Between 5,00 and 6,000 miles, Castrol Syntec 0W-40 or 10W-40 depending on the time of year with Hengst filter kit. Can of LubroMoly Jectron halfway between oil changes along with giving the vehicle a once over to make sure everything is in proper order.

For me the reasoning is fairly simple. I'd rather spend $50-$60 on an oil change every 5,000 miles than try and stretch it. in particular with the N62. I work at a shop while I am home between assignments and have worked on a lot of N62s in the past couple years. The ones with failing valve stem seals are the ones that also have sludge in them when we pull it apart from using cheap oil or failure to keep up with oil changes. The ones that are still running well are the ones we see every 5,000 miles for an oil change with a quality oil. Guy I work for has a 4.8is and both myself and his brother have 4.4i's all N62 motors, each of them have over 150k on the clock and they are all still going strong, no smoking, knock on wood.

I count on my vehicles to be there when I need them so I take care of them like they should be. I drove my X5 from Atlanta Georgia to Wichita Kansas to Ft. Worth Texas and then back to Atlanta. The only thing that went wrong was the Final Stage Resistor, over 150k on my X5 and it was the original resistor, common failure item on the E53 as well as other BMWs. Sorry if I am rambling but I tell all our customers this, generally speaking when it comes to BMWs they can be pricey to maintain, but if you take care of them they will treat you well in return and also put a smile on your face.

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2004 BMW X5 4.4i-Sports Package-Premium-140,000 Miles