Every 60000 miles you must to change it
Harley recommends an oil and filter change every 5000 miles. Most riders change more frequently. I change mine every 3000 miles.
replace when bad
You can safely drive any car 3,000 miles before changing the oil/filter if it is driven normally. I drive normally and change my oil/filter every 5,000 miles. Follow your owner's manual recommendation.
For best service and durability, 30,000 miles is recommended.
If you drive normally and use full synthetic you should change your oil every 8,000 miles. You should change the filter at the same time and change your air filter every 30,000 miles.
50,000 MILES
5000
Most mechanics recommend that you get an oil change every 3000 miles. However, newer vehicles require fewer oil changes. More specifically, a volkswagen requires an oil change every 5000 miles.
That varies on driving style, ambient temperature, idle time, average speed, etc. It could be any where from 1500 miles to 6000 miles.
15 miles east 20 - 5 = 15
If you change pads regularly and drive carefully they should last the life of the car, at least 150-200, 000 miles. -I have only ever had to change discs when people before me have abused the brakes.
Depends on where you drive and the type oil you use. If you drive mostly highway and use conventional oil then change it every 6,000 miles. If you drive mostly city then change it every 3,000 miles. If you drive 50/50 city highway then every 5,000 miles is a good comprimise. If you use 100% synthetic oil then every 8,000 miles highway and 6,000 miles city driving. If you make lots of short trips that are less than 10 miles then I would recommend every 4,000 miles. Also if you drive in dusty conditions then change it more often. Always change the filter at the same time you change the oil.