Oil change every 5000km?

[dnp_now]

Hello everyone.

I live in Costa Rica, where the gas is not very "high" quality. So I bring my x5 4.4 2003 to fix the A/C and the service guy tells me I should change my oil. I just changed it with them last Nov 05, and have driven only 6000km since then.

He tells me that I should change my oil every 5000km, since the quality of the gasoline here is bad. Me coming from the states, where an oil change every 10,000 to 15,000 miles is the norm. Every 5000km oil change sounds excessive, especially when they charge me over $100 for an oil change.

What do you think?