8G RAM March 2009 15-inch MacBook Pro/2.66GHz?

I have a 15-inch MacBook Pro Core 2 Duo/2.66GHz. The specs on this machine was added in March 2009. For reference, here is an article on my machine:

15-inch MacBook Pro Core 2 Duo/2.66GHz Review | Laptop | Macworld

I know apple says this machine can use 4G max for RAM. But I've read where the true maximum on some machines is higher than what Apple says. Is my machine a candidate for 6G or maybe 8G "unofficially"?

Supposedly, it should support up to 8GB. Here's some benchmark testing...

OtherWorldComputing.com

Thanks Jaygray!! This is just wanted I needed to see.

My machine on the chart is the MacBook Pro 15" (Early 2009 - "Unibody")
2.66 GHz Core 2 Duo (6MB L2 Cache). And here are the test results:

2048 MB (2x 1024) - Not Tested
4096 MB (2x 2048) - 301.00
6144 MB (4096 + 2048) - 284.12
8192 MB (2x 4096) - 274.53

I currently have the 4 GB configuration. There is not much difference between the 4 and 6? The difference between the 4 and 8 is about 9%.

Is it worth it for me to try the 8G? I'm pretty sure doing so would void my warranty, right? Hmmm what should I do?

Doing self RAM and Hard Drive upgrades do not void your warranty, anything beyond will.

I understand that doing self RAM does not void the warranty, but if I exceed the recommended RAM amount, wouldn't that void the warranty?

No it wouldn't, you can put as much RAM as your Mac (and wallet) can handle.