The way I see it, frequent oil changes will NEVER hurt your engine. Infrequent oil changes could POSSIBLY hurt your engine. I enjoy my vehicles and plan on keeping them a long time. I change my Amsoil synthetic every 3K miles and I don't mind the cost. It's like an insurance policy.

Here's a good way to see the difference. Remove the oil cap form any of my engines and peer inside with a flashlight. You can see nice and shiny metal with a nice glossy oil coating. That's the way it should be....... Not all varnished up or black and gooy.
Adam

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Current Stable:
01 ML55 AMG
92 500E (a few mods)
87 300E (lots of mods)
00 Chevy 3500HD Diesel Box Truck
68 18' Donzi Marine
06 GT i-Drive7 1.0 Mountain Bike (with GPS!)

PREVIOUSLY OWNED:83 300SD, 87 420SEL, 88 420SEL, 90 420SEL, 86 560SEL, 86 190E 2.3-16V AMG, 94 E320