You should wait at least 5000-6000 miles before using Amsoil in ANY new gas engine and you'll never have an oil consumption problem. For a diesel engine pickup you should wait at least 10,000 miles....
My 225 Hp, Audi TT only uses about 1/4 quart every 3000 miles with the Series 2000, 0w-30...Forget this nonsense about running a PAO/ester based synthetic in a brand new motor. Redline advises against this and I agree 100% with them.
Do I care that some cars come with synthetic from the factory??? H--- NO!!! This is done mainly for MARKETING reasons and not engineering concerns for the most part.
The brand new Porsche 911 that Car and Driver used for a 40,000 mile test - in the current issue - comes with Mobil 1, 0w-40. They added 5.5 quarts of Mobil 1, 0w-40 during a 40,000 mile test (w/ 15k change intervals). This is completely unacceptable to me in an $88,000.00 vehicle!
TS