This is my first post, so I apologize if I am being a repetitive noob! I am definitely not a gear head (yet) and I was just looking for some opinions on the fluids I decided to use. I recently bought a 2006 WRX and I have had zero issues with the car. The dealer did not have an information on the previous maintenance, so I decided I would "baseline" the car just to be safe. After reading endless posts and threads I have decided to use Redline products. I know many people prefer Royal Purple over Redline, but my friend (mechanical engineer) told me he had great results with Redline products. So, I decided to do some maintenance and wanted to see what everyone's opinion was on my setup.
Transmission: Redline 75w90 NS
Rear Differential: Redlline 75w90
Engine: Redline 5w30
Oil Filter: Subaru OEM Oil Filter
I live in Maine, and the temperatures during the winter can drop below -10F. The research I have done led me to believe that Redline 5w30 would be the best choice for engine oil. I chose the Redline 75w90 NS for the transmission because I heard the lack of friction modificators was better to use in the transmission than other Redline fluids (Shockproof Lightweight) and that it meets the GL-5 requirement. It also seems that most people feel that the Redline 75w90 (non-NS) is better for the rear differential because it does have friction modificators. Lastly, most people feel the Subaru OEM oil filter is the best filter to use on the car (thoughts). I have a Torx 70 bit, siphon, and anti-seize. Anything else that I am missing (besides standard tools)?
I was hoping people could provide opinions on if my proposed plan is a good idea/bad idea. I know the opinions will range, but I am looking for solid facts as to why using all Redline would be a bad idea. So far, I haven't found anything that says it is.
Again, thanks for the patience and understanding that I am new to the world of maintaining vehicles. Either way, is it sad that I am super excited to change my fluids...?
Thanks in advance!