all you can do is give it a go yourself.
like i said its not the most accurate test in the world. and its more the pricable of the thing that my freind is looking for. but for an extra 7p a litre was the harm in giving one tank a go. i use it all the time when i wassnt doing this just for that bit more responive drive it gives. lol i need every last HP seems im driveing a DTi lol
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