learned about viscosity breakdown today

[hotrod_991]

So I was driving my new 350 down the road to gas station after adjusting my rocker arms and was just enjoying the afternoon when i big rig in my lane slowed down and I was going to miss my exit off the interstate so I kicked her down alil to get by and make my exit. well i made it but by the time I hit the exit stated hearing an unpleasent sound and smelled burnt oil so I shut it down promplty and rolled into the station. I popped the hood and has smoke comeing out throught the breather cap in my valve cover so I emediatly unbolted and pulled the cover off and inspected the rockers. everything was fine nothing broke or loose. I pulled the oil dip stick and the oil looked was extremely thin for lack of a better word. well called my dad and turns out the put realyl light weight break in oil in the motor and it was only supose to be good for about 100 miles then needed to be changed. Well I was unaware of this tho I should have known. We towed it back to the house and I am changing oil tomarrow morning. Going with a heavier oil im thinking 40 or 50 wieght witht he heat here in TX would be fine.