few questions on punto

i've bought a 96 punto 1.1 S it is well basicly naked inside which are standard measures for speakers rear 10cm and front 8.7 ?? would it be better if i put 13cm speaker with plastic adapter
there is no iso connector i guess i should buy it and plug in it all those little switches and power etc.
which oil for engine should i use i mean which is reccomended by fiat ( mineral, synthetic, particular brand ?? )
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.