Interestingly, looking on morgan-motor.com, the webpage on “Morgan Works Servicing” lists 3 levels of servicing for traditional models fixed price servicing, but although there is a reference to “oil and fluid checks” I cannot see any mention of actually changing the oils (apart from engine oil, of course.)
There is then a price list for traditionals and as you scroll further down the page, they then list requirements for CX chassis cars, in a similar vein. However, prior to the price list for those cars, there is a section headed “additional items”, and there, amongst other things like plugs, brake fluid, coolant, etc. it states 60,000 miles or 5 years for gearbox and diff oil changes!
Whether that also applies to trad models is unclear, as the location of this info on the page suggests it only applies to CX platforms.
Very confusing, but we come to expect this with Morgan!
( and check out those prices...+vat remember! Ouch!)