I have been to Economy Lube several times and every time they always say you need an engine flush, and you need to replace your air filter, and transmission oil. The last time I was there the told the two people before me the same story. Then they tried it on me, it turns out that car had just complete an transmission oil change 5000 km before and did not need it. They have also done that with other people I have spoken to.
Bottom line if you go to economy lube, tell them you don't need anything other than an oil change. Don't buy into their sales pitch.