Castrol GTX

[Lewis's Friend]

Hi All

I do apologise for starting another topic that has been done to death over the years (as google has shown me with a quick search)!

I'm about to service the S and have been looking at alternative engine oils. The last two years I have used Silkolene Pro S 10W-50. It has been fine - good oil pressure etc. However, it costs...

This time round I have found various people over the years recommend Castrol GTX. On EuroCarParts I can GTX 15W-40 for almost half the price of my previous choice. Does this sound like a reasoncable route to go down?

Also, this is part-synthetic. Others speak about full-synthetic GTX. What is the difference can I ask (accept the rice)!?

As always, peoples help is greatly appreciated.

[Lewis's Friend]

mk1fan said:

I think you need to be careful with using 'new' oils in the Cologne V6s and Rover V8s as they need the additives of the 'old' oils to go along side the manufacturing tollerances of the engines. I use Halfords Classic oil. Not that expensive.

Thanks for that - do you know what grade that is, or is it a generic 'classic oil'?

[Lewis's Friend]

Thanks for all the posts. It is always appreciated, and I know I can rely on people's patience on this forum!

I think I'm going to go down the Valvoline route. A decent alternative to what I've been using, and a reasonable saving too. Perfect...