Quick question here!

I bought a 02 wrx from a Mazda dealer with 112k and now it's at 117k. I bought it in January in Wisconsin so the weather has been very cold this winter.

Anyways since it's warming up I've noticed when my car gets up to operating temp 2nd, 3rd, 4th begin to notch into gear. And grind very little into third. When the car is cold the car shifts like butter and I love how it feels! I bought some Subaru extra s that will be here Tuesday that I will be putting in. So do you think the dealer put in some fluid that's meant for the colder weather or just put in there fluid?

I'm hoping this will eliminate all the grinding/ notch feeling while shifting!

Thanks in advance to everyone!