Results of bioethanol corrosion testing

The Ministry carried out corrosion testing on bioethanol blended fuel on aluminium engine components. These tests simulated the use of bioethanol blended petrol in vehicles previously used in Japan.

Tests found that petrol blends containing bioethanol of up to 10 percent do not cause corrosion. The tests indicate that bioethanol blends sold in New Zealand will not cause corrosion in vehicles previously used in Japan.

Owners of new vehicles are able to find out whether a manufacturer supports the use of bioethanol in its new cars by asking their representative in New Zealand. A summary of relevant manufacturer’s statements has been made available by the Motor Industry Association. It is available on the Motor Industry Association website(external link) or through the New Zealand Automobile Association website(external link).

Read the full test results here [PDF, 5.1 MB].