Hey guys.
I want to share what I found out after couple week experimenting with my Jazz. First of all, fuel. Tried Shell V-Power and I feel significant better mpg and better acceleration. Second, same as everyone advised - pumped all 4 tyres to 34 psi, feel like 3%-5% better mpg.
But third thing is a bit disturbing... In my opinion, speed limiter is poorly programed in Jazz. Without speed limiter set up, car is amazing - very consistent reaction to pedal, smooth acceleration. But if I just set speed limiter manually or setting Intelligent Speed Limiter, things become different. Starting acceleration with limiter on is truly limited also, then, if you push pedal down, it reacts a kick car forward, causing like enormous fuel spray in motor and of course, lowering my mpg. In other words, I noticed poor mpg with limiter on, and smooth nice acceleration and nice high mpg with limiter off.
I want to say that these are just my observations and I can be wrong, but that's what I noticed.