Do you want a 4WD that has the capability to seriously go off-road, or are you looking for an all-wheel drive SUV? I’m guessing it’s the latter and that you don’t plan to go bush bashing. You also haven’t provided us with a price guide, which makes it difficult to give you good, relevant information. Basically, however, you should go for the newest models that fit your budget, go for an all-wheel drive model, and choose a brad that’s got a good reputation for quality and reliability. That means any of the Japanese brands, plus the likes of Hyundai and Kia from Korea.

IT DOESN'T sound like an electrical problem, rather a problem with the carburettor, the auto choke in particular. I'm not sure what your mechanic did when he advanced it to open more quickly. But if the choke comes off too soon it will be too lean when you come to restart the car. When you turn off the engine after a short distance the auto choke will come off. But because the engine isn't fully warmed up it can need some choke to restart. With no choke it won't start. Have your mechanic check the choke to make sure it is set to specification and is working correctly.

You can work it out simply by calculating the amount of additive you need to add per litre of fuel. The instructions on the packaging will tell you how much to add per tankful, and you know how many litres your tank holds (if not check your owner's manual, which will contain the capacity of the tank), so divide the amount of additive by the tank capacity in litres and then multiply that by the number of litres you usually buy. Add that amount and you should be OK. Add a little more for safety if you like.