silkolene pro-r 10w 50
29 January 2010, 04:53 PM
#2
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).
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).
Last edited by joz8968; 29 January 2010 at 05:02 PM.
29 January 2010, 06:52 PM
#5
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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.
it is an sti model , however its the early version1 with non forged pistons, so basically a wrx engine i think.
29 January 2010, 06:58 PM
#6
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...
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...
Last edited by joz8968; 29 January 2010 at 07:05 PM.
29 January 2010, 07:08 PM
#7
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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
but when inevitable happens ill be going forged - hoping to save up for the 2.1 option
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29 January 2010, 07:26 PM
#8
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!
Don't forget to concurrently save an extra £2+k for a PPG or 6-sp, too though!
Last edited by joz8968; 29 January 2010 at 07:36 PM.
29 January 2010, 08:49 PM
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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
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
29 January 2010, 09:35 PM
#15
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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?
how much do classic imprezas hold?
29 January 2010, 09:40 PM
#17
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.
Last edited by joz8968; 29 January 2010 at 09:43 PM.
29 January 2010, 11:16 PM
#21
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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?
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?
29 January 2010, 11:24 PM
#22
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)
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)
Last edited by joz8968; 29 January 2010 at 11:27 PM.
29 January 2010, 11:45 PM
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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?
I have an 03 sti mapped to 330 ish,if the thinner oil is better then why doesnt every engine run 0/50 oil?
30 January 2010, 12:18 AM
#28
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...
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...
Last edited by joz8968; 30 January 2010 at 01:55 AM.
30 January 2010, 12:51 AM
#29
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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
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
30 January 2010, 01:07 AM
#30
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.
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.
Last edited by joz8968; 30 January 2010 at 01:14 AM.