Hey rdmac, I agree with jjs & kcrnmale, do not mix you tyre pressures left to right. If the dealer is suggesting that you do this to overcome the drifting problem then it is only masking the problem.
I generally run my tyre pressures at least 5 psi above the recommended. This aids fuel economy (who really cares with a V8 anyway
) and makes for more predictable handling.
The manufacturers pick a lower pressure to improve the ride.