i had my 5 k oil changed on friday, i went to check my oil level today (sunday) and the filler cap was jammed shut and stuck. i finally got it off and there was white sludge on the inside of my oil cap and all down the inside neck of the fill tube. i dont think 0W20 motor oil looks like that. my experience tells me that water is clouding up the oil but why or better yet how did water get into my fresh oil change? this is a 2010 tundra w/ a 5.7L i shouldnt be having problems like this. never had this w/ my old tundra. what is going on here before i ream the service dept a new one.