I have a 2009 MacBook Pro (macbook pro 5.4) with Core 2 duo 2.53ghz 4GB RAM with 256 HDD. I upgraded the RAM and switched to SSD. Here are the specs:
Crucial M4 CT256M4SSD2 2.5" 256GB SATA III MLC Internal Solid State Drive (SSD)
Crucial 8GB (2 x 4GB) 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Laptop Memory Model CT2KIT51264BC1067
My problem is that after upgrading my laptop drains significantly more battery while on sleep. Like 15% per day, before upgrade it drained like 1-2% per day on sleep.
I'm on Mavericks but with upgrades, so not a fresh install, I also enabled the trim support for the SSD with a third party app. I tried SMC reset at some point as well. I have the latest firmware update.