Hi guyz

Couple of questions

GU IV 2005 zd30

Q.1
I've been using Caltex delo 400 oil for a while now. Caltex depot near my house is closed down, so i cant get any cheap 20L drums
What other oils can i use ? i'm looking at purchasing 20L drums. What are you recommendations ? pros and cons ?

Q.2
I want to replace to glow plugs in my truck. its just clicked over 200,000kms . I've seen a few diff type on ebay. Which are the most reliable that wont break ? I've seen NGK , BOSCH , E-techno 1 , HKT ?

What are the pros and cons of metal ones. I want some that wont break and stuff me engine up. I don't mind how much it cost either to keep the zd30 happy !

thanks heaps

Limmy