help trying to figure out what oil grade was used
 

i got car back from dealer and went pretty good except they did not fill out what grade of oil was used... i had requested 5w20 but i dont know if that is what was used and they are closed over weekend.. the only thing i can see is a "part#00031-Pennzoil" on work order ,can any of you look at your receipt and see if everyone has this part# listed (even those who didnt get 5w20) i hope this tells me they used 5w20 the fact that they didnt write it on the windshield sticker is suspect......... thanks a lot