So, here are our conclusions so far regarding oil coolers in Europe:
- All radiator-type coolers have the problem that they remain 10–15% open, even if they have a thermostat, to prevent sudden temperature changes. At normal motorway temperatures, the oil will cool down too much, so ideally the radiator should be covered in summer.
- The HEL radiator has a good core (Setrab), but some users have reported leaks at the connectors.
- Mishimoto has a low quality core, probably affecting oil pressure more than Setrab cores.
- Ansix Auto offers a good option to prevent overcooling, but we have to import it from the USA or Canada.
I still can't see a clear choice; perhaps I won't install one and I will just do a hotlap and then cool down with another lap.