Feed it 95 RON and it runs ok, feed it the same fuel but with a single dose of Millers petrol power ecomax and it returns in excess of 4 mpg extra, the engine pulls stronger and it's quieter.
Could this be attributed to the cost of premium fuel & additives which subsconsciously makes one a little more light footed which makes the engine quieter and delivers better mpg?
Trying to cure the shortcomings of ordinary petrol is made difficult by the fact that we don't really know what those shortcomings are...
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