I took my car to get an inspection and an oil change 2 days ago and ever since then,I noticed the oil pressure while driving is around 50 or so.I rememebr it use to always be around 60 driving.Is this anything to worry about? Do oil weights matter? Perhaps they used a diffrent weight of oil.

 

Normal for me is 40 while while driving and down to 20 when idling so I wouldn't worry to much about as long as it doesn't fluctuate alot out of the ordinary.

I'm not sure about the weights, I put in a slightly thicker grade than 5w30 during the hotter summer months, otherwise I just stick with the 5w30

 

10w 40 in the summer months for me

and my oil pressure goes up a little bit when the motor's cold, but then gets close to normal when all is warm (though it still sits about 5psi above what it does in the winter)

i use the recommended 5w30 in the winter

maybe you had heavier oil in it before

or your oil filter might have been clogged up

dirty *** oil will do it too

could be a number of things, I wouldn't worry about it as long as it doesn't get too low, but keep an eye out as an afterthought.

 

That pressure is just about right.
Just keep an eye on the fluid level, that's all should be your concern.
PS as engines age, pressure goes one way or the other. Yours is still "consistent".