vortex2 wrote:
Out of complete curiosity I filled my car with 99 octane petrol at Tesco the
other day.

See http://www.greenergy.com/products/99_octane.html

99.9p/litre versus 95.9p for 95 Octane. Basically I suppose the same price
when measured in "pence per octane"

My car (5 year old Volvo) has never run better.

I've yet to see if there's an economy benefit (I'm sure there will be).



One of the car shows on TV did a test and one car it made no difference
at all, another it increased the max hp marginally and another it
helped in the low-mid range but not in the high end. So it seems it's
good for some cars and not for others. Tescos 99 stops my M3 from
making horrible low rpm pinking noises.