Castrol R Range - Group III ?

[Andrew]

Is the Aus Castrol R range of oils (0W-40, 5W-30, 10W-60) made from Group III basestocks ?

My father uses 0W-40 in his HSV Clubsport 5.0L and he pays a fortune for it. I am interested if they are Group III or IV based.

http://www.castrol.com.au/products/formular/

http://www.castrol.com.au/products/products_engineoils.jsp

They say that they are "full synthetic"

Thanks

[ August 12, 2003, 01:15 AM: Message edited by: Andrew ]

 

[sprintman]

5W30 is, 0W40, 10W60 PAO. 25W50 not sure. I asked Castrol tech...s

 

[Andrew]

Thanks.

The 25W-50 is the same as the old GP50 and is listed as a mineral oil. Probably Gp II since it is inexpensive compared to the others