John Larkin
Sublime Master of Turbology
- Joined
- May 25, 2001
- Messages
- 4,986
Since 89 octane gas is $0.10 higher than 87 octane, a tank-full for me is roughly $1.60 more expensive. If there is some additive that would boost 87 to 89, what is it and could it be had for less than the pump price difference (not to mention the PIA difference)?