Oil change flush

[DAKA]

A mate (retired large motor trader dealership ) uses a pint of road diesel in his engine oil before changing the oil, says the detergents in the diesel clean everything making fresh oil look brand new for much longer.

But I guess it will sort of screw up any oil analysis for a couple of seasons .

Does anyone bother with engine flush (either road diesel or known make) and what are the benefits ? any recommendations........

 

[volvopaul]

The whole point of changing oil at the correct and regular intervals on any engine wether it be a 5hp lawnmower or the biggest engine of all time is to reduce and remove the byproduct from fuel, ie carbon and all the other nasties a lab tech will tell you about, from the oil.

Why would you want to thin down the oil to wash the engine out, risk premature wear on the crank bearings, timing gears etc etc.

Cant see it myself, there are many products on the market that are proven to do the job.

I stand to be corrected, but ive stripped many an engine that has bosch, denso, cav rotary pumps that have had the shaft seal fail, net result a sump full of diesel, a very hard hit on the wallet for sure.

 

[sailorman]

A mate (retired large motor trader dealership ) uses a pint of road diesel in his engine oil before changing the oil, says the detergents in the diesel clean everything making fresh oil look brand new for much longer.

But I guess it will sort of screw up any oil analysis for a couple of seasons .

Does anyone bother with engine flush (either road diesel or known make) and what are the benefits ? any recommendations........

My dinky rocker cover @ 925 hrs of using supermarket oil
This is as removed no cleaning what ever
i adjusted the tappets last w/e

 

[MapisM]

uses a pint of road diesel in his engine oil before changing the oil

Not sure to have understood.
Does he throw in a pint of diesel with the old oil, spin the engine for a while, and then change the stuff as usually, OR does he mix the diesel with the new oil?
If the first, I can possibly see some sense in his approach.
Not so with the latter.

 

[sailorman]

Not sure to have understood.
Does he throw in a pint of diesel with the old oil, spin the engine for a while, and then change the stuff as usually, OR does he mix the diesel with the new oil?
If the first, I can possibly see some sense in his approach.
Not so with the latter.

sounds like the old / existing oil

 

[MapisM]

Yep, but daka also said making fresh oil look brand new for much longer, that's what confused me.

 

[Latestarter1]

Absolutely nuts!

Particularly if engine has hydraulic tappets, wrecks them in a trice..

As to the picture of the rocker cover I would be seriously cocerned, when guys used to 'cut' diesel with 30% kero in Zimbabwe engines looked clean like this inside, however 200,000 miles and engines were SHOT.

 

[DAKA]

Ok enough said, thanks, I will just change after warming as usual.


The diesel was added during the warming time and removed along with the old oil.
Apparently it cleans all the gum out and the fresh oil stays golden for almost a full season.

But I will listen to latestarter and not add diesel.

Having said that if my engines ever make 200 000 miles I will be well chuffed

 

[sailorman]

Ok enough said, thanks, I will just change after warming as usual.


The diesel was added during the warming time and removed along with the old oil.
Apparently it cleans all the gum out and the fresh oil stays golden for almost a full season.

But I will listen to latestarter and not add diesel.

Having said that if my engines ever make 200 000 miles I will be well chuffed

mine has done 6,475 to date

 

[Latestarter1]

Ok enough said, thanks, I will just change after warming as usual.


The diesel was added during the warming time and removed along with the old oil.
Apparently it cleans all the gum out and the fresh oil stays golden for almost a full season.

But I will listen to latestarter and not add diesel.

Having said that if my engines ever make 200 000 miles I will be well chuffed

Wheels of Africa were running Navistar 9800 cabovers in Zimbabwie with Cummins 855 410's 14 speed Fullers which under normal hot and heavy and high conditions normally did 550/600,000 miles before general overhaul i.e pistons and liners and reconditioned heads. Start buggering about with with fuel and lubes. All goes to heck in a hang basket!

 

[Galia]

For cars you can get a flushing additive eg Wynns Oil Flush ,
WYNN'S ENGINE FLUSH PRODUCT DESCRIPTION

The Wynn's Engine Flush Flush is a highly concentrated detergent, designed to clean all oil lubricating systems prior to an oil change. It quickly and efficiently dissolves varnish, sludge and other contaminants from vital engine parts and prevents contamination of fresh oil by residues left behind.

FEATURES & BENEFITS OF WYNN'S ENGINE FLUSH

425ml
Cleans engines, hydraulic systems, gearboxes and differentials internally
Quickly and efficiently dissolves varnish, sludge and other contaminants from vital engine parts
Prevents contamination of fresh oil by residues left behind
Neutralizes acids
Frees sticking internal engine components by dissolving deposits
Provides extra protection during the treatment
Quietens noisy hydraulic valve lifters by removing deposits
Is compatible with all mineral, synthetic, single and multigrade oils
Recommended for all petrol & diesel engines

However, I have never used it.

 

[rubberduck]

I have known some use this stuff with seriously **** results & at least one new engine.

 

[Latestarter1]

Lube oils have moved on light years and have super super sexy additive packs.

There is NO requirement for flushing oils, as modern lubes do a fantastic job at holding dangerous contaminants in suspension, particulary at Mickey Mouse marine lube oil drains. Additive pack barely breaks out into a sweat before being dumped.

Remember the engine manufacturer knows best, RTFM. Just spend on purchasing decent branded lube which meets the correct approval.

U.S EPA branded lube additives, flushing oils as expensive fraud (mainly kero based). However the additive manufacturers make huge profits and have correspondingly large marketing budgets.

Keep life simple by doing it by the book.

 

[macnorton]

A mate (retired large motor trader dealership ) uses a pint of road diesel in his engine oil before changing the oil, says the detergents in the diesel clean everything making fresh oil look brand new for much longer.

But I guess it will sort of screw up any oil analysis for a couple of seasons .

Does anyone bother with engine flush (either road diesel or known make) and what are the benefits ? any recommendations........

I have been doing the same for many years, put a cup of diesel in a hot engine and run it (without load) for 5 mins before you drain the oil. (diesel is oil you know!)

I also add engine oil to the diesel tank whenever I fill up.

 

[David of Essex]

If you are changing your engine oil annually, you are not likely to built up much contamination. Most leisure marine users are doing less than 100 hours between changes.
You are paying top £££ for the correct oil, why waste more money on an additive.
David

 

[shayneO]

Going in for an oil change or for vehicle servicing can often mean getting upsold on other products. One of these goods, an engine flush, is offered much more frequently than a motor actually needs it. Source for this article: The basics of an engine flush. Engine flush is a useful tool to help prolong the life of your car. You should have knowledge about flushing because if it happens that the technician uses too much pressure or does not use the machine correctly, there is a chance that it could cause damage to the engine which could include blowing out the seals on important engine parts.