I did all the servicing on my old 320d myself. Was rated for 20k oil changes but I did it at around 12-15k. Took it from 58k to 165k with no problems at all and the only reason I ditched the car was because the gearbox went and potential risk of the camchain going (which those engines were well known for) didn't make it a sensible investment to repair in my opinion. Also did all the servicing on my wife's old S-Max myself at every 8-10k but only because it did relatively low mileage so I was doing it yearly rather than on miles driven. Took it from 138k to 171k miles and the engine was still solid when I got rid of it.
I tend to do the oil, oil filter, pollen filter and air filter every year or 12k miles or so and brake fluid every 2 years which is what most manufacturer specifications would be anyway. If my cars were autos the gearbox oil would be getting done according to manufacturer specification too.
I've also still got a 2009 Fiesta which I have personally taken from 7k miles to 125k miles when it was my daily driver. I've still got it and it's now on nearly 150k miles so it hasn't done much over the last 4-5 years. Again I've just been sticking to the manufacturer's service intervals which is every 12k miles or 1 year for an oil change plus filters etc. Engine still seems to be solid enough. Perhaps if I had a performance petrol I'd change the oil a little more regularly but I certainly wouldn't be concerned about running it to whatever the manufacturer's specified interval is.
I tend to do the oil, oil filter, pollen filter and air filter every year or 12k miles or so and brake fluid every 2 years which is what most manufacturer specifications would be anyway. If my cars were autos the gearbox oil would be getting done according to manufacturer specification too.
I've also still got a 2009 Fiesta which I have personally taken from 7k miles to 125k miles when it was my daily driver. I've still got it and it's now on nearly 150k miles so it hasn't done much over the last 4-5 years. Again I've just been sticking to the manufacturer's service intervals which is every 12k miles or 1 year for an oil change plus filters etc. Engine still seems to be solid enough. Perhaps if I had a performance petrol I'd change the oil a little more regularly but I certainly wouldn't be concerned about running it to whatever the manufacturer's specified interval is.