Is it a good idea to use a different engine oil for our very hot summers?

If so what would you recommend?

i use 25w60 nulon highest in zddp ( zinc ) and full mineral oil

I just had an engine rebuilt, and they recommended and use Penrite HPR 30. With the extra Zinc, it is suitable for our older style engines, and air cooled engines. I also use it in my 1964 EH Holden.

the penrite product doesnt have much zinc in it its abit of a scam