Permanent oil cooler vs thermostat

[Lt86]

Hi guys,

Another question I couldn't find an answer to using the search option.

The AE86 is very new to me so I'm learning new things every day . Anyways, as seems normal... when cold, the engine will idle around 2500 rpm and keep doing so for quite a long time because the oil stays cold for a long time when it's cool outside. Since I still have an exhaust that is too loud for my taste, I feel like a total dumb*ss at the traffic lights in the morning with the high idle. .

I'm puzzled why the AE86 has a permanent oil cooler instead of one that is connected to a thermostat. It seems to be beneficial to keep the oil from circulating through the cooler unless it's warm.

My question... does anyone else have this problem? What did you do about it? Did you fit a thermostat and if yes which one?