Can I just use any type of antifreeze? If not, what type of antifreeze do I need to buy? (I read on the Halfords website I need a 'Organic Acid Technology (OAT)' one... - my car is a Focus 1.6 2002). I looked in the manual but it just tells me about the ratios being 50/50. My brother will be emptying the coolant for me and refreshing it.
Also, what oil do I need to buy? I haven't had an oil change in the 3 years of owning the car and have no idea when it last had one before that. It does say in the manual what type, I think it was 5W/30, but someone told me the other day that it's not the one I need to use now because the car is older and because of that I now need a thicker one?
I told my brother lastnight, that I was going to call in my local Ford garage to buy the antifreeze and oil and he replied "don't be stupid, they will charge you a bomb".