Nobody has asked what your hot oil pressure is yet.
I don't trust dash gauges for some circumstances but if its in the normal range and moves normally for various temps and RPMs then oil viscosity is not your problem.
If your oil pressure is normal, You could try a 20w50 or Lucas... but if it makes a difference in your noise then you definitely have a problem that will fail eventually. Its a single component that is failing, not 'just tired' like what makes most people switch to thicker oil.
Edit, if you want the best... Amsoil makes a 5w50 oil, that could be the best of both worlds for you. albeit expensive.
I don't trust dash gauges for some circumstances but if its in the normal range and moves normally for various temps and RPMs then oil viscosity is not your problem.
If your oil pressure is normal, You could try a 20w50 or Lucas... but if it makes a difference in your noise then you definitely have a problem that will fail eventually. Its a single component that is failing, not 'just tired' like what makes most people switch to thicker oil.
Edit, if you want the best... Amsoil makes a 5w50 oil, that could be the best of both worlds for you. albeit expensive.
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