maintance has been done. I was looking at Rx7's before i bought my Z. I wouldnt trade my Z for the Rx7 because of the reliability. I have no fear driving my Z everyday, and the quality of the Z is so much better. The Z interior makes the 7's look & feel cheap. Not to mention the 7 drinks oil by design...and always have an engine fund ready. BUT rotory engines are cheaper to rebuild than the VG's.