Engineers generally regard infrequent short journeys as 'severe driving conditions' for engine oils. And thus recommend oil changes based both on time ,not just mileage.
A car that may only do an occasional short journey such as a couple of miles a week to the shops seldom fully warms up. The air /fuel mixture will be petrol rich even in summer, and especially so in colder weather. - as when using an old time 'choke'. The surfeit of petrol can dilute the oil, reducing its lubricating ability and additives. Even to the extent of 'washing' oil off moving parts.
There is also a lot of water vapour produced while the engine is cold. . This can mix with the oil making ,literally, Mayonnaise. - (You can sometimes spot mayonnaise deposits inside an oil filler cap,but dont try eating it
))
A journey long enough for the engine to get fully hot can boil off any petrol and water contamination, but short journeys can allow it to build up.
Also with a car that is not used for a long period any oil coating of moving parts can drain down, leaving moving parts unlubricated. They could even get rusty. The engine will be running unlubricated until oil pressure circulates fresh oil.
They say 80 % of engine wear occurs in the first 5 minutes. A car that does regular longish journeys largely takes care of this itself, but periodic oil changes, regardless of mileage, is intended to minimise any contamination of oil before its changed. Unless mileage is high enough to need it to be changed sooner.
Having said that your mileage pattern , a 10 mile journey every two weeks ,is neither one or the other. The distance is just enough to 'burn off' contaminants, and the period of inactivity not long enough to cause drain down problems. .
I agree with CRC. Its your choice. I too would probably leave it till next year in your circumstances.
Brake fluid is hygroscopic. It can absorb moisture over time, which can cause problems with sticking brake pistons. But low annual mileage also increases the likely hood of other brake problems such as rusted discs. So low mileage users should pay extra attention to brake performance, and get the brakes serviced if there is any suggestion of a problem such as uneven braking,binding brakes etc. (But light grinding from rusty discs may clear itself after a few hard brake applications. ). But , although you should never compromise on brake safety, a slight delay in changing fluid may not cause major problems.
