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.
Look for plugs made from iridium or platinum for the longest life (copper has the shortest lifespan â generally about 20,000 miles). Oil Leaks: When you pull a spark plug out of the engine, the base should be relatively clean. If there is oil present, it means thereâs a leak. Not only does that mean youâll need to replace a blown seal, but it means your spark plugs will need to be changed more frequently because of contamination.