I got my yellow 1.5 SE Extreme earlier this week and the first thing I did was upgrade the speakers. The stock speakers were rubbish. Even my laptop speakers sounded better!

However I have a few questions.

1) My fuel consumption is quite high. I only get like 8.5km/liter even though I'm not very heavy on the pedal. Is this normal or would it improve after the first service?

2) I would like to install autolock like my Kelisa used to have. Would this void any of the warranty of the car? It's really crappy that my 8 year old Kelisa has autolock but this car which is newer and more expensive don't have.