I use Hein Gericke multigrade fork oil 10W20 and am very pleased with it. Tested in winter in Holland and in summer in the Sahara.
The noise may be the steering bearings being too dry. Take apart and grease them! When was the last time you did that? If your XT also has the engine oil in the frame, the bearings get warm, and dry quickly.
Or if you have progressive springs, it could be the spring itself against the fork tube.
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Fred, XTZ660, Holland.
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Fred, XTZ660, Holland.
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