What's so special about the Sunoco 93 octane that that the series requires to run in the JS F4 cars? Wondering why it's $14 per gallon, when I can go to the pump and get 93 octane for $4 gallon.
$14 a gallon for 93 octane?
What's so special about the Sunoco 93 octane that that the series requires to run in the JS F4 cars? Wondering why it's $14 per gallon, when I can go to the pump and get 93 octane for $4 gallon.
Is Sunoco one of the series sponsors?Originally Posted by Hanssen26
(Maybe all "professional" series should require entrants and drivers complete a course in the economics of racing.)
Peter Olivola
(polivola@gmail.com)
Spec Fuel = Easy to Tech
Tim, two reasons they want a spec fuel: 1) to balance the Honda engine performance playing field so that everyone is getting "equal" power from the fuel, and 2) because it makes it much easier to test each racer's fuel for cheating.
The tech people know the chemical "fingerprint" properties of the Sunoco fuel (dielectric constant, density, RVP, reagent reactions, etc), making it easier to confirm if a competitor has illegally added any performance improvers.
Side note: Illinois and Wisconsin pump gas at 93 octane contains approximately 10% ethanol. My guess is the Sunoco 93 has no ethanol.
Last edited by Jon Jeffords; 05.10.25 at 9:15 AM.
10% ethanol will make about 4-6 hp less than 100% gasoline. There are fewer simply fewer BTUs in ethanol than gasoline.
“Racing makes heroin addiction look like a vague wish for something salty.” -Peter Egan
a cynic (not me LOL) might suggest that a dying ‘pro series’ with only 8 entries is finding ways to generate cash flow… ?
ymmv
Ian Macpherson
Savannah, GA
Race prep, support, and engineering.
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