Graziano oil questions

[A.J. Schreder]

I had a crank seal let go on my Lexus 1UZ engine, that took a while to replace. I moved the engine back 6" to gain clearance, which it turns out I probably didn't need to do. But I have a trans oil cooler and dripped some oil. I have a ton of questions:

Is the fill level just even with the fill port? Is that the same with a trans cooler (Setrab 625)? Ove heard don't worry about topping off the oil level after installing the cooler. But if I'm going to change the oil, do I fill to the normal level? If I've lost a bit of oil, is it critical to top it off before heading to the track?

Does this trans oil have an oil change interval? This is primarily a street car, no more than 6 track days per year. My car has been driven for 5 years, has 4000 miles.

Is there a recommend oil to use? I found MT-90 for street and occasional tracking ... 75W90 NS for heavy track use. Should I go for the heavier oil, or is there a trade off? I assume 75W90 is the stock oil.

Thanks for the help.

A.J.

 

[A.J. Schreder]

Oops, meant to say I assume the MT-90 is the stock oil. But I think MT-90 is also 75W90, which is GL-4. The 75W90 NS is GL-5 and lacks the friction modifiers for the limited slip. Did I get this right? To answer my own question, I think the MT-90 75W90 GL-4 is the oil to use.

I looked inside my transmission case with an inspection camera and the level isn't close to the fill port. So I will be topping it off.

A.J.