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Does octane booster work? #4497669
08/25/17 09:52 AM
08/25/17 09:52 AM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 5,123
Houston, Texas
After mistakenly filling up approximately 30 gallons of the wrong grade in an effort to save money it got me thinking why not buy octane booster instead. I noticed one day that gas prices went down a substantial amount, so I decided to make a run and fill up all my cans for my lawn equipment since I have a lawn care business. Usually I put 87 in the mowers and 89 in my smaller one gallons for the handheld equipment, but for some reason I filled all the cans with 89 somewhat defeating the purpose of what I was trying to do and ended up paying an extra $.25/gal. This got me thinking, why not just buy all 87 and go spend $3.00 on a bottle of octane booster?

I haven't ever looked to see how many gallons it treats but I figured, hey I have to mix the 2 stroke oil why not just add a drop of octane booster while I'm at it too.

Opinions?

Last edited by motor_oil_madman; 08/25/17 09:54 AM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Does octane booster work? [Re: motor_oil_madman] #4497671
08/25/17 09:54 AM
08/25/17 09:54 AM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 5,123
Houston, Texas
What brand do you recommend?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Does octane booster work? [Re: motor_oil_madman] #4497680
08/25/17 10:07 AM
08/25/17 10:07 AM
Joined: Sep 2015
Posts: 3,939
Connecticut
69GTX Online content
69GTX  Online Content
Joined: Sep 2015
Posts: 3,939
Connecticut
I tried using several types of octane boosters back in the 1990's as I needed 98-100 Octane for my '68 GTX. The alternative was filling up cans of aviation/racing fuel and bring it home every few weeks. While it was easy to boost Sunoco 94 up to 98-100 by mixing in 104....none of the Octane boosters did anything for me. They all pinged under hard acceleration. If there is a boost, it's negligible imo. These were the boosters you find at most local retail outlet in 12-16 oz bottles.

If you're running a high % of octane boost in your small equipment it may work. But that would seem more costly than just buying gallons of 100-102 Octane gas.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Does octane booster work? [Re: motor_oil_madman] #4497689
08/25/17 10:22 AM
08/25/17 10:22 AM
Joined: Jun 2012
Posts: 1,759
USA
oldhp Offline
oldhp  Offline
Joined: Jun 2012
Posts: 1,759
USA
If you have 87 octane fuel and use a product that says this bottle with "X amount of fuel will raise octane 4 points".......You get 87.4 octane. I use 93 octane for all my home use OPE, in your case I would keep using the 89 octane fuel. Maybe in the full heat of summer mix premium 50/50 with the 89 fuel for your small engines.


2018 RAM 1500 3.6/8 speed.
2017 Jeep Sahara Unlimited 3.6
"U kan't fixe it......if'n it ain't broke."
Re: Does octane booster work? [Re: motor_oil_madman] #4497724
08/25/17 11:17 AM
08/25/17 11:17 AM
Joined: Apr 2012
Posts: 5,586
MA
Wolf359 Online content
Wolf359  Online Content
Joined: Apr 2012
Posts: 5,586
MA
Do the math and see if using super is cheaper. Around here, super is 93 octane so to get 89, you'd mix 1 gallon of super with 2 gallons of regular. Usually there's some extra premium with 89. For instance 89 might be 25 cents more, but super is just 40 cents more so it's cheaper to make your own mix. That's all they're doing to get the 89 mix anyway. Even if you just have 91, then it's just 1 for 1, but if the premium is less than 50 cents between regular and super, it's cheaper to make your own mix. Just takes a little longer and just depends how much time you want to spend to save 10 or 20 cents a gallon.

Re: Does octane booster work? [Re: oldhp] #4497757
08/25/17 11:48 AM
08/25/17 11:48 AM
Joined: Jun 2003
Posts: 10,535
Illinois
javacontour Offline
javacontour  Offline
Joined: Jun 2003
Posts: 10,535
Illinois
Originally Posted By: oldhp
If you have 87 octane fuel and use a product that says this bottle with "X amount of fuel will raise octane 4 points".......You get 87.4 octane. I use 93 octane for all my home use OPE, in your case I would keep using the 89 octane fuel. Maybe in the full heat of summer mix premium 50/50 with the 89 fuel for your small engines.


This ^

You have to understand what they mean by "points"

I seriously doubt it is going to be cheaper to "roll your own" here as the station get their fuel in bulk and the bottles of octane boost, not so much.

But here you go: http://www.hotrod.com/articles/fuel-octane-rating-comparison/

So with 87 octane fuel and 1oz/gallon of 104 octane boost, they saw under 2hp performance increase on a ~400hp engine. Probably in the margin of error.

Certainly not equivalent to what they got with straight 91 octane. Closer to the results with 87 octane.

(And I realize that what we really have here in the US is not an octane rating, but a anti-knock index (AKI) which is the average of the Motor and Research octane ratings of the fuel.)

I think you and your wallet are better off buying the 89 or higher fuel than trying to roll your own.


network down, IP packets delivered via UPS -BOFH
Re: Does octane booster work? [Re: motor_oil_madman] #4497759
08/25/17 11:50 AM
08/25/17 11:50 AM
Joined: Jul 2010
Posts: 19,274
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 19,274
PNW
Originally Posted By: motor_oil_madman

Usually I put 87 in the mowers and 89 in my smaller one gallons for the handheld equipment, but for some reason I filled all the cans with 89 somewhat defeating the purpose of what I was trying to do and ended up paying an extra $.25/gal.

Wow, 25 cents per gallon difference between 87 and 89 octane? It's typically 10 cents difference everywhere I buy gas.

Seems 87 would work fine in all small low performance engines used in lawn care type of equipment. I've used 87 obtain in a 180 HP 4 cly motorcycle with no problems.

Re: Does octane booster work? [Re: motor_oil_madman] #4497761
08/25/17 11:54 AM
08/25/17 11:54 AM
Joined: May 2011
Posts: 65
Des Moines, IA
Loi Offline
Loi  Offline
Joined: May 2011
Posts: 65
Des Moines, IA
Using octane boosters in the past always left my spark plugs fouled and there's a copper colored coating on the tips. I wouldn't suggest using octane boosters at all. They help prevent knock for the time being. If you really want to raise the octane rating I would recommend adding some race fuel such as Sunoco 260GT.


'05 GDB STI
'16 VAB STI
Re: Does octane booster work? [Re: motor_oil_madman] #4497775
08/25/17 12:20 PM
08/25/17 12:20 PM
Joined: Dec 2003
Posts: 9,926
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,926
Florida, Cape Coral
Read the information on the can carefully. If it says it will raise the octane 10 points, that means it will increase the octane one tenth so 89 becomes 89.10 Ed


CX5 Touring 2.5L :-)
Re: Does octane booster work? [Re: motor_oil_madman] #4497790
08/25/17 12:47 PM
08/25/17 12:47 PM
Joined: Jan 2016
Posts: 325
TX
mooferz Offline
mooferz  Offline
Joined: Jan 2016
Posts: 325
TX
The most effective commonly available octane booster is probably MMT, but it leaves unwanted deposits and is only legal for off-road use, so should typically be avoided.
The most cost effective octane booster is a few gallons of E85 in the tank.


2001 Lexus ES300, 235k mi, German Castrol 0w-40, Fram TG8316
1985 BMW R80RT (1L)- M1 15w-50
1993 Volvo 945 Turbo- Rotella T5 10W-30 (CJ-4)
Re: Does octane booster work? [Re: Eddie] #4497799
08/25/17 12:59 PM
08/25/17 12:59 PM
Joined: Sep 2015
Posts: 3,939
Connecticut
69GTX Online content
69GTX  Online Content
Joined: Sep 2015
Posts: 3,939
Connecticut
Originally Posted By: Eddie
Read the information on the can carefully. If it says it will raise the octane 10 points, that means it will increase the octane one tenth so 89 becomes 89.10 Ed


I never knew that. 10 pts to me would mean 89 to 99. Must be the new match....or using "basis" points as with interest rates. LOL. No wonder that stuff never did squat for me. I'd have had to have added a few gallons of that stuff...not a 16 oz. bottle.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Does octane booster work? [Re: motor_oil_madman] #4497819
08/25/17 01:30 PM
08/25/17 01:30 PM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 5,123
Houston, Texas
Well forget it then I guess.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Does octane booster work? [Re: motor_oil_madman] #4497821
08/25/17 01:31 PM
08/25/17 01:31 PM
Joined: Jun 2003
Posts: 10,535
Illinois
javacontour Offline
javacontour  Offline
Joined: Jun 2003
Posts: 10,535
Illinois


network down, IP packets delivered via UPS -BOFH
Re: Does octane booster work? [Re: motor_oil_madman] #4497859
08/25/17 02:13 PM
08/25/17 02:13 PM
Joined: Jan 2008
Posts: 546
North Carolina
WANG Offline
WANG  Offline
Joined: Jan 2008
Posts: 546
North Carolina


"Sportbikes have evolved from an axe into a scalpel.
Problem is, the average sportbike buyer is more lumberjack than surgeon." -Richard Pollock
Re: Does octane booster work? [Re: ZeeOSix] #4497870
08/25/17 02:21 PM
08/25/17 02:21 PM
Joined: Dec 2016
Posts: 7,143
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,143
Waco, TX
Originally Posted By: ZeeOSix

Wow, 25 cents per gallon difference between 87 and 89 octane? It's typically 10 cents difference everywhere I buy gas.


Yes, Texas is like that - "MID-grade" is always a HUGE rip-off

I hate the "single-hose" gas pumps -
I pump about 2-2.5 gallons of 93 into my Harley
and then "flush the hose" with .5 gallon of 87


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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