IainMilford

iTrader: (15)

As above, currently running Pro S 10/50 in my car, some of my friends are running Pro R I'm just interested to know what the difference is, if there is a better one etc.

My car is a modded newage wrx to around 330bhp, 55K, weekend car and a few track days a year.

Thanks
Iain

MarkCSC

I "think" the Pro R is designed for racing and hasn't got approvals for road use. Doubt it would do any harm but mabye overkill for the road. I'm sure Opie Oils would be able to clarify.

IainMilford

iTrader: (15)

I noticed on track my mate using pro r his temps were a bit lower than me with the pro s, we both have oil coolers, could be to do with the fact that I need to cut away a bit more plastic to get better air flow but wondered if the different oils had anything to do with it. Looks like the pro r is more designed for track use then.

joz8968

iTrader: (13)

Isn't S 10W-40 and 10W-50?

And R 15W-50?

Which, as above, eludes to the fact that R is more suited for the track and 'constant' (lol) fast road/hooning head-off use, etc...

IainMilford

iTrader: (15)

Think I'll try the pro r next time