woogoo
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- Perth, Scotland
You could attempt a fairer test, avoiding the "placebo effect". In order to do this you need to be ignorant of the fuel in use, thereby avoiding subjective reading of vehicle performance. Just get someone else to fill her up, and in order that you don`t work out which fuel is in the tank they`ll have to pay too.
I`ve been looking for an assistant in this experiment for the last two years.... voulenteer anyone?
That's a fair comment and I am well aware that there is a possibility that the outcome can be influenced simply by perception and my assumed expectations, but I have had the car for 4 years and I know it inside out and as a consequence I feel comfortable and confident in saying what I did.
But I agree with you a blind test would be a lot less subjective, my son is covered to drive the car, so getting a volunteer to do this wouldn't be an issue. However, the only real problem here is how often do you do the blind test?
Ideally, you would need to do it at least three or four time, and I think he'd be a bit hacked off at shelling out £400+ for fuel for my car but I of course could always pay him back after the experiment was completed.