Quote:
Originally Posted by ZDan
It doesn't have to be "experimenting", you should just pick viscosity based on max operating temperature and overall usage. If operating temp is 270F at the track and you don't drive on the street, 10w50 might make sense. Not so much street/track tho... FWIW I've been running 5w30 street/track with no cooler, temps up to 275F at the track. Might go to 0w- or 5w-40 this year...
Highly doubtful this is needed. My BRZ is the first car I've tracked a lot that didn't use any oil at all at the track. Typically I see 5000 street miles and 4 track days (~2hrs) between changes and I've never had to add oil between changes. In another thread somebody mentioned they added a catch-can and then removed it as it collected next to nothing. These engines are pretty good at containing the oil under track usage.
For me, I just swap trans and diff fluid out every season or two, never bothered to try to measure temps of these fluids. You could, but then it's the kind of thing where if you see the temps you may then think you "need" a trans cooler and a diff cooler. In reality you probably don't...
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Upon further research, because the concept of 10W-50 was so new to me, there have been other recorded Forum cases of people using it, the more you know I guess. So I would agree is not actually experimenting. Though the option of an oil cooler might still make a little sense if not switching oils between track sessions, but that would be the prerogative of the owner.
What I meant with checking other fluids, is the fact that OP made it sound like he lives on the edge and so does the car. If you're constantly hammering the car you should probably shorten, or keep in consideration, the time between other fluids such as brake and LSD or even transmission. But I hope OP does the common recommended items for when you start tracking the vehicle.