My suggestion would be; you dont need any spacers or 195 tyres.....
A quality one level ( churi ) up flexible spring ( from Shah jee in Karachi or any reputable suspension guy) and 185 - 65 - 15 tyres would serve both purpose fantastically. I had 195 tyres installed along with spacers when I purchased my car. The fuel average was around 16 , plus the lower body used to get dirty a lot due to the thickness of 195 tyres as those were about half an inch or more out of the fender ..
Removed spacers and 195 Tyres. Got 185 tyres with flexible and a bit larger springs on back shockers and bingo... Both issues infact all three issues got resolved.
Fuel Average got upto around 19 on extreme busy Karachi city with AC on all the times, Car never gets banged into speed breakers ( I dont go zig zag but yes on dead slow speed obviously) and last but not the least, the underneath body is far more clean as 185 tyres are mostly inside the fenders . ( 175 Tyres are recommended for Aqua but these would be too much thin and further lower in my opinion as every cms counts on Karachi roads:)
Thats my personal experience and a win win situation on these issues so far....
