Your experience with ecotec engines

[SR5]

I have the 1.8L NA Opel/Holden/Saturn Astra. It's great ! Tight as a drum, handles well, easy of the fuel, I never need to top up the oil - just sits on the full mark all year.

GM Australia say run a ACEA A3/B3/B4 oil, and that's what I do.

SpazDog: "Pretty neat little European hatchback though."
Exactly

 

[Blang]

My Cavalier has the 2.2 Ecotec (L61). It's been good to me. Still has plenty of power (for what it is) after all these miles (almost 219k). I bought it when it had around 34k miles. I used Castrol Syntec for around 120-130k miles and I think I use Pennzoil Ultra once, and have used Mobil1 for the last ~50k miles.
I get 25-27 mpg in the city, 29-30 mpg in mixed driving and 32-35 mpg on highway trips. In its old age it does consume a little oil on highway trips though.
I don't have any complaints about the engine. It seems to like the ACDelco/Hengst oil filters the best for what it's worth.