speed.46

will this oil be ok for a 94 wrx ,280bhp?

TonyBurns

iTrader: (3)

240ps (237bhp) and your better off with a 10w40 or 50, 60 is a little too thick when hot.

Tony

speed.46

so you think its no good

Aaron1978

iTrader: (12)

nothing wrong with 10w 60, i use this in mine.

Aaron

P.s people get a bit hung up on here with oils and most of the ones people use will be fine.

greatgonzo

iTrader: (1)

nothing wrong with it mate, properly to good and you might be spending to much money on it. As said above most of the oils are fine because they exceed the requirements of the car.

TonyBurns

iTrader: (3)

Lets just say its not on the recommended list by subaru
Use it at your own risk basically, especially on the older cars, it is TOO THICK at hot temps.

Tony

Guinness

iTrader: (1)

I've been using it for 10 years now with no issues(formally Castrol rs)...1st had it in my STI 3 Type R from standard through various stages of tune up to 400 bhp,now use it in my P1 which is currently running 520bhp..If i changed to any other brand and had a problem i'd be gutted......Alan...

TonyBurns

iTrader: (3)

Like i said, run it at your own risk, its TOO THICK hence why its not recommended, its good for motorsport but not for road use, even then I would not go above a 50 rated oil, ask an engine builder what oil is most common in engines that have gone bang, you will find its either 5 30 or 10 60, not the standard 10 40

Have a look here anyway
https://www.opieoils.co.uk/products-...e-oils#results


Tony

speed.46

thanks for that

TonyBurns

iTrader: (3)

if you look at this (well im a bit bias with motul fully synthetic ) but these show you who uses it and what grades they use

Motul Engine Oil

Tony

Aaron1978

iTrader: (12)

Tony,

Rich at RE Motorsport uses it as it is him that services my car, and he himself used to work for subaru. Also Carnetix use this. What subaru reccomend and whats best for your car are two different things. From geometry settings to tyre pressure to repeated failing parts they use (struts) they don't always know best do they? Ok i know oil is different but you get my point. As the guy above pointed out 10 years with no problems. I'm not saying its the best oil but its still a very good oil as is most oils. If it wasn't any good i'm sure people like Rich for example wouldn't use it period. We could argue about this for eternity. Your saying its bad for your engine which it quite clearly isn't.

Aaron

TonyBurns

iTrader: (3)

What im saying is that its too thick and run it at your own risk, also that more cars running oil outside of the specified range have more engine failures, especially ones with older oil pumps that have to work harder to get a thicker oil around the engine (plus its not recommended by subaru and never has been )
It doesnt mean its a bad oil, i agree on that, what it means it that its not suitable for the engine in that state of tune and the OP would be better going for an oil which will cope with the day to day running, ie a 10w40 or a 5w40 oil

I could also add that a certain garage (near oldham) that I only used once back in 2000/2001 before i found Prosport put in my classic when i asked for fully synthetic oil (and they were a dealership!) and it wasnt recommended! (too thin!) doesnt mean they were good either (though Prosport is damn good )

Tony

PS, the struts are made by KYB and not subaru

Aaron1978

iTrader: (12)

I never said they made the struts, i know there made by KYB only that they use them just the same as they use oil not make it My point there was that they kept on using a part they knew was failing on a regular basis. As for the older oil pump working harder surely that would be the oil pumps fault if that did indeed fail for being old and worn? as it gets older should you use thinner and thinner oil?.

We could argue about this all day, and my day has taken a turn for the worse already as my Bird has just put a recorded episode of Eastenders on

Aaron

TonyBurns

iTrader: (3)

If a pump works harder than it should it will wear quicker but overworking something old makes it break normally hence you dont over do it
Try this at home if you want

Get a straw, suck water through it, do the same with orange juice with bits in, then with a thick milkshake, which one makes you work harder?
Now imagine that in your engine

Anyway, i shall leave you to be "punished" by your missus with eastenders or tell her MOTD2 is on and see what she says

Tony

speed.46

i went and changed it ,i have put castrol 10 40 in now,so thanks to you all

sponners

iTrader: (4)

for majority of people on here
10/60
10/40

joz8968

iTrader: (13)

OP, read through this thread first before making your mind up - it may make you think twice:-

https://www.scoobynet.com/technical-...-answered.html

For a Classic, I'd stick to 5, 10 or 15W - preferably 10W or 15W - for the cold viscosity, and either 40 or 50 for the hot.

I think a good choice for an old, high milage Classic engine would be Silkolene Pro S 15W-50