bmr_beast 0 Report post Posted May 20, 2018 Hi, my E60 M5 owners manual recommends 98 RON unleaded fuel. I usually fill up with 95, but found a gas station around the corner offering 98 at a reduced price cheaper than 95 even. Does contain 10% ethanol. Is that a problem? Quote Share this post Link to post Share on other sites
aja540i 1906 Report post Posted May 21, 2018 E10 should be ok, but if you want the full performance you need to use the good stuff. I don't want to sound like an a55h0le but if you can't afford to run your M5 on 98, you can't really afford to own an M5. 5 1 Quote Share this post Link to post Share on other sites
GorGasm 563 Report post Posted May 22, 2018 (edited) The line is a bit blurrier than that with regard to different versions of 98. Why would you use a fuel that is more expensive for no benefit? I personally don't use E10, as my local servo is Mobil with 98 (which might actually have some E in it as well), but I wouldn't have any concern using Gull E10 in my M5. 95 on the other hand I would avoid. BP I have found have silly mark ups on their premium fuels, usually 10c higher than the competition. Edited May 22, 2018 by GorGasm Quote Share this post Link to post Share on other sites
