I spoke with a sales rep in PR at the gas company today (not the specific gas station). He said it is virtually impossible to fill the gas tank with diesel because the diesel nozzle is larger than the gasoline nozzle and doesn't fit into the gas tank. He also said that the diesel pump is always located far away from the gas pumps and never under a canopy because trucks, which use diesel, don't fit under the canopy. He also said that diesel is way more expensive than regular gas. And, no, I did not try to put in $10 of regular gas after I supposedly put in diesel. The only fuel I put in the car was the $10 of regular gas. I only added fuel to the car that one time. I'm not sure why one person above thinks something doesn't add up in my story. We started experiencing the scraping and noise problems and inability to get uphill easily (the car would slow down to a crawl every time we had to go up an incline) as soon as we hit the highway, about 30 minutes before we added gas that one time.