Rule of thumb: On a normal car, it was always an unwritten rule to get the oil changed every 3,000 miles. Most car manuals actually say recommended milage for oil change is 5,000 miles. However, when you buy a brand new car, you have to break in the engine and transmission (nice and easy) for the first 1000 miles. That means no hard acceleration, no going over 80 mph, and try to utilize all 6 gears. Breaking in the engine creates metal filings inside the engine, therefore, every car buff knows to get the oil changed after the first 1,000 miles. After that it's every 3,000 miles.
Not wanting to step on any toes, but . . .
There was a time when a 3000 mile oil change interval was the norm, but for modern cars it is overkill.
Ford Model A: oil change interval of 500 miles. There was no oil filter. Single viscosity oil formulation was primitive compared to what is available today.
My other car is a 1973 Volkswagen Thing. Air-cooled Volkswagen motors have a specified oil change interval of 3000 miles. A step up from the Model A, an air-cooled VW has an oil strainer which is to be cleaned at each oil change, but no filter per se. With more than 21 million Beetles produced, it's easy to see how the 3000 mile rule of thumb was born. By comparison, a typical Detroit motor of the same vintage had a 6000 mile recommended oil and filter change.
Today, more than 35 years later, motor oil has additives that do a great job of holding dirt and crud in suspension. Synthetic oil is more resistant to breakdown and sludge formation. Filters are more sophisticated. Machining tolerances are tighter all around. Metallurgy is much advanced. All of these factors contribute to a lengthening of the oil change interval.
3000 miles is right on the money for an old Beetle. It's a waste of time and money for an LR4, IMHO.