I've got a mk5 1.6 twinport sxi (2006) and i'm worried it might be running a bit cool.
You might know there's no temp guage on the dials on a mk5, but you can see coolant temp in a hidden menu on the display.
When it sat idling on my drive for 10 mins or sat in traffic jams the temp goes up to 100 ish then the fan kicks in as normal
however, when driving at 60mph the temp goes down to 65-68 degrees.
I took it back to garage i bought it from to be checked, he said he's checked thermostat and it opens/closes fine.
What temp does your 1.6 twinport run at when you're driving it?
any advice? Mechanic said he's called vauxhall technical services and is waiting for them to get back to him (independent place, not main dealers)