Hi,i saw wolf's head brand 15w40 diesel rated motor oil in a car parts store the other day,and i was wondering if it was a suitable oil for short 3000 to 6000 mile hdeo engine oil change intervals. I was wondering if anyone has a voa of this oil,and it's additive packages because i am considering purchasing two cases at $1.45 a quart. Thank you in advance for all the advice
-Pete
-Pete