Hi
I used to use Rock Oil Carbon Competition 5w30 oil in my BRZ and it was quite fine I guess. Spec sheet below:
https://oil-club.de/wcf/index.php?at...on-10w-50-pdf/
Unfortunately Rock Oil ceased distribution in Poland (and it seems also many other EU countries) so it's pretty difficult to get this oil now.. As such, since 6k km interval from last change is around corner, I'm looking for replacement. I'm looking for very high HT/HS oils since I'm typically getting high oil temperatures since I'm often driving at relatively high rpms to avoid torque dip @4k. Typically I'm having stable temps between 110-122 deg C on OEM temp sensor (which I know is fairly inaccurate but that's topic for another discussion) depending on season, weather and driving style. Some absolute max readings I temporarily got fell somewhere a bit below 130 but I'd count that as an exception rather than rule.
Rock Oil had HT/HS of 3.7 which as far as I know is very high so I'm probably looking for something similar.
Basing on thread I created some time ago and went through it again:
https://www.ft86club.com/forums/show...=149288&page=5
It seems that Redline 5w30 should be quite similar in terms of high temperature protection right? Sorry for creating new thread but I didn't want to necrobump that old thread, especially since topic is no longer appropriate as I finally went with 5w30 instead of 10w50 (which made engine sound funky and I didn't feel safe using it xD).
Are there any other oils with high shear resistance and high HT/HS worth to consider? Is Redline still good option in 2023? There always seems to be Motul V300 but it has lower HT/HS iirc so I'm not sure which one would be safer in higher temps. For reference price of V300 and Redline is basically the same in Poland.
I'm not running oil cooler and most likely I won't be running cooler any soon because car is still on warranty and installing aftermarket cooler would void my warranty, hence I kinda have to rely on appropriate oil unfortunately...