I always used kendall super D 15w-40 having a hard time finding it.What is a good 2nd choice

Chevron Delo 400 is available at lots of places including Costco.

Sixto
95 S420
87 300SDL

Off the top of my head:
Dino
Delo 400 15w-40
Delvac 1300 15w-40
Pennzoil HD 15w-40
Synthetic
Mobil 1 15w-50
Delvac 1 5w-40
Amsoil 15w-40

Thats all I can think of now.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200