WR1 Owners Club

just another question on oil
earlier in the year we went down to cornwall, we called in at opie oils, as i wanted to get some more 10-40 silkolene pro s,
i ws informed by the main man that i should really be using 5-40 instead
when i was going round bruntingthorpe in aug, i noticed that my oil temp was between 115 and 118
now as i am going to be going to the spa,ring trip next year, am a little bit concerened that this might not be the right one
would it be better to go back to 10-40, or would you reccomend something that is good for every day driving, and for when you get on these circuits
thanks

you'll be changing the oil again before spa pops...

danr55 wrote:you'll be changing the oil again before spa pops...

that certainely answered my questions
i realise that

the 5/40 is subarus recommendation for a new age standard car under normal driving conditions. For the classic its 10/40 because the bore/piston clearance is greater.

If you are using the car outside of standard operating parameters and achieving oil temps that high you would be advised to go to at least a 10/40. This will still be ok at winter cold starts as well.

So if you cant be bum to change before and after a track day you want min 10/40.

I was getting 110-115 at Brunters on 15/50 and a new age bottom end but obviously i am making more heat than you with 400 BHP+

For your information, i suffered a big end failure at 118 degrees

so you would say go back to the 10-40 then mark
will it be ok to switch back to 10-40 after using 5-40

If you are using it on track then yes put 10/40 in. If you dont (and your car is standard) stick with 5/40

It has no ill affects swapping between grades.

If you want to be a fanny - put in 50/50 of both, believe it not you get 7.5/40! make sure they are the same make and type of oil though

i think i will go back to the 10-40, next aug then

RCM put "pro r" in ours Mick, slely for "the ring /spa trip"
I think its 15/50

Also oil temp never went over 110
if I remember right

but will revert back to 5/40

WR 1mpostor (aka number 1 moderator) wrote:RCM put "pro r" in ours Mick, slely for "the ring /spa trip"
I think its 15/50

Also oil temp never went over 110
if I remember right

but will revert back to 5/40

so 15-50 for track use, 5-40 for every day driving

stijoy wrote:

WR 1mpostor (aka number 1 moderator) wrote:RCM put "pro r" in ours Mick, slely for "the ring /spa trip"
I think its 15/50

Also oil temp never went over 110
if I remember right

but will revert back to 5/40

so 15-50 for track use, 5-40 for every day driving

Pretty certain it's 15/50...
I did purchase two cans and one is in the boot
of the car ......i will let you know tomoz

as its cold outside now ...

ok

Mick its 15/50 sikolene

but will go back to 5/40 for the winter