what was the level of the oil on the dipstick after you discovered the cap missing ? May want to get that in writing from dealer service manager in case there's an issue with the motor at a later date . That way can't say it was your fault and void the warranty . My fiances' brother had an oil change at a national brake / muffler shop and they didn't tighten the oil filter enough on his TACOMA . Luckily we noticed oil dripping from under the truck when he drove in a restaurant parking lot to say hello . Had him drive it to our house nearby and had to crawl under it at night with a work light to tighten the filter ( very tight area to work with

) . It left one heck of a mess which I had to clean up with a bunch of paper towels . Checked oil after and it had lost over 4 quarts . Fortunately I had 5 quarts to refill it . He went back to the brake shop and gave him a free oil change . If he had driven much longer may have killed it . Said he was going to travel out of that day but decided not to . A very good thing . Always check under the hood ( oil cap , oil level : too low , too high or NONE , encountered all 3

) and under the car for any leaks . Once I found a oil wrench under the hood after getting a change . Do my own oil changes now . Too many bad experiences . GOOD LUCK