the oil will not break down as quickly but it will still break down and the filter only can catch so much before it's 'full' and all the dirty oil is just passing through the bypass valve. personally, after a lot of my own research, i would recommend changing conventional oil every 3k miles and synthetic every ~6k.
People with economics degrees will typically make around $70,000 to $115,000 at their peak. If you have a finance degree, then you can expect around $65,000 to $170,000. At the same time, this entirely depends on your position. For example, some less motivated finance degree holders work for years as bank tellers.
For example the median expected annual pay for a typical Professor - Economics in the United States is $109,192, so 50% of the people who perform the job of Professor - Economics in the United States are expected to make less than $109,192. Percentile. Location. 10th Percentile Professor - Economics Salary.