Jerry, and all.
This is something I'm quite conscious of myself. One of the reasons I'm enjoying cooking curry is that I'm making things to my tastes. The curry isn't floating in oil, and isn't over salted. The last time I ordered a take away, I was horrified in the quantity of oil it had, and spent ages spooning it off. In fact since I started using this site around xmas time, I haven't had a take away since. I'm scared of what my opinions will be when I do!
Rule 1 for me is less oil and hardly any salt, with the other flavours in the curry you just don't need it. It's like giving up sugar in coffee, once you're used to it, it's better.
And Jerry, I would say it's the rest of your diet that's the problem. Cut out the pizzas, fry ups etc. Pizzas are the worst food anyone can eat, as far as health is concerned. Currys aren't great in themselves, so I make sure the rest of my food intake is cereals with fruit, nuts and yoghurt in the morning, and lots of fresh stuff (vegetables from the allotment!) as much as I can. By the time you get to the curry, it's all the more worthwhile!