Is Mobil 1 5w30 really crap?
A car should always burn more synthetic than it will dino oil of the equivalent weight, synthetic works it's way pasts rings etc better than dino oil.
If he is driving it hard, he well damn sure burn a little oil, the car is designed to with low tension rings. A slight amount of blowby is normal under regular driving and slightly mroe under heavier driving. 2 quarts in 1500 miles a extreme though, either he thinks he's an indy car driver or you are getting more blowby than usual, which is just something he would have to live with unless he wants to pull the engine.
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Do you guys change your own oil? how much are you putting in and /or are you checking it right when it gets back from the oil change place? Tons of old school guys just throw in 5 quarts because that's how much every 350 they have ever owned required, but the LSx engines require more.
Some 01 Z06's did have oil burning problems. But that was for 01's, 02 thur 04 Z06's had different rings. Dealers did fix the ring problems for 01's under warranty.
Good luck..............



