Originally Posted by gurnE
Ford don't spend thousand of pounds on R& D, durability tests etc to then go ahead and fit a battery that isn't capable of it's task!
I usually go for the heavy duty option when I'm replacing the battery as it's only a couple of quid more but there's no point unless your battery is fooked imo
Like he said, if your cars starting ok and everythings working then why change it? If you do, the ford "silver top" ones are good, got one on my car.