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.
On average, financial analysts are much better paid than the typical worker. According to data from the U.S. Bureau of Labor Statistics (BLS), the median annual income for financial analysts across all experience levels, as of May 2012, was $76,950. Financial analysts at the big Wall Street firms often make much more, even during the first year.