Originally Posted by garagebandking82
Hello all,
New to the forum...happy to be a xfire owner...always wanted one...and yes now I'm a clean freak when it comes to the vehicle....
On topic...I moved onto the xfire after owning a Mercedes...which took premium gas...since I enjoy keeping tabs on the tech aspects of my cars I was a member of mercedesshop forum and this question was a common one...MB engines have knock sensors and other electronics to compensate for lower octane fuel so as to avoid damaging your engine...this also usually ends up decreasing performance (albeit usually unnoticeable) as well as lowering your fuel economy a bit...which often negates any savings you may have incurred...
This has been mentioned before on the forum. It appears your answer is spot on. So if you just want the looks and are not that concerned with performance, regular should work fine.
Unless the difference gets huge (around a dollar a gallon) I will stick with premium. While I don't hot rod all the time, every so often (quite often) the little beastly lets me know it would like to sprint. I can't help it, I just have to respond with a gentle jab to the throttle. I have never owned a vehicle that felt so integrated with the driver and gives such an overall wonderfully effortless performance driving experience.
