Change Based on oil used---
Mobil 1 or Castrol Syntec Edge at 15K
Amsoil at 25K
I DD 50 miles, use to be 105 a day.
SC for 38K miles with a 25 row Oil Cooler. 56K on car right now.
NO Problems, I drive the car hard each day. 5-7 PSI of boost 2 to 5 times each way.
No WOT longer than 3-5 seconds in 2nd/3rd gear, any longer would be to extreme on the street.
I do not track. When I did SCCA would change after 3 events, 20 years ago, not in the Z!
Note: Castrol Syntec Edge, I got some on my hands and it took 3 days to get it off. Same weekend I also did Mobil 1 in my wife's car and it washed right off.
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It's not my fault I'm old, I was born a very long time ago!
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