markmurfie
Well-Known Member
https://vpracingfuels.com/product/motorsport-109-ms109/I see some intermittent knock at throttle tip-in and am trying to determine if it's real or false. I've mixed in some vp octanium and saw no change but would like to try some actual race gas as well. I know that certain oxygenated fuels have a different stoich than the standard e10 the car is tuned for. What fuel is best to use when strictly trying to troubleshoot s potential knock? I see ms109 is the most commonly discussed but if I'm not mistaken it really needs a specific tune otherwise the car will lean out.
Thanks
You are mistaken, ms109 is a direct replacement for premium unleaded.
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