Ok, there are many oil debates on these boards with regards to this brand is better than that one etc.

It would be useful to poll what viscosities people use as this is technically more important than the brand so, here goes!

Cheers
Simon

 

Hi,


I do use sunoco 10w60 engine oil and it works fantastique, very high boilling point, used in competitions.

Cheers

 

Free market research for oilman

 

My advice here is free to

Cheers
Simon

 

does it depend on the season? I use whatever the Dealer puts in the car; don't know if this changes between services in summer or winter.

 

For years in the old WRX I had I used Mobil1 5W50 from France - £18 for 4 litres from the hypermarket.

I then bought a job lot of Castrol RS 10W60 and used that in the scoob and my Westfield.

Now that its run out I've just bought some Silkolene ProS 10W50, from erm you Simon!

 

motul 300v 15w50 for me, although I have concerns about the cold starts in the recent mornings, 2 ->4degs.C on the temp display

 

5w-40 in a Standard MY99 UK Turbo - After some of this free advise.

Runs V.Nice on the Silkolene Pro S aswell.

Top man!!

 

Silkolene Pro S 10W 50 in my nearly standard MY99 Seems very happy on it!

Best wishes,

 

Same here.... and increase in general knock noise on the PFC. Plus i have hydraulic tappets and they have been very noisy for the first few seconds after start up on a couple of occassions.

Think Pro S is next.... Simon, nice price please

Tony.

 

After advice from oilman , car being serviced next week using silkolene pro s 5w/40 hope its ok!!!

 

Of course it is.

Cheers
Simon

 

 

Always used 0W-40 mobil 1 ever since I had the car, which is coming upto 8 years and 80k miles-standard car until a few months ago- now with full decat. I have no problems or any unusual noises- makes the same noises it did when new.

I will be upping the power towards 300 bhp would it be recommended to change the viscosity to say 5w-40?

Andy

 

Silko ProS 10W50, but I may change to 5W40 at the next change. Will be needing some 'round about May, Simon

 

Silkolene ProS 10-50
I get it though where I work.

 

300v 15w50

 

Pro S 5w-40

 

Mobil 1 15w50 every 3000miles.

 

Currently using Millers 5/40 full syn. Will possibly change to their 10/40 full syn. for summer. 03 STi PPP
JohnD

 

I think Chrispurvis, Like me uses the MOTORSPORT variant of the Mobil 1 which is around the 15w-40/50 mark. £35 squids in halfrauds.
Runing nearly 400bhp in mine, thrash the livin daylights out of it, no problems so far.



Andy

 

As Fuzz above ( Hi Andy, hows it going! ), over 360 horses here, was using Castrol RS 10-60, but reading Oilman's previous thread looking for a 5-40 or 10-40 oil, fully synthetic, maybe Motul 300V competition or the Silkolene Pro S stuff. Any recommendations on best suited for my classic wagon?
At a good price too.

 

Hi Vulnax ... **** your catching me up.. best do some more mods


ANdy

 

God help anyone using 0W oil!

Good for bhp figures if nothing else

MB

 

Thats correct fuzz, mobil 1 15w50 motorsport. Running a stage 1 sti 4 ( 305bhp ) with 68000 miles. No problems in the 8000miles in which I have owned it. (wheres that piece of wood!)

 

I use Mobil 1 Super S 10W40 (change every 2500 miles) but I'm considering to upgrade for 0W-50 Mobil 1 SuperSyntc. I've never seen this product before but a friend of mine told me that he bought 2 x 4lt 0W-50 Mobil1 SuperSyntc. I couldnt see this product even their website, does anyone know this product?

I'll no more use 10W40. I think it would be nice to see oil pressure values of different oils. Here my specs

Standart MY98

Cold Start idle: 100 psi
Hot idle: 30 psi
Cruise: 80 psi (@3300rpm)
WOT: 90-100 psi (@5500-7000rpm not sure)

 

Motul 300V 5W-40 Power

 

I don't think there is a problem running 0w-40 in the later model scoobs although I would say that 5w-40 would be more suitable.

Motul 300V 5w-40 is a good choice, as used by the Subaru World Rally Team.

Cheers
Simon

 

Hi Oilman (simon),

would you please explain the difference between mobil1 and motul 300v. See their respective specifications. To the layman there doesnt seem to be much difference between these two oils.

PROPERTIES of motul 300v 5w-40

Viscosity grade SAE J 300 5W-40

Density at 15°C (59°F) ASTM D1298 0.905

Viscosity at100°C (212°F) ASTM D445 13.8 mm²/s

Viscosity at 40°C (104°F) ASTM D445 80.8 mm²/s

Viscosity Index ASTM D2270 176

HTHS viscosity at150°C (302°F) ASTM D4741 4.51 mPa.s

Pour point ASTM D97 -36°C / -33°F

Flash point ASTM D92 216°C / 420°F

TBN ASTM D 2896 10.9 mg KOH/g

Typical Properties

mobil 1 0w-40

Viscosity, ASTM D 445
cSt @ 40º C 80

cSt @ 100º C 14.3

Density @15º C kg/l, ASTM D 4052 0.855

Viscosity Index, ASTM D 2270 187

Sulfated Ash, wt%, ASTM D 874 1.2

HTHS Viscosity, mPa·s @ 150ºC ASTM D 46833.6

Pour Point, ºC, ASTM D 97 -54

Flash Point, ºC, ASTM D 92 236


Andy

 

The first difference is cold crank viscosity.

Mobil1 is 0w Motul 300V is 5w.

They are both sae 40's when hot.

The main difference is the basestocks. Mobil use PAO (poly alpha olefins) and Motul use a blend which is 80% pao and 20% esters.

Esters provide an extra benefit in that they are surface active (electrostatically attracted to metal surfaces) polar in laymans terms, pao's are inert.

The best way of describing the benefits is best left to the chemists:

Esters

All jet engines are lubricated with synthetic esters, and have been for 50 years, but these expensive fluids only started to appear in petrol engine oils about 20 years ago. Thanks to their aviation origins, the types suitable for lubricants (esters also appear in perfumes; they are different!) work well from –50 degC to 200 degC, and they have a useful extra trick.

Due to their structure, ester molecules are “polar”; they stick to metal surfaces using electrostatic forces. This means that a protective layer is there at all times, even during that crucial start-up period. This helps to protect cams, gears, piston rings and valve train components, where lubrication is “boundary” rather than “hydrodynamic”, i.e. a very thin non-pressure fed film has to hold the surface apart. Even crank bearings benefit at starts, stops or when extreme shock loads upset the “hydrodynamic” film.

Silkolene PRO S 5w-40 is also a pao/ester blend.

Hope this helps.

Cheers,
Simon