F.A.O. MARK.

[stijoy]

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

[danr55]

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

[stijoy]

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

that certainely answered my questions
i realise that

[marky mark]

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

[stijoy]

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

[marky mark]

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

[stijoy]

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

[WR 1mposter]

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

[stijoy]

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

[WR 1mposter]

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 ...

[stijoy]

ok

[WR 1mposter]

Mick its 15/50 sikolene

but will go back to 5/40 for the winter