How long in a carseat while travelling?

I'm trying to figure out how long DS can be in his car seat while we're travelling this Xmas.

I've spoken to two Plunket nurses, one said 3 hours, one said 1.5 then a min 45min break!

What have you heard?

When he start crying and being really bored we stop otherwise we just keep going.

Lily was 4 months on our first trip and we were told 2 hours is fine and then a 30 min break and then 2 hours... etc.

ETA: We kept to routine though and she normally did 2 hour sleeps and we stopped and had something to eat as well so that was our 30 mins.

I think it does pay though as one of my coffee group mum let her oldest stay in the carseat way too much and she had shoulder/neck problems from being slumped over asleep.

Edited by Lil_Nic9

Hmmm, so many different recommendations!

We were told 1.5-2 hours then a 20-30 minute break. Also means you get a break from driving, and dont have to worry about stupid campervans for a bit! lol

I did the trip from Wellington to Christchurch when DS was 6 weeks old... tried to keep him out of the capsule as much as possible while on the 3 hr ferry crossing, then it was drive for as long as he would let us which meant stopping at Kaikoura for a feed and change etc... then got to Christchurch just as he was starting to fuss again (he pretty much slept the whole time in the car).

But in saying this, I later took him to a Chiropractor and he had a couple of issues with his neck and pelvis and I now believe I should have included at least one other stop along the way for a 'stretch'.