Hi Chas:
I have the same problem with my Cobra. Try this test, Get some duct tape and cut about 2 lengths at 18 " or so and tape up the front of the
oil cooler. (The tape comes off easy trust me).
Now run you engine and see if the
oil temp climbs higher than "normal" with the face of the
oil cooler taped up?
Mine did. So I created a plexiglass plate and velcro'ed it in front of the cooler. You still see the cooler. The plexi keeps out the bugs and in the cool autum weather all is fine. My oil is 180 now vs 140ish.
Possilby some foam insulation on the hoses will add more BTU retention but I have not done that yet.
Best to you Amigo.