Hello guys,

Did a search and can not find a poll so though i,d start one on what oil your using/used and you findings/experience.

Currently using shell helix 5w-40 told it runs cooler than motul/silkolene

 

millers cfs 10w-40 full synth. 05 wrx with re-map

 

CSF 10w40 again.

 

catrol edge 5w 30

 

I would doubt that the shell really runs any cooler then any other quality oil. A good well branded 5w-40 or 10w-40 synthetic will be ideal.

Cheers

Guy

 

Millers CFS 5W 40

HAWK WRX Mapped by JGM

 

Mobil 1 15w 50

 

Silkolene Pro-S 10W50 in a MY99 UK Turbo running circa 270bhp

also ran this in my 200SX S14a with 283bhp, including track use and the Ring, never missed a beat

 

In a classic its a big even in a new age I would prefer a 5w40 over the 5w30 weight, many an engine has had the dreadded knocking due to the oil being too thin

Tony

 

OP if you like to extend the engine revs a lot/for extended periods, then I'd opt for a 50 hot weight. As many on here have testified, a 10W-50 is a common and sensible choice, ergo in Millers CFS or Silkolene Pro S flavours...

 

MY99 UK Turbo with Ecutek

silkolene-pro-s-10w-50 in summer
motul-300v-chrono-10w-40 in winter

Prolong engine treatment with every oil change.

 

98 sti 350bhp millers 10/60
No engine treatment as at £50 a gallon i expect it to treat my engine.

 

You definately wont need an engine treatment with something that thick in there
I would change it to a nice 10w50, even a 10w40, you will gain more power and dissipate heat better, the 60 wont do that in your car (but it will stop any oil leaking out cos it'll plug any gaps )

Tony

 

Been using 10/60 for 18 month tony car is on standard internals don 80k, the wife uses it as a daily driver and i punish it at the weekend and its never missed a beat, never even had a cel light on. ive got a set of nismo 740s and got a 20g off Andy F on sunday at knockhill just need to find a spare few hours to stick them on then i can go 30% meth and should see 400. How long will it last then ?????

 

She wont last long on the standard internals at 400bhp the oil will cause drag in your engine and wont lubricate as well at normal operating temperatures as its 50% thicker than a 40 weight oil, its not recommended by subaru for a reason you know

Tony

 

Looks like a good esther based 10-40w / 10-50w is the normal order of the day then.

Oilman i,m just goin on what one of the most formidable mappers had passed on seems to work and run fine so can,t see a case for changing at present.

 

subaru recommend 5w-30 in the book to my car, hawkeye wrx.

 

5w-30 for standard road use is fine, 5w-40 if modded or driven hard

Cheers
Guy

 

Thought you said 10w-50 oilmam

 

mobil synt s 5w40 '07 wrx ~290bhp. (btw your poll is not working, can't see it)

 

10w/50 as alternative. Silkolene is good stuff.

 

Depends on your subaru, different models/years use different oils.

Tony

 

03 STi at around 380bhp I've used most brands and weights over the years (who remembers Duckhams Q20/50 back in the '60's!)
Using either Millers CFS 5/40 or 10/40 in winter months and CFS 10/50 for the summer.

JohnD