Originally Posted by airsmith
Installer decided to change the oil and filter and switched to synthetic, MOBIL1 . Took a liitle over 4.5 Quarts. Dipstick at Full. Told me to keep monitoring the consumption and if it continues at the same rate we will contact GM at 1000 miles and open a case under the warranty.
As a point of reference for you, my 350 after being rebuilt used less than a quart for the entire first 1000 miles even with an oil plan leak.
I say you have a problem somewhere. Maybe some rings installed upside down?