Alright, so i changed my oil wed., used M1 5w-30(synthetic) and M1 108 oil filter, I put in 5 quarts(maybe a lil more cause i spilled some so i used a 6th bottle), and i swear its slower. It just feels sooooo slugish, and isn't pulling as hard as usual. Has anyone else ever experienced this. I know its not just in my head!

 

nope. cant say ive ever had that problem and i have the same exact car and mods as you do

 

I think I know what you mean, and its in your head bro. When I do mine, my mind wants me to think that I did something wrong so I find any little thing to blame. You think its slower, I think it's all in your head.

 

maybe, but i could swear its not pulling as hard, mid-high range

 

its actually really bad to add too much oil, its like shoving oil into too tight of an area and the internals cant move. Check your oil, sypphon some out if needed. Ive read some stories on my 350z about this, not good.

 

its fine now, it prob was just in my head, i know i didnt put to much anyways, if any maybe a pinch over 5qts

 

it might have been a bit over filled... when i do oil changes i put in 5 qts and dont think much of it.... any more and it will decrease the performance of your motor!

 

hmmm...long term test on motorweek noted a car that was overfilled during an oil change that had sluggish response. correct me if i'm wrong, but i thought g's take 4.5 quarts.

 

5qts with oil filter change. Something like 4.7qts if you dont change oil filter.

 

5 qts is the number I've seen most often. Works for me