Been looking on opie oils and ive found the castrol gear oil suggested in the how to guide in articals.
But its semi synthetic can fully synth be used? just i spotted this and wondered if it was any good?
http://www.opieoils.co.uk/p-850-silk...-gear-oil.aspx
and this is the castrol one
http://www.opieoils.co.uk/p-744-cast...-gear-oil.aspx
This is the full list available in 75w90, any others people have used and tested?
http://www.opieoils.co.uk/c-673-75w-90.aspx
