Under the Consumer Guarantees Act, goods that are normally bought for personal use must be of an acceptable quality, fit for purpose, free of minor defects and be safe. These guarantees also apply to fuel.
The Fair Trading Act states that companies can’t misrepresent the qualities of a product they sell. This legislation is enforced by the Commerce Commission.
Fuel samples may be tested for any of the properties specified in the regulations, depending on your complaint.
There are approved alternative testing methods.