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Old 31st March 2017, 10:44 PM   #5 (permalink)
charles charlie
charles charlie is chasing a Veyron from 30-130mph
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Join Date: May 2008
Location: North West
Cars owned: E36 M3 Evo, Mini Cooper S, 996 Boxster S, Caterham Super 7, Merc Tractor :(
Posts: 7,620
V-power in preference, Momentum if it's not available wherever I am.

I recorded knock with Momentum on track days and none with v-power. These were days when I arrived with a full tank of one then deliberately filled up from practically empty with the other. Same conditions through the day (air temps, laps done etc)

A significant issue with Momentum is it regularly has a higher ethanol content than v-power and ethanol absorbs lots of water over time.

I believe Tesco don't sell much of it at each station (have you noticed how long sometimes the pumps take to get going?) and absorbed water lowers the RON of the fuel.

That's my thinking on why I've gotten more knock from Momentum every time I've logged my car under decent load.
Arrived 29/5/09 Reborn 12/1/17

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