Re:  Shooters - here's the context I heard it in.  

I was travelling from Thunder Bay to Geraldton and stopped at a gas station (Esso, Can-Op, cant remember)  and while at the counter, the guy says; "That your car over there?"  Yes, I say.  "Looks like you could use a shooter" he says.  I just gave him a "huh huh, yeah" and walked out.  I didn' have a car problem and I checked my tires as I walked out to the car.  Everything was good far as I could tell.  So, still not sure - I'll ask someone this week.