Octane Booster

[99fxst99]

Running a 1999 300 PRoMax on a 21 Rally Sport. Stock engine. I have been running 93 octane pump gas from the gas station, but 89 is all that available at the local marinas. What is a good octane booster to use to treat the 89 at the fuel dock if I have to buy from the dock? And am I being too picky with the 93?

[Motv18]

Alcohol free 89? That’s rare

almost as rare as seeing a storage tank of 89. Normally stations run a blend pump 50:50 87/91 to average 89octane aki.

[delawarerick]

Ace's is good not cheap but works. A little goes a long way.

[nitro_rat]

Race Fuel additive is good stuff...

[big tom]

Alcohol free 89? That’s rare

almost as rare as seeing a storage tank of 89. Normally stations run a blend pump 50:50 87/91 to average 89octane aki.

Rec fuel at most marina fuel docks. 89-90 octane eth free with valve-tec fuel additive.

[Jay Smith]

I tested the ACES years ago with good results , I mixed it at double the suggested amount in a tank of 91 pump gas running in a motor turning 10,000 rpms and very high compression holding the motor at WOT for at least a mile , pulled heads after running 10 gallons of this mix through the motor , the motor survived with no issues ...I was amazed !!!

Jay @ JSRE

[Tcatrett]

I been using Klotz octane boost for years. Good price and results...

[Motv18]

Rec fuel at most marina fuel docks. 89-90 octane eth free with valve-tec fuel additive.

Wish I had that where I run

as for booster, vp and royal purple work well, but as mentioned aces is the go to for the marine world

[HStream1]

Smokey give me a call!!

Running a 1999 300 PRoMax on a 21 Rally Sport. Stock engine. I have been running 93 octane pump gas from the gas station, but 89 is all that available at the local marinas. What is a good octane booster to use to treat the 89 at the fuel dock if I have to buy from the dock? And am I being too picky with the 93?