Two weeks ago I blew a hole about 6" on the side of my block?Got 78,000 mi. and chevy is doing all they can to try not to warranty my engine! Lost two injectors at 45,000 and had small minor electrical problems up to this point. The only sign the day I blew the engine was a little smoke "white" and it was idling crappy? These same problems occured when I lost my injectors 30,000 mi. ago.Same day driving home from work "almost home" it sounded like a rod started knocking and someone threw a gernade in my engine as I was pulling off the freeway. Any ways it,s been at the dealership for 2 weeks now and they just opened it up today.They told me the oil looks like crap in the pan and since I do all my own oil changes "every damm 3,500 mi." they want every receipt oil+ filters that I bought since "04" as proof! That 100,000 no hassle warranty just went out the door! DELO-400 AND K&N OILFILTERS is there anything better I should have put in? Chevy,s on crack. So keep all your receipts or your in for a fight like mine if you have troubles with your engine!