I am about to change coolant for my '87 E30 316. I found some Valvoline coolant G-11 and G-12. First is blue, second is red. What should I use?
I found half empty bottle of coolant that is currently in the car in my boot, and I can not determine what is it. From the label:
FIAT 55523 ASTM D3306 SAE J1034 BS 6580 AFNOR R15-601
and nothing more.
I did some search on the Internet, and it looks that I should use blue G-11 coolant. Am I correct? Should I flush before I put it in?