5/50 or 10/60 oil ?

[psygnosis]

Hi guys

I was always told to use 5/50 but today in burtons I was told to put in 10/60.
I have the cosworth handbook and that says use 5/50.
It's a st bog standard
What do other people use and what's the benfits.

Cheers

[Rolls]

Thought the stuff Mike recomnends is either 10/50 or 15/50?
I used what he recomended TBH!

[Chris1974]

Silkolene Pro S 10W50 fully synth.

[Rolls]

Thats the kiddie!

[Dan]

I use Mobil 1 Fully Synthetic 15/50 mate, nothing else, never had a problem!

Make it 15/50 whatever you use though

[Rolls]

Odd you've said Mobile 1, as some poeple swear by it, whilst others won't touch it.. I tried it in my xr2 turbo for 1 oil change (that had a rebuilt 1.8 zvh in) and IMO it made it more noisey in the top end - haven't used it since!

[blacky]

i used the silkoline 15/50 in the nail & never had any issues

[Ben Purnell]

Silkolene Pros S for me went the 5w/40 last time but will be trying the 10w/40 next

[WENNY]

Silkolene Pro S 10W50 fully synth.

was this it has in blacky

[Agent David]

Started using Siloklene Pro S 10W/50 and have seen a marked improvement in engine noise and pressure Good stuff

[E9CRT]

i noticed an improvement when i switched to the silkolene pro S' too , much better oil pressure and defo quieter top end.

[blacky]

was this it has in blacky

ye thats the stuff i was looking for the pic i took of it to check but couldnt find it lol

[R5COS]

10/60 castrol rs or castrol edge as its now called.

[Ben Purnell]

I liked my pro s I bought 20 litres of the stuff, anyone know where I can get a 25 or 50 litre barrel from?

[Mike Rainbird]

10/60 castrol rs or castrol edge as its now called.

This is not a fully synthetic and I would not use this, as the molecules unwind when it gets hot and so 1. It expands and therefore blows out the breather if you fill it up to the top level (so appears that you are "using" and excessive amount). 2. 10w60 is too thick for high powered Cosworth engines - you shouldn't use anything higher than a 50.

I only use Silkolene Pro S 10w50 in my own car - it is the best oil out there IMO. A 5w oil is of too thin a vicosity in our climate.