - a fine waste of oil and money. Maybe even time.

Wondering if the engine needs it, as mentioned. Pics of the fill hole?

Opinions, based on facts:
M1 is an excellent oil
so is Pennzoil
so is Rotella
so is Valvoline Maxlife - was the synthetic version axed?
so is Redline, it is hard or impossible to beat Redline.

There are others...
Opinions, based on reading:
Castrol is not as good, save new Edge 0W-40 in a Volkswagen engine (off topic)
Royal Purple is gimmicky but not necessarily bad
Supertech - any Supertech - is very good

I have tried many any I switch up which ones I use.

Your engine will stay clean with just about any one of these, if serviced and oil changed even a few times or more, as stated. Agreeing with Mobil 1 probably keeping it clean.

When was the filter last changed?
How does the dipstick look?
How does the fill hole look? Underside of cap?
Valve covers ever been pulled?

 

[camrydriver111]

Originally Posted By: MalfunctionProne
Opinions, based on facts:
M1 is an excellent oil
so is Pennzoil
so is Rotella
so is Valvoline Maxlife - was the synthetic version axed?
so is Redline, it is hard or impossible to beat Redline.

There are others...
Opinions, based on reading:
Castrol is not as good, save new Edge 0W-40 in a Volkswagen engine (off topic)
Royal Purple is gimmicky but not necessarily bad
Supertech - any Supertech - is very good


I've looked at some of the Castrol UOAs on here and their oils seem to be performing fine.

 

[285south]

Run Cheap Syn Supertech for 1,000 miles, then run Redline for 6K, and then Mobil 1 EP at 10K OCIs. Never lose sleep again

 

[virginoil]

Originally Posted By: ringmaster
I recently bought a used car with 60k that calls for M1 0W-40 as the factory fill but I would like to run a really potent cleaning oil for ~500 miles to clean the internals as much as is safely possible so I have a good baseline.

Is there a high-quality oil that is known for having excellent cleaning characteristics or should I roll the dice and dump in a can of Liqui-Moly Pro-Line Engine Flush (500ml)?



Just run a shorter OCIs.

How clean is clean and what diff will it make whether is it 92% or 98% cleaan.

Mobil 0w-40 supposed to be one of Mobil's better cleaning oils.

 

[virginoil]

Changing the plugs, air filter, using a top quality fuel will probably assist the cleaning process etc more than using an engine oil with stronger detergents.