Crinkle cut chips hold more fat as they have a bigger holding surface. Straight are better for you.
I use straight oven chips cooked in my actifryer with no extra oil. They are the best chips ever.
I'm glad those hideous deep-fat chip fryers are no longer around. I thought they looked evil with all that spitting fat and greasy steam.
Mind, that's better than one ex-boyfriend who used a big pan and strainer filled with lard which was melted, and resolidified after each cooking. I don't know many times he'd reused the fat, but it looked horrendous. I only eat oven chips now, or chippy chips.
Chip shop chips are a wet soggy mess, they cook them at too low a temperature. They can be massively improved by getting them home and refrying them in your chip fryer set to maximum temperature 185 Deg !
You can make your own triple cooked chips in batches and freeze them before the final 'brown'. Use Maris Piper potatoes , nothing else comes close!
Cut them to the same size 1/4 inch/ 6 mm Sq , par boil for 2 to 3 mins, cool and dry them, then 'blanch' in a deep fat fryer at 150 deg. You can then drain and freeze them at this stage.
Finally 'brown' them at 185 deg as hot as you can get the fryer !
Result will be perfect chips crisp on the outside but soft on the inside!
As I said 'browning' chip shop chips at 185 deg is almost as good !