Grahameo, you mentioned in an earlier post that you have used cheap ones with no problems, and that extra grease helps them.
Do you have to remove the bushes from the arms to grease them before fitting, or could you use a hypodermic needle and srynge?
Also what kind of grease do you recommend?
It's always best to remove them completely from the new arms mate, they pop out easy enough with persuasion. Grease up the rubber liberally and pop back in which is easier with the grease helping.
Personally during a full yearly service on all the Alfa's I look after I tend to unbolt the arm since I put it in the opposite way anyway its a lot quicker and easier...Then I twist the arm out towards me and remove the bushes again and re-grease them.
You don't even need to split the ball joint
It takes about 20 mins per side to do maximum
all thanks to the bolt being able to come out and not having to remove the strut to clear the bolt head....
I only use a syringe every six month on the bush's inner rubber seals still in site while still fitted every six months just to top up
Not one squeak, not one failure! Unfortunately, there is nothing you can do to prevent ball joint wear... But OE ball joints last the same time on the same roads, there is nothing special about the ball joints... Road conditions are always a primary factor on ball joint failures, Thats why the near side ball joint always seems to go quicker than the off side... Drains, potholes and more pressure on the joint on roundabouts