silkolene pro-r 10w 50
 

just put this into my classic which is modded to just over 300bhp-ish

is it ok?

10W-50 is a perfect weight for the Classic - the 10W is especially suitable if it's a STi with forged pistons. And Silk' Pro R or S is one of the best brands too.

10W-40 is fine, but the higher 50 'hot' weight protects more when engine is sustained to longer running high temps e.g. trackdays.

Also, if you have a WRX (with non-forged pistons) - or a recent new (therefore tight) engine - then I think you can get away with a thinner 'cold' 5W weight too (gets around the engine quicker on start up, when most engine wear occurs).

pro R is 15w50 R = race pro s is 10w50

Yeah, I was just about to mention that too.

OP, I assume you mean Pro S (at 10W-50)?

apologies its pro-s

it is an sti model , however its the early version1 with non forged pistons, so basically a wrx engine i think.

You have choices then. I'd say either 5W or 10W for the 'cold', and either 40 or 50 for the 'hot'. So you're fine on your 10W-50.

FTR, when I have my next change, Pro S 10W-50 is going in too! :) (changing from Millers CFS 10W-40). My WRX v.1 engine has recently been rebuilt with STi v.3/4 pistons though, and Pro S was the recommended oil from Oilman...

thanks im trying to keep min going as long as possible

but when inevitable happens ill be going forged - hoping to save up for the 2.1 option :norty:

A forged 2.1 on a MD321T (or T+) - so long as you have STi v.3-6 heads on of course - would be awesome I reckon! ;)

Don't forget to concurrently save an extra £2+k for a PPG or 6-sp, too though! :D

15 - 50 Pro R in mine .. RCM use it as standard ...

perfect for modded imprezas

10w-50 is perfect for a classic

guy
i'm just about to order from you for my 2005 impreza STI type uk. what do you recommend for it?

its done 20k miles and for general to fast road use? either silkolene or millers preferebly.

cheers
andy

5w-40 Pro S or CFS

Cheers

Just put Pro s 10W-50 in the classic.
Didn't realise it was red, thought it was hydraulic oil so double checked the label!:lol1:

Yep, reddy purple

Cheers

i gave it to my garage to fit as it was in getting other work done and they said they put it all in and was still only half way between empty and full

how much do classic imprezas hold?

The stuff recommended for my old Integrale Evo was Selenia stuff.

From memory, it was dark green like Fairy Liquid and really sticky and thin!!! lol

4.5l inc oil filter: that's when the oil's upto the topmost FULL HOLE - when cold! (not the semi-circle notch in the side, further up!)

Midway is fine. If anything it can help prevent the boost control solenoid and/or wastegate getting clogged up with oil (because of excessive fumes getting built up over time). Allegedly. ;)

cheers mate

It's a difference of 1 litre between the bottom and top FULL HOLES. ;)

Jef, see this thread for a visual lol:-

https://www.scoobynet.com/general-te...ed-my-oil.html

cheers mate just to further confuse things

whats acceptable amount of oil for my scoob to use?

its an old engine 1994, 65k miles

not reall;y noticed it using any tbh, but just wandering if the y do use abit?

I litre per 1000 miles (or 1 month - depending on frequency of use) is sort of maximum of what's 'acceptable' on older performance cars (or ones with forged pistons).

But the Impreza WRXs are not normally known for excessive oil cons. My MY93 WRX - when it had the original WRX non-forged pistons in at the c.95k mile mark - didn't use any! Even with the STi 3/4 pistons in it's still all but negligible (but it is effectively a new engine that's about a year old)

yeah mine is effectivley an early wrx engine and ive had it 5 months odd, didnt seem to have used any

i'm still confused about wether i should run 5 or 10 weight oil?

I have an 03 sti mapped to 330 ish,if the thinner oil is better then why doesnt every engine run 0/50 oil?

Good! :)

A 0W 'cold' weight is too thin for the EJ flat-4.

I believe your car's recommended oil is a 5W-40 (or 5W-30). Go with the 5W-40 for better hot running protection.

ok thanks,

so why doesnt everybody use 5 weight? i see others running 10 and even 15 weight?

10W and 15W are thicker at start up and till around, I think, 40deg C., when compared to a 5W

The Classics run this weight as the engine is worn more - simply due to its older age/mileage. This means tolerence gaps have got greater as components have worn over time/milage. So it takes a thicker oil on start up/low temp to create the same pressures (a greater a gap/volume to displace) as the thinner 5W does in a newer, tighter engine...

ok,makes sense...

so the first number ie 5w or 10w is kind of irrelevant above 40 c ?
so i want 5w because my engine is slightly newer and tighter,and 40 to give a bit better protection when hott.

sweet, thanks

You got it!

And yes, I think the 'cold' W (for Winter) number is the rating up to 40degC(?)... from which point, as you elude to, the second 30-60 number 'takes over' for the oil rating (once again, the higher the number, the more viscous oil is when hot).

Oilman will be on here soon to put us scallywags right.