Best engine oil

[seano]

Whats the best engine oil to use in a 2003 sti8.Thanks

[craig mac]

I run my 05 sti9 on Millers 10/60.

Will you track your car? Do you drive it hard? etc.

Its all relevant when picking the oil for YOU  and YOUR driving Manner m8 

[seano]

Thank Craig ,i dont think i will be tracking the car and i dont drive it to hardish if that helps.Do you need to remove the engine speed sensor and crank the engine over for a few seconds, or is that a mith????. Im an VW&Audi tech and i or my work mates have never done this and we have never had any probs.

[paddy247]

Think its a bit of myth, just make sure you prefill the filter before you put it on. may take a few pours as the oil settles down inside the filter, new sump plug washer and about 4.5 ltr of oil. once the engine has been run for a few seconds key off and check level, it may require a slight top up.

Do you remove the remove the crank sensor or disconect it in the morning when your car has been siting all night and all the oil has drained in to the sump? its just pub talk that one!

Millers 10/40 or 10/60 if you like to drive it that bit harder, tend to stick with 10/60 on modifed or sti in general.

Paddy

[seano]

Thanks very much paddy247.Like i say iv never done that in my life when servicing cars even on high performance cars like rs4&rs6s.Im doing the plugs tomoro (thats if i can sneek it in to my work an get it up on a lift)

[scoobaroo]

ITS NOT A MYTH , you should always crank the engine over when doing oil change.

Give any Subaru specialist a phone and they will tell you the same.

Have heard a few stories concerning the above and wouldnt chance it m8, disconnect the c/shaft sensor and turn it over a few times until the oil light goes out, job done [Y] not worth the risk.

p.s. I use Motul 10/60 [Y]

Marty.

 

[craig mac]

ITS NOT A MYTH , you should always crank the engine over when doing oil change.

Give any Subaru specialist a phone and they will tell you the same.

 

Marty

I thought that Paddy and the lads at AWD were specialists []

[the squiggle]

ITS NOT A MYTH , you should always crank the engine over when doing oil change.

Give any Subaru specialist a phone and they will tell you the same.

 

Marty

I thought that Paddy and the lads at AWD were specialists []

The Impreza crank is very small for the power it is designed to handle, the big end shells are bigger on a Saxo than the equivelent in the Impreza.  With this in mind i would rather give the Crank as much protection as possible when replacing the fluid designed to protect the tolerences in the Big End Shells.

 Being the sad man i am, when doing an oil change on my car i pull the plugs out, unplug the cam sensor and crank the engine over until the light goes out on the dash.  When the light goes out, i then reconnect the sensor and fit the plugs.  This stupidly inane procedure is something i carry out on my own car for my own peice of mind.  I dont recommend this over time consuming procedure to anyone as they look at me as if i am mad

When the oil is sitting in the sump and rest of the galleries and shells are empty, crank the car over with the plugs in place and all sensors connected the tiny, designed to be filled with oil, space between the Big End Journal and the Crank will dissappear very quickly with NO protective cushioning and the bottom end of the engine will run metal to metal with a severe compressive force acting upon it as the explosive four stroke cycle starts to take effect and is happening directly above the dry Crank, that will run metal to metal until oil pressure is sufficient to fill the all the galleries in the engine to a level that will float the Big End area of the Crank.  Disconnecting the crank but leaving the plugs in place, there is still a compressive force happening above the Big End Journals but because the Sensor is disconnected there will be NO explosive force shooting the Piston down the bore and causing a severe shock strain on the area of the Big End.  At a rough guess the engine will spin about 3-4 times before the ECU fires it up, after the engine starts it will take another maybe 10 - 20 turns of the engine before oil pressure is enough to fill all the galleries to a sufficient level the the Bottom End of the block is now fully protected with a Viscous fluid and this Viscous fliud is now taking the shock of the explosive 4 stroke cycle but for they 10-20 plus turns of the engine it will be running dry with no Oil doing the job that the Oil is meant to do.  The complete removal of the Spark Plugs and disconnection of the Cam Sensor will allow the Crank to spin at a decent speed until the Bottom End gets all nice and lubed with loverly pressurised oil with no undue strain or pressure on the ickle Big End Shells because there is no strain acting upon the Bottom End from above because the engine is not trying to compress the gas in the chamber above it or firing the gas to start or run the engine

 Regarding all your oil returning to the sump in overnight, yes possibly but some of the thick oil still remains in the horizontal aspects of the galleries (hence the reason the use of flushes are now becoming more populer) i removed my remote oil filter and left the pipe dangling, after about 4 weeks it eventually stopped dripping oil))  Yes all your oil returns overnight if it has lost its viscousity due to a variety of factors like age, quality, petrol contamination and the like.  In a galaxy far far away i used to fill the old Yellow Orions CVH with a decent amount of petrol, crank it with the plugs removed and then remove the petrol from the sump.  After one minute of cranking the sh1t that came out the engine was not healthy looking but the old dog ran so much better and the new oil stayed Golden for a decent amount of time.

 Just my method and the reasons why i do this method

As is said, people look at me as if i am, i am mad

Another Bowl Vicer

Vote for Terry the Baboon to be your next council leader

[wrxmania]

Whenever Extreme Motorsport oil changed my last Impreza I asked them to disconnect the crank sensor - it takes 2 minutes - although they did not do it automatically - thought there was no need like many people.  Also, my current car has not had that done but, due to the engine being so "special", I want to get this done in future.  Has not done it any harm thus far mind you (that I know of) but better safe than sorry.  It won't worry me asking to have this done (if its' in a garage) just to save a little "oh you don't need to do that" etc...the reply would be "no, but I'd like it done thanks []"

And I'm sure AWD would assist in doing this if the customer wished.

Brian []

[scoobaroo]

You beat me to that 1 Grant []

Marty.

p.s. hope yoo get yourz cranked Craig []

Marty.

[paddy247]

Im not an expert/specialist yet. I have compleated a City & guilds Qualification and i am lucky enough to get work experience with some of the best Subaru tec's around. And I tend to practice what is taught to me by much more qualifed and experienced tec's, and not what someone read or heard in the pub!!

Maybe MYTH is the wrong word to use and MEASURABLE would be better, As I would be very interested to find out the measurable damage caused by not doing this procedure of disconecting the crank sensor and removing plugs ect.

When a straight forward oil change is involved and the Engine has not been flushed, I dont think the gallerys will be dry and neither will the space between the big-end journals and the con-rod big-end bearings, they migh not be suported by oil pressure imediatly but thats just the same as having your car sitting for a period of time before starting it up.

When the engine has been flushed or in the extreme case of an engine rebuild then different procedures are required before starting it up.

Grant your Skills are wasted and I would not like to get Philosophical with you after a few j's lol[]

Paddy

 

 

[seano]

I agree with you there mate

[the squiggle]

I agree with anything said in this here thread.

Paddy, i could not even spell that word after a few J's, let alone discuss it.

[paddy247]

I think there could be two ways to spell that word lol, []