Dick, Thankyou for your reply. The results you report seem very positive. Offhand according to a friend I believe the A.A. tested them here a number of years ago and the results wernt all that encouraging. This conflicts a little with your experience. May have a bit to do with when they were tested and the vehicles they were tested with. (Possibly done late 70s, early 80s, or even earlier I would imagine when the majority of our vehicles were 10 to 20 years older and carburettors and engines were a bit more basic. Otherwise as Argentina is not that much further north than NZ in latitude would not have expected that much discrepancy. Where are you located and what is the altitude? Have heard reports of people here toying with water injection and reporting the opposite.Possibly worth toying with myself and seeing what results I come up with which I will probably do. Do you use any type of anti-mould additive or inhibiter? B.r., David
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