My new to me RV 7 has a 210 HP IO 360 and the oil temps seem high. It has a plenum on it with a Niagra Thermal oil cooler model 20002A mounted on the firewall with large scat tubing feeding it. The plenum cowling is sealed well and my CHT's are fine. It has been hot here lately in the high 80's to low 90's ambient. I saw 235 plus today running 23 squared at 8500 ft MSL with 80 degrees OAT. It was getting to 240 yesterday doing touch and go's and had to land as I was afraid to keep flying it. I have an Aviat Husky that never gets this hot and it looks like it has the same size cooler. It appears to have a scoop on the lower cowling that looks fairly restricted to be but I am not familiar with these planes. I was wondering if enlarging the opening a little will help? It does not look like there is much I can do and it may be that it will have oil issues in warm weather. I am sure it will be better when it cools off. It also looks like the way the plenum air goes over the engine it is already hot when it gets to the cooler. I have checked the sensor and it appears to be correct. Any ideas?