"HEET" fuel additive

[Zman]

Originally Posted by Zman

Having 7 C4 ZR1s and only 91 octane available. VP Octanium! Call me stupid! People are opinionated......Some are experienced.

Sad I can?t buy 93! But have learned to adapt.

[Zman]

Originally Posted by Zman

Sad I can?t buy 93! But have learned to adapt.

A subject that pisses me off! I have high horse power cars and only 91 octane available.

[Zman]

Originally Posted by Zman

A subject that pisses me off! I have high horse power cars and only 91 octane available.

I have ran about $3000 worth of VP Octanium thru my cars. Both Marc and Pete work on them.....,,,,,,not one issue with the fuel or additives noted over 40,000 miles.

[Zman]

Hib, if you are reading this, times have changed and maybe the products have been perfected, but this stuff works as stated.

[Zman]

Just recently took my 385 to Pete for tuning. I have put about 11,000 miles on this car. Every tank of fuel received 2 bottles (32oz each) of VP Unleaded Octanium. Pete changed the spark plugs and O2 sensors out of caution and found no adverse affects on these parts from extended use of VP Octanium Unleaded.
I don?t run this in any cars with catalytic converters still installed on them although it claims to be safe to use with cats. I have two cars that are almost identical, 4:10s, ported, etc. I have experimented with using just 91 octane in one and adding VP Octanium in the other. The difference is unmistakable. After running both tanks of fuel thru I then switched witch car received the VP Octanium. Same results, the car that ran the octane booster was noticeably peppier and ran much more aggressively. So from extreme personal use of this product and having just received my 385 back from Pete, I will continue to use this spectacular product until I can pump 93 octane into my tanks.

[Paul Workman]

Well, know too that the EPA mandated back in the mid-late 80s that ALL gasoline vehicles manufactured in the US be capable of running on 87 octane.

For a high compression engine to be able to run on lower octane fuel, it must be able to detect knock and modify (retard) spark advance (primarily).

So, why the "Use Premium Fuel" stamp on the cap of the gas tank?

Simple: premium fuel will produce more POWER by way of higher spark advance (within limits). The computer programming* is designed to constantly "test" the octane level via the knock sensor. The program (algorithm) will probe (octane) by advancing the spark timing until the knock count advances to a predetermined threshold (knock frequency). Once that threshold is reached, spark advance will be halted at that level unless or until the spark frequency is reduced, i.e,. switching to premium fuel (higher octane).
Thus the engine will "run" on a wide range of conditions and octane availability; just not with the same performance (power) potential as it will with higher octane levels.

_______________
*"Corvette Fuel Injection and Electronic Engine Management" by Charles O. Probst

[Zman]

I have also tried mixing race fuel to achieve the same results. I can only get 102 Octane that has been oxygenated. (5gal pal $64!) This results in very poor gas mileage because more oxygen = more fuel. I get 17 mpg with octane booster mix and 12 mpg with race fuel mix!

[Corvette95]

I also have a entire crate of this Rislone Octane boost.... would it a benefit or a negative? (running 90 octane non ethanol with Haibeck prom )

https://rislone.com/wp-content/uploa...ch-Sheet-2.pdf