500 miles driven a year and oil change

[wigner]

My X5 (4.4i 2004) has been driven about 500 miles since I made engine oil changed with Mobil 1 full synthetic 1 year ago, so 500 miles for a year!!. I am not using this X5 nowadays since I am driving another car more frequently. Today I checked the oil and the oil color is just like brand new and oil level is almost the same.

Do you think I can keep using this car without an oil change in 3~4 months?

Once I drive mine, I usually make more than 10 miles each time at least. and keep it in the garage.

Thanks for your opinions!! and I am not getting rid of it since Carmax guy offered me $3k though I paid $4.5k for some engine repairs a few years ago.
My son will use it for his first car.