The turbo on my GXP has lost PSIs. I used to get 21psi, now I can only get 5-6psi. Took it to an auto repair shop and they told me they would need to replace the entire turbo at a cost of about $2,000.00. My car is a 2008 but only has 30,000 miles on it. I'm not an extreme driver and seldom was the turbo induced. How could it be worn out? It is only driven six months of the year and is stored the other six months. Could this have caused a problem? Any suggestions or remedies? I'm not a mechanic so speak in layman's terms.