I'd taken my vehicle to La Car Porte because it was running rough and I thought I had a problem with the transmission. As soon as they opened the hood, they immediately determined the problem -- my oil cap was missing and I'd apparently spilled enough oil to be three quarts low. They topped up my oil and gave me a new cap at no charge. But they did not clean my engine compartment of oil after doing so, which is why I give them a 4-star rating instead of 5.