Do I need to keep this level of oil changes up?

We have a Corolla and a Jimny both bought new and now 8 years old. They do 6000 miles each p.a. I change the oil twice a year on both with Total 5w/30 fully synthetic oil. Am I wasting money doing these changes so often?
They don't need "fully" synthetic. Semi synthetic will do. Better to keep the regularity of the oil changes up rather then extend the oil changes and stick to synthetic.
Answered by Honest John on

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