Diesels get better mileage . Even if it ' s only a few per cent , the last time I was in Europe I paid as much as $ 8 . 40 per gallon . <| sep |> There ' s a thing I did in my call center days After working at one for almost 2 years , and getting fired with zero notice , I realized they didn ' t actually care , and neither should I . My paycheck didn ' t change if I was nice or an ass , and if I got fired , I could be at another call center inside a week . So I was polite , and I helped the customers , and if they gave me lip , I just hung up while they were yelling . People expect customer service agents to be all , Sir , sir , I ' m so sorry , sir , I apologize , sir etc . When you just hang up , they ' ll either call back and be someone else ' s problem , or they might learn to be nice , or they ' ll quit doing business with your company . In no case does it affect your paycheck .