assti

I drive a version 6 sti which is more or less standard. I was just wondering if Mobil 1 0w-40 fully synthetic oil is suitable? Could it cause me any problems as it is only 0w so a bit thin.
I have 8 litres of the stuff but if there is any chance it may cause engine problems I'd prefere to put my hand in my pocket and buy something more suitable?
Also how much oil is needed during a oil and filter change?

bpm1588

don't know if i would chance 0-40.i am no expert but i have allways used 10-60/15-50 castrol rs and motol.never had any prob's.

burt2000

iTrader: (1)

id say 0w-40 is too thin imo, but im no oil boffin, im using millers CFS 10w-40 for winter and if you can get yourself a 10 or 15w-50 of any of the below brands for summer are recommended, any of these brands are highly regarded on here

Motul
Millers CFS
Silkolene
Castrol RS/edge
Mobil 1 motorsport

New_scooby_04

iTrader: (4)

Don't use that!!
0w not suitable for scoobies!!

Get a proper fully synth oil like silkolene pro s. I believe 10w 50 would be best for your car. Check with a reputable tuner though.

Ns04

andythejock01wrx

As per New Scoob.

I use Silkolene Pro S 5w40, recommended by "The Oilman" in here.

Baker

Ive chosen to use Mobile One 0w40 due to the fact I dont do long journeys that often, more short trips sometime only a few miles.

Im no oil expert but I thought using this oil would be good for winter protection, certainly sounds quieter on start up.

So I take it that this grade of oil would be no good for sustained hard driving? (track days)

Jam Performance

iTrader: (3)

Keep away from that oil! Sell it on ebay or something as it will definately cause damage..Use a good quality oil e.g. Millers,Silkolene, Motul, castrol or even mobil one in the following form : 10W40, 10w50, 10w60, 15w50

New_scooby_04

iTrader: (4)

I really wouldn't use that mate. David from Api contributed to a thread a little while back and said that 0w oils were too thin and that a good proportion of the rebuilds he had done had been on engines where the owner had indicated that they had used a 0w oil.

andy97

iTrader: (1)

I ran 0w-40 mobil one on my standard uk turbo for 87k miles. I never had a problem with the engine/auxillaries.

Now my car is modified with a 2.5 block, I use motul 15w-50.

Note, I didnt change the block because of a fault. In fact the engine builder said the OE block displayed normal wear for a car that has done 87k, he wouldnt recommend that people use 0w, but I didnt experience problems with it. It didnt burn any oil between services(7.5k)

Andy

MaDaSS

I have used TSL, RCM and Scoobyclinic and two of them used 15w 50 in my car, so there must something in it! lol. I cannae remember what the clinic used so i dont wanna misquote that info.
Who am i to argue?

maydew

iTrader: (9)

Silkolene Pro S 5w40

jonny gav

iTrader: (1)

10w40 or 15w50 are seen as the best viscosity oils for scoobs from motul, millers,silkoline etc... don't listen to "The Oilman"

he is a salesman not a specialist!

i will never forget when he went on 22B trying to spout some rubbish about bubbles in oil, he was shot down in flames

Trucker Ted

Steer clear of 0w viscosity ,too thin for the Boxer engine. You would perhaps get away with it in really cold climates but here Millers cfs 10w - 60w is the way to go . In fact you wont go wrong with any of the millers fluids.

A wee link to their motorsport page.
Ps (i,m not an oil salesman just know a good product when i see it)

Untitled Document

Fangoria

iTrader: (1)

Anything less than 10 is too thin - you've been told so use at your peril
Anyone who knows anything about Scoobs knows that 0/40 or 5/40 is living very, very dangerously

I would be highly surprised if an ool specialist recommended 5/40 unless he had a great deal with his supplier - this is downright outrageous to recommend

Motul is one one of the best
Castrol also ok

type36lotus

Here in the US, the factory reccommened viscosity is 5w-30. I use Motul 5W-40 and would prefer a 10W as I think a 5 winter weight is too thin (and unnecessary here in Florida!). But as I have my dealer maintain my car and all they have is 5W stuff, I will live with it.

andythejock01wrx

Where are you getting your information ? (Other than Scoobynet).

FWIW - my Subaru manual recommends 5w30.

jonny gav

iTrader: (1)

just experience of high performance engines over the last 15+ years.

i personally wouldn't run a 5w oil in any high performance turbo engine, they get far too hot IMHO.

have you seen the width of a shell in a subaru engine!

John 37

Surely when the engine is hot, the 0W is irrelevant as that's the cold viscosity rating.

John

jonny gav

iTrader: (1)

yes thats true but when oil heats up it gets thinner so if you are starting with a very thin oil (low viscosity) in my opinion you are asking for trouble!

Fangoria

iTrader: (1)

I'm going to caveat my response by saying that 5w is maybe ok in a totally standard UK car. Saying that I do here of a lot of Scoob engines going bang

As most people run modified versions (PPP, Ecutek and far, far more) then you really do need the 10-15/50-60

johnnyroper

i have got 15w50 mobil one in mine,oil pressure 40psi at idle and max oil temp of 95 degrees
as previous posts i would not use 0w40 especially if modded.

andythejock01wrx

Ok, thanks.

John 37

Yes but at high temperature (100C I think), the viscosity is at the other standard.
So SAE10W50 and SAE0W50 have the same viscosity at 100C.

John

tsl202

castrol edge 10w60 never had any problem

assti

Thanks for all of the replies. This is the info i was after. It looks like there might be a chance it might do damage so I will be steering clear.

Anybody interested in buying 8 litres of mobil 1 fully synthetic 0w-40?

Or do we think it will be ok in my mrs 1.8 MGZR? Manufacturers do recomend a 10-40 semi synthetic.

Once again thanks for the replies.