Reduced Power Malfunction/Warranty nearing end!

[CarsRmyVICE]

Hey folks,

I know this topic has been discussed somewhat thoroughly in the past but it never hurts to get advice when your bimmer is nearing the end of it's 50k coverage.

So I have had the reduced power engine malfunction come on at least a dozen times over the past two years, most recently today. My x5 50i is a may 2010 build and I got one with all the kinks this time around, after getting lucky with my 07. The first time I took it in they said nothing is coming up on the diagnostic could be anything "loose gas cap story blah blah" the next time I got a story about driving it with less than a 1/4 tank...the most recent time I was told it was "bad gas" specifically that I should stop buying 91 and use 89 because it is getting stale because nobody is buying it in this economy. I told him 91 ? I use 93 ! Additionally, I've had a coolant pump replaced in the last 6 months, after my car kept telling me my engine was overheating after start-up, which it was not. Rough starts (hot and cold) seem to be the norm as well. Occasionally the tach will bounce around like a mad man after starting it cold then eventually settle around 800.

Essentially I have been dealing with a CEL or light of some sort on the dash intermittently for the life my LEASE. I have about 7,000 miles to go before I crack 50k, with the lease ending September 1, 2013.

My obvious concern is dealing with these issues out the warranty period, or worse something major seeing as this car wants to play range rover.

Would you
A) Demand some sort of extended warranty for no cost
B) Suck it up son, there ain't much you can do about it
C) Not drive it after the winter, move on and eat the roughly 5 months or 4k in payments.

OK rant over. Maybe I am over-reacting but after leasing 3 bimmers with no issues of substance and plenty of , I am starting to get discouraged with number 4.