there is one in kilbride just out past hollystown, in closer to dublin there is one in baldoyle, santry and richmond rd. the one in swords is closed down, or atleast it was about a week ago.
check this out http://www.maxol.ie/general-content/e5-stations.html
There is another one just beside artane castle and it is usually about 2-3 cents a litre cheaper than baldoyle. I only found out the other day and wont return to baldoyle again.