My brother is looking to replace his current car (a high-mileage 1600 2000 Opel Corsa) that is a real fuel-guzzler. It is driven almost exlusively in and around town, so it never gets a chance to run economically, resulting in 400 km on a 45 litre tank being the best result. It's serviced regularly and has even had the fuel pump and injectors replaced. Barely an improvement. As result, we're looking at a newer, cheaper-to-run alternative and we have our eyes on the pre-2011 Picanto. The old bug-eyed, squirrel-faced variant.
We know the size, engine power and overall build quality will be a step back from the Opel to the Picanto, but this is an economic decision. Newish car that should be cheapish to maintain - the car is fairly basic so home repairs are possible - and will hopefully be light on petrol.
I've scoured the net but can't find any solid real driver feedback. Manufacturer claims and road tests are BS as I can't even match those claims in my own car and their figures are reached under exceptional circumstances. I also know that smaller, older tech engines are not necessarily always economical. So if possible, I'd like feedback from someone who has experience with the vehicle, specifically on fuel economy. Bonus points if you spend the bulk of your time sitting in heavy, peak hour traffic.