more questions...
whats recommended oil for my car? temp it starting to go below 40 degrees F and i noticed my engine tapping for a few seconds when i start it

i found this black stuff like a graphite or plastic not sure exactly in this one rubber line coming from my air pump...is that bad?...and the other rubber fitting goin into my engine was split so i removed it,is that also bad?

i also have a surging idle so i unplugged my IAC...whats the cheaper routes to fixing a high idle? cuz now i have rough starts due to my IAC being unplugged

my wiper comes on every once and a while on its own..i noticed that if the handle is turned backwards it makes it come on..do i have a bad connection? do i need a new handle?

my auxilary fans NEVER come on..even when the temp climbs and when i have the AC on...and i know they work cuz i tested them by runnin a wire from my batt to them..so whats bad some type or sensor?

i got lots mroe questions i just need to remember them all