When changing oil, do people use engine flush? Or isn't it very healthy for the engine?

 

I don't use it, just drain the old oil and replace with new.

 

Yeah, I normally do. But a mate said I should be using engine flush.....

Just wondered what the general concession was really on it. I'm guessing the majority of people don't use it.

 

NEVER USE ENGINE FLUSH ON A SUBARU!

don't listen to your mate unless he is willing to fix it once it starts rattling like a bag of nails.

 

yeh, ive been told by api never to use engine flush in a scooby unless i want to rebuild it afterwards.

 

DO NOT EVER put engine flush in a Subaru engine

 

why not?

 

 

Cool, thanks! That will do for me.

 

Subaru turbo engines fail when run on 5W and 0W oils imagine what a weak mixture of oil and paraffin will do......

Proper regular oil changes with proper oil :- 10W40 or 50 or 15W40 or 50 fully synth any well known brand.

David

 

Fair enough

 

What about detergent based flush with no solvent in?

 

the service manual does indeed say than 5w is "not suitable for sustained high speed driving"

 

I agree with ZEN, I have used a diesel oil at every other oil and filter change since buying my car brand new. It happily runs a healthy 400 bhp at nearly 90,000 miles. All I used to do was drain the oil, refill then let it tickover for 10 minutes with the occasional blip on the throttle to spin the turbo and push the oil through at a higher pressure. If required I would repeat then change the oil and filter.

 

The reason I ask is I have tried the Forte flush on a few high mileage cars with slappy pistons. The theory was that we have found very gooked up piston rings on some of these when rebuilding, and a flush does seem to sort it out, with better compression test results and less noise. But we wouldn't as a rule flush an engine, and never, ever with any solvent based flush.

 

We used to use Forte in our regular engines, particularly diesels, which have a high incidence of rings being gummed up.

But we started to experience failures of crank bearings in engines where you could guarantee to never have a crank problem [ Every other problem, sure, but never cranks ]

We had a Nissan dealer get heavy with us and we looked to Forte to assist us.

They were less than useless and couldn't contemplate going to court and losing - it was far too important to them not to have bad press.

So they left us to sink.

We severed our contract with them and I've never been back.

In many engines of all types there can be a case made for a flush. What I am saying, is that the cranks and bearings on Subaru are the known achilles heel of the engine. Why risk it by running the doubtful crank on anything less than the best oil you can afford?

David

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Fair enough David.

 

jesus.... think ill give my bottle i just got to put in my brothers v5 golf then as it aint had oil done for around 3 years and will prob need it

 

First thing, this is not a dig at you at all bud!! i'm just putting this because of what you have said and is a general comment for using a flush!!

You wouldn't or shouldn't be driving around with the flush in the vehicle, therefore you're not putting the engine at high risk by driving it hard or underload with a thinner mixture of oil in the engine

Second, I use Wurths engine flush in my classic and not had any problems. We've used this flush on every service for 6 yrs on all types of vehicles and again had no reports of any engine damage. We add the contents of the can, run the vehicles at idle for 5-10 mins and then drain and change the filter.

This is what Wurth say:


Synthetic and semi synthetic oils are used in most of today's vehicle engines. These types of oil keep their viscosity for longer and helps to prevents "black sludge" building up. However, one apparent weakness of synthetic and semi synthetic oils is that they are not as soluble as the old mineral oil so it doesn't absorb the by-products of combustion (dirt and particles) as well.

If these particles are left to build up they can start to clog oil ways, starving the engine of vital oil. This can lead to premature wear and failure.

Würth engine flush has the following properties:

* Active surfactants to thin the old oil; break down sludge and particle build up to ensure maximum drainage.
* A detergent to clean away residues, unclog oil ways and neutralise crankcase acids.
* A lubricant, Organic Molybolan Compound, to protect the engine while the solvents and detergents are cleaning.


Still this is my own choice and everyone else has their's

 

Mine has had no problems after having a Forte flush done on it.... the idea isn't to run the car anywhere with the flush in the oil but to indeed do two oil changes.

empty the old oil form the engine.

Fill the car up with some fresh oil + flush

Run car for 20mins (stood still)

Dump new oil with Forte in it

Put new decent oil in the car

when I had mine done it appeared to take a lot of the crap out of the engine and it did indeed provide positive results on a compression test.

I wouldn't normally do this to my car and it was run strictly as a test but the results were positive and I have had no problems at all. this was it's first flush ever (45K miles) and it WILL be the last one unless I start experiencing any problems.

Just my 2 pence worth

 

Oh dear!, you are in danger of reading the labels and believing the hype. No doubt they do flush something out.

The additives business is worth billions every year.

Just like face creams and anti wrinkle potions for women - Do they work? I think not.

David

 

Nope not reading labels and believing hype, was purely testing, I personally didn't think those things work and I certianly won't be making a habbit of putting that stuff through my engine but the controlled test results were conclusive.... The compression figures went up.

I'm not saying you should or shouldn't use it, I'm not in the position to give such advice.

As for anti wrinkle cream, I'll PM you my wifes number and you can explain to her your Cream theory, Christ you stop her buying that and I'll be able to afford a Monster engine rebuild

 

As for anti wrinkle cream, I'll PM you my wifes number and you can explain to her your Cream theory, Christ you stop her buying that and I'll be able to afford a Monster engine rebuild [/quote]



I ain't that brave.