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bob uk
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Posted on Saturday, 02 May, 2015 - 09:06:   Edit PostDelete PostView Post/Check IP

This is a hoary subject because in general most engineers say no.

However some additives do work.

A useful range is the ones that soften lip seals and expand them a bit.

These additives are fussy where they work.

Steering boxes seem to like it but racks don't.

Autoboxes respond well.

I use the additive until the leak stops and 50 miles for luck. Then change the oil.

But eventually the seal will leak again.

(Message approved by david_gore)