What Type Of Oil

hi guys i just got a 99 silverado 2500 6.0 it has 90000 on it but i never got the owners manual just wondering if i can put moble1 synthetic oil in and what grade of oil 10-30? also how much oil does it hold with a filter change seems like a stupid question but i love this truck and want to do all the right things to keep it around for awhile thanks CHROME

5-30 recommented, 6 quarts with filter change, you can use mobil 1

Go here for a copy of the owners manual...

http://www.mygmlink.com/pdf/go2content/manual/US/en/chevrolet/

Also for more info in oils checkout www.bobistheoilguy.com ... also try their forums..

:)

thanks alot GPT that manual really helps alot i had no idea it tells you when to change the oil im really liking this truck more and more now if i could just get better gas milage im thinking of a tonnoe cover

sorry i mean WGP lol