Freehub getting louder

I've noticed over the last week or so that my freehub has been getting louder. It probably only has 1500 miles or on it, so I thought maybe it was 'bedding in', but I've just had the cassette replaced and now the volume has gone up again.
I'm not bothered, but is it something I should check out? The freehub is a Shimano Altus, so it's a low-end model with little or no sealing. I was thinking I might open it up a give it a regrease as a precaution, particularly as I've used spray degreaser on the cassette...
I'm not bothered, but is it something I should check out? The freehub is a Shimano Altus, so it's a low-end model with little or no sealing. I was thinking I might open it up a give it a regrease as a precaution, particularly as I've used spray degreaser on the cassette...
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Simon
retired 9.6kg Carrera Kraken
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I'm not sure what lube to use though. Park says not to use grease, but rather a 'medium weight oil', although they list their Polylube 1000 as a "required material" even though I thought that was a grease. Googling around brings up recommendations for everything from motor oil to skate bearing oil, outboard motor gearbox oil to Pedro's SynLube. I'd prefer something cheap and readily available since the freehub itself is not exactly an expensive part.
EDIT: Park says grease is not required. Others claim it can jam the pawls. I'm also concerned about whether something that thick will get to where its needed, given the limited access I'll have to the freehub's interior.
The grease will flow around quite nicely with the oil until it cools, and then will hang around in the important bits. Used to work very well in older-style engines.
On Strava.{/url}