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· Old Opeler
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Have a 1973 P6B Rover with a 10.5:1 CR engine - should use 100+ RON fuel but only 97 RON unleaded available now (other than AV. Gas!). It always 'pinked' under hard acceleration.
Bought a parts car which had a 'FuelStar' tin based catelizor in the fuel line so swapped it in when the fuel line needed replacement.
100km later - NO PINGING! Even went back to 6 degrees of initial advance from the zero I had to run before.
Then changed to 91 RON fuel - NO PINGING!!
Either it works or has HUGE phsycic powers and makes me think it works.......!
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