Owned a 2013 LCI M5 for 10 months,used as a daily driver.regarding reliability;had both headlights replaced due to very heavy condensation,front calliper replaced due to seized bleed screw,these replaced under warranty,approx £1,000 for each of these if not in warranty.At moment showing 23.4 average mpg,I don’t drive it mad all the time.Accelaration can be brutal,you have to plan ahead,you can feel your internal organs moving backwards,it doesn’t stop accelerating,it’s awesome to be honest.Used 4 lts of oil,all 4 tyres replaced,but that’s just normal wear and tear.Black leather will mark really easily so be careful.Effortless motorway cruising,have seen 32mpg,like to tootal along knowing what the car is capable of if the mood takes me.Yes I know it’s not going to be cheap to run,but it’s a 560hp car,it never will be.Will look into buying warranty after 12 months.Do I regret buying it,not one bit,it’s an awesome experience owning it.