Did you check the oil level in the steering box as well? A dash of Molyslip in there also works wonders!
Arwyn
I realised that I haven't checked my steering box for well over a year. Not only did I get a whole 65ml tube of Molyslip Steering Box additive in there, I also got another 50cc of 90W gear oil in too. No sign of a leak, though.
Note to self - check more frequently!
