Silverado 5.3L is now rated at 380HP..
 

..on E85

380hp @ 5600
(E85 – SAE certified)

416 lb-ft @ 4100
(E85 – SAE certified)

2014 Silverado 1500 Regular Cab Specifications

it also uses 8.5 quarts of synthetic 0w20 :eek:

Anyone know why the 4.3L wouldn't use the same oil as the 5.3L & 6.2L? (5w30 vs. 0w20) Same engine technology.

Re: Silverado 5.3L is now rated at 380HP..
 

I use 10w30 royal purple in anything other than break in then straight 30 rotella

my 2500 crew cab 8.1 has 309k miles on factory drive train 10w30 rp after the first 6k miles

177k on my 03 Tahoe 5.3