[HI Cobra]

When I was in Hawaii where the gas stated as 92 octane might be 89 octane at
best, I found that adding about 1 gallon of 110 avgas per 10 gallons of the 92
premium made the 351 run much smoother in high gears (while driving up H-3
freeway to get to Kailua) at lower rpm's. When I shipped it to Texas it runs about
the same here with the 93 octane as it did with the avgas there. At $6/gallon it
was a cheaper option for better performance - and yes, it did smell great!
No need it here in Texas.