Timrå started best and quickly created two opportunities for games in powerplay.
Oskarshamn's goalkeeper Tim Juel fought well in his box, but was without a chance when Timrå's Ty Rattie got hold of the puck.
The home team played after a hesitant start to the match.
Dale Weise's equalizer, 1.01 into the second period, was just the beginning of the team's productivity in the attacking zone.
Admittedly, Joseph Laleggia pushed Timrå to a new lead, but then it was just about Oskarshamn.
"No good period"
Timrå was run over, lost the shot statistics of the period 7-22 and conceded three quick goals.
Patrik Karlkvist, Daniel Muzito-Bagenda and Cameron Brace all scored before the period was over.
-Fun to get out in others and hang some bags there, that's how hockey should be.
We win duels and dare to have long attacks, said Oskarshamn's national team player Fredrik Olofsson in a break interview in C More.
"Not a good period, they are washing over us," Timrå's team captain Tim Erixon told C More.
Boyce-Rotewall received consolation goals
The third period was goalless for a long time.
Timrå was again awarded a match in powerplay, but failed to take advantage of that chance.
The match was decided when Cameron Brace came free and worked his way in 5-2 to Oskarshamn.
Timrå's Jeremy Boyce-Rotewall admittedly reduced his team's disadvantage to two goals, but when the team took out its goalkeeper Jacob Johansson, Joakim Thelin determined Oskarshamn's victory numbers.
According to the game schedule, Oskarshamn would go on SHL Christmas break after this match.
That will not be the case - on Monday night, the team will be forced to make a new trip to Linköping to complete the match that was canceled on Thursday due to ice problems.
For Timrå's players, nine match-free days await before it is time to take on Malmö on away ice.