just had new engine built by Bret Simms Motor Sport in Dorset
for my 2003 new age wrx, Has had new all steel bottom end, cosworth pistons, oil pump etc. at great expence, as this is my first subaru coming from a Ford back ground i would like some good advise on which oil to put in it cost is not an issue. any good advice would be greatfully apreciated

 

Miller CRO mate,Competition Running-in Oil

 

30w80

 

I'm sure plenty of Scooby guys would use that if they could get hold of it.

The best oil to use for all stages of running in is the Millers CRO as that's what it's specifcally designed for.

http://www.opieoils.co.uk/p-60229-mi...ng-in-oil.aspx

I would use a 5w-40 synthetic when it's run in and you will find those through the link below.

http://www.opieoils.co.uk/c-656-5w-40.aspx

Out of those, the best ones are the Fuchs/Silkolene Pro S, Millers CFS, Motul 300V, Redline and Gulf Competition. The Motul 8100 X-Cess, Millers XFS, Fuchs Supersyn, Shell Helix and Mobil Super 3000 are good, cheaper alternatives.

Cheers

Tim

 

great. lol

 

Why a 5w40 and not any other Mr Oil man?

Ive always used it as you have recommended it but I dont know why?!

 

You can use other viscosities, for many cases 5w-40 is an ideal allround viscosity.

Cheers

Guy

 

http://www.opieoils.co.uk/pdfs/tech-...-Viscosity.pdf

Found what I needed on your site.

Ill be ringing tomorrow as I need engine, gearbox and differential oils....

 

You should be asking the engine builders this question.

 

Thats what I was thinking. Surely the guy who built the engine is the eat judge of what oil to use.

 

You'd think they'd know best, but they quite often just recommend the thickest thing they can get their hands on.

 

Another oil delivery received, thanks very much Guy/Tim @ Opie.

 

Thanks for the order and letting us know it arrived safely.

Cheers

Tim