I bought it recently. It had been sitting for a a couple years i believe. I dont remember there being any chunks before, but i was also using a different oil pan.
I've just been using napas oil 5w30. I did an oil change as soon as i got it, then again roughly 2000-3000 miles, not km. And this time i did it at 5000 miles... The oil filter that i just changed was a napa one, the one that i first used, and just put on is the fram.
Air intake is present, secured,and everything works good there, no leaks. it was changed when i got the truck as well. Though the intake tube was cracked before (we replaced that as well)... But i dont remember chunks before either.