Quote:
Originally Posted by Code Monkey
Oil temps do not depend much on ambient temp but on revs. Take a stock twin out on a highway, and drive at 7,000 rpms in 3rd for 5, 10, 15 minutes, watch/log the oil temps. Easy 270 F or more.
If I were you, I would do a track day, then change the oil and install an oil cooler. I have a RacerX 19-row Setrab oil cooler and it has been great keeping oil temps at around 240 F.
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This right here is on point. It's all based on revs. Ambient temperature affects it some, but not nearly as much as you might imagine. Since there's no cooler in place from the factory, the ambient temperatures only affect oil temp in-so-much as they affect coolant temp and that keeps the engine cooler overall.
I did my first 3 track days without an oil cooler and nothing catastrophic happened and it was mostly in the 80s. But as soon as I saw the temps on a data logger I knew I needed to get it down. If I'd known after my first track day I probably would have installed an oil cooler before the next two.