http://www.hockey-reference.com/leagues/NHL_2015.html
Oilers have actually had the 16th toughest schedule so far this season based on the SOS stat (measures gf/ga of every team's competition in every game).
So basically they are right at average in terms of "toughness" of their schedule so far.
Looking at the Oilers 6 wins so far:
http://www.hockey-reference.com/leagues/NHL_2015.html
The teams they have beaten are ranked as follows under the SRS rating (takes into account goals differentials and each team's strength of schedule)
Tampa Bay 3rd
Washington 16th
Montreal 19th
NY Rangers 20th
Carolina 28th
Buffalo 30th
You can see the Oilers have only beaten one truly "good" team so far.. Tampa Bay. The other 5 wins were vs middling to downright poor teams.
Wins are wins and I'm the 1st one to say that... 2 pts in any game is a GOOD thing
but obviously this team isn't anywhere near being a strong team yet and won't be until they can consistently stay with the better teams in the league and especially the better Western conference teams.