This site provides wheel and tire information for every model year by engine.Hey, sorry for confusing wording. bit ESL.
Okay I'll take a look at 235/60R18.
The shop I went to said 255/55R18 (when I told them I currently have 255/45R20) would work too. But I can't say fully trust them (it a department store tire shop).
Is there somewhere that lists recommended tire sizes by.model and year?
Also, the 255/55R18 tire will fit 8x18 wheels without a problem if you choose to go that size.