Hi guys...i believe you all will do engine flush whenever you all service your car (changing engine oil). I have a fren..he say he dun trust those engine flush oil...what he do is keep the balance engine oil everytime he service his car...once he have around 2 liter plus...he mix with petrol....roughly about 70% engine oil 30% petrol...then

1) he drain out all those oil engine oil without replacing the oil filter yet...
2) screw back the oil sump nut
3) he pour in back the mixture of petrol and engine oil
4) start the engine without revving it for about 5mins to 10mins
5) off the engine...
6) drain out all those oil again
7) change the oil filter
8) pour in fresh new suitable engine oil

result : after he flush out the engine oil that mid with petrol...the engine oil really become thick...it thicker than the engine oil that stay inside his engine for 5000km .....means it really bring out all those carbon stuck at the wall of the engine...

so my question is .....will this method harm the internal parts of the engine ? such as those oil seal? gasket...or whatever part you all think offf?

the petrol itself easily to vaporize, n strong chemical.. wont it harm the internal engine?

i dun flush my engine... i do regular changes every 5000km...

i also do change my engine oil every 5000km...im using semi synthetic oil that require me to change every 7000km...but if really can flush out the carbon , then that is good....

very high cost, need half bottle of engine oil and then the petrol...

and you sure that is carbon and not something else?

yeah...sure is carbon...if not wut else wor? coz after mixing the petrol into the engine oil...the engine oil seem to be thinner...but after 10mins run....when drain out...the engine oil is thick n black....

that is not called carbon i presume... carbon only exists in combustion chamber... not ur engine oil sump... mayb its some metal residue due to metal-to-metal shaving...

The thick, black stuff is probably mostly sludge?

Another way of flushing is to use a cheap mineral oil as the flushing oil for maybe 10~15 mins, after draining out the used engine oil. Then drain again, change the oil filter and fill up with the engine oil of yr choice.

U can also shorten the oil-change interval to maybe 2k km or so as a flushing job, then change oil again and follow the usual oil-change interval.

some service centres(not to mention which)...use diesel to flush...very clean

or use a thinner grade cheapo engine oil to flush

Bardahl

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Added on May 27, 2009, 2:55 pmtell u guys how... normally our engine only takes in about 3.5L of engine oil each service interval... the remaining 0.5L u keep it in a bottle... after about 7 oil changes, u'll have 3.5L of extra'ed engine oil available for flushing...

This post has been edited by the_catacombs: May 27 2009, 02:55 PM

but make sure u keep the remaining engine oil sealed or not exposed to air...

lolz... of course...

not 1st in 1st ooout>? ?

Some people just use diesel engine oil that's also rated for petrol engines, as diesel lubes usually contain more detergents compared to petrol engine lubes. Examples include Caltex Delo 400 15W-40, Mobil Delvac MX.

so the conclusion is not advisable to mix petrol and engine oil together to flush our car engine?

Just buy a can of Engine flush, instead of leaving the car idle for 15min, shorten the time to 10min, this product is corrosive, so you do not want to leave it for to long, once after that every 20k - 50k oil change use 1 can of engine flush will do.

you don't have to use it regularly.

try auto-rx

Where to get it in Malaysia?Price?

Don't think auto-rx is easily available here. And I was told it takes like 10k km to work properly.

I think the STP Engine Flush states on its label that it's not corrosive. Donno whether this holds true for engine flush from other brands though.

can try CRC engine flush

actually how often are we required to flush engine? changing oil only is not enough?

More than 50,000 of milelage, should be the time to use engine flush.

one thing i feel discomfort about flushing oil is .. after you drain it, there is still little bit balance of it inside the crankcase. as you may know, most flushing oil is kerosene-based. kerosene shears oil faster. the flushed oil looks very dark because you're flushing using the old oil filter. the flush oil mixed with the crap inside oil filter hence giving the "OMG my engine is so dirty and this thing really cleans" impression. flushing using a new oil filter wouldn't look that dark, unless the engine is stuffed with sludge.

agreed with previous poster, flushing oil doesn't clean carbon deposits from combustion by product.

IMHO, as long as you're using top tier@mainstream oil with proper interval, you engine should be free from varnish/oil related residue. no need to spend extra for flushing.

This post has been edited by kapal: Jun 1 2009, 04:35 PM

but in other way it's not wise 2 use new oil filter also cuz as u said sludge n crab will go thru d oil filter but not all can go pass d oil filter so kinda waste if u use new 1~

pardon me but why flushing using new filter is it a waste? the purpose of oil filter is to trap dirt.

of cuz it's good but u make d new oil filter's life span shorter n sum dirts might harmful stays in da new oil filter during after flush n use new engine oil wit it~

then juz buy 2 new oil filter lor, n use one for flushing n another one for new engine oil..

got at rm98.00 from my member..

agree... i bought 2 oil filters, one for flush then replace with another new one for the proper oil.
besides flushing is not on every oils change, so it's negligble.

that's what i'm trying to say earlier on..

damn, I just did flushing last friday. it was more than 15 minutes. but somehow, feel the engine was replenished to a better state

so after tat throw away? ?

yes cheeann-san, throw the oil filter away. to put it simple:

* drain old oil
* replace oil filter
* pour in some flush oil
* run your engine accordingly
* drain the flushed oil
* replace oil filter

oh,nvm la~
i dun like waste money~
jus flush wit old filter n then 1 time change new filter wit new oil can edi~