How expensive is a high mileage //M to maintain?

[Gustavo7]

Plus if you are concerned about rod bearing failure, have an oil sample taken regularly and get it analyzed by a lab. 25 quid it costs.

I've just started to do so, it will enable me to build a history on the content of iron, copper, and lead. If these rise I know I know something is cooking.

Where do you get your oil analysed mate.?

From these guys: http://www.theoillab.co.uk