Purchased used GT86 and found out next day that previous owner had had vehicle remapped using Fensport Ecutek software.  It was set on Map 2 and I have since switched it to Map 4 (non-super unleaded option).
 
	1)  I assume that having used half tank of standard unleaded petrol whilst in Map 2 setting will not have caused damage/ created issues?!
 
	2)  I have no wish to bear cost of super unleaded (sorry).  Am I better of just keeping in Map 4, or go back to standard "factory setting" Map (and if the latter, how is this achieved?)
 
	3)  I presume previous owner will have voided 5 year Toyota warranty by remapping?