Boredom is one reason. Gas isn't really the main driver, just a nice to have.I think feasibility is low. Reasons are the starter and other components are beefed up to put up with higher demands and there would be quite a bit of coding involved.
Most people who have ASS hate it, surprised anyone would look to retrofit it. It's kinda like the runflat and dipstick and spare tire thing in terms of popularity in the US. We have ASS on the 4 series and it does not bother me, then again I don't drive the car all that much. Only time it gets a bit confused is when coming to stop for a brief second then picking up again, there are times when you expect it to stop the engine and it doesn't (like in stop and go actually), but other than that it is fairly unobtrusive.
Why are you looking to do this? Given X6M surely it can't be a fuel economy concern.
From what I understand the ASS system was introduced around 2010 and was an option on most vehicles by 2011. This seems to indicate that the engines were already setup to accommodate it and that its a likely an additional module, switch and some coding.Engines built for Automatic Start Stop service have big end bearings coated with polymer lubricant for frequent operation before oil lubrication is available. BMW's polymer lubricant is called IROX, apparently by GLYCO / Federal Mogul Powertrains.
Manufactures are running out of ways to reduce emissions and increase mileage. Sure CAFE is good for the tail pipe but i'll be interesting to see how battery costs will impact maintenance once a car is 8-10 years old. I hear Prius batteries cost 5k, with the X5 plugin more, and topping off at the Tesla.Maybe CAFE requirements
Not being able to disable it is mind blowing on a car one purchased. Like it's the law.Only think more annoying that auto stop/start is a car in which it cannot be disabled....
IMO it helps car mfg meet CAFE at the expense of the owners past 50, 100k when components die
+1 . . . couldn't agree more . . . one of the first things I look for on a rental . . . just after setting the seats and mirrors is how to disable this stupid feature . . . yes, before I figure out the AC and radio controls . . .Only think more annoying that auto stop/start is a car in which it cannot be disabled....