I work for a university where students are often approved for a Sallie Mae loan, but usually only for a small amount (less than $2,000). When the amount gets higher, then factors like income and the length of your credit history will matter more.
Getting Started. Fouled, damaged, or worn out spark plugs can lead to a variety of engine problems, such as misfires, hard starts, increased emissions, and poor fuel economy. For most vehicles, you should replace your spark plugs every 30,000 miles (consult your owner's manual for your specific interval). It is also recommended that you replace your spark plugs wires at the same time, or you may still experience misfires or other problems.
If you get a check engine light along with slight jolts while accelerating, the spark plugs could be to blame. This is a quick, easy and inexpensive fix. To avoid the problem, replace spark plugs on older cars every 25,000 to 35,000 miles. Replace spark plugs on newer cars roughly every 100,000 miles. Although it's natural to look at a check engine light with dread, remember that it's there for a reason. Ignore it at your own peril.