[Barry_R]

Not at all comparable. Factory builds do not use the same honing techniques or machines as we do in the aftermarket. In addition there is a fair chance that they are not started on gasoline for the first spin - CNG, propane or spun up with an electric motor drive to verify oil pressure and such before install.

When I ran Speed-Pro we regularly had well established shops that tried break-in with synthetic and experienced ring sealing troubles that they did not have with normal oil. Back to dino and the problems simply went away - no accident and enough frequency to state that it was not coincidental. Synthetic on first fire is simply a risk taken without any reward. Even if the odds are 90-10 its too easy to eliminate the variable.

Oil burning can come from a lot of places - many of which will never show up in any performance oriented testing - leakdown and compression checks won't show you a thing.