Coolant/Spark ?? (3066 Views)

Hi Every Body,

Greetings! I joined this forum recently. It is interesting see messages/help.

I like to know the difference between radiator drain refil and coolanr flush.

What is recommended for toyota Corolla/Camry?

I do see in the market coolant with 150K miles/5 Year etc. Do we able change coolant on 150K/5 Year frequency?

I do see platinum spark plug for toyota Corolla/Camry 100 K etc, but owners manual recoments to change at 60K miles. Which one is correct?

Thanks in advance.

Ram