Gumout 800001706 Octane Booster - 10 oz.
Price:$4.05+Free shipping (Addon item)
Your rating(Clear)Rate this item


There was a problem filtering reviews right now. Please try again later.

4 of 4 people found the following review helpful
on January 27, 2014
Gumout Octane Booster is the only product that keeps my Custom 2001 Toyota Tundra running at peak performance. Adds more mileage to every tank and will never allow my motor to sputter or knock. This is not a fuel additive designed for super high horsepower engines. But works great for anyone, with a few extra horses under the hood. Trust me, I have tried them all, and this also works well in the tanks of my classic, new and modified muscle car collection.
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
3 of 3 people found the following review helpful
on February 4, 2013
The 91 octane gasoline I use in my supercharged 5.7 litre GTO has never been good enough to avoid engine knock under certain conditions. The Gumout worked, but using one bottle in a full tank of gas wasn't good enough....I had to double up to completely eliminate the knock.
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
2 of 2 people found the following review helpful
on July 8, 2012
I have a 2005 Infiniti G35 Coupe with the VQ35DER (Revup) motor and the engine recently started pinging on acceleration through the 3-4k RPM range. At first I thought it was bad gas, but it's been pretty consistent no matter where I fuel up. So, I got a bottle of Gumout from Wal-Mart for like $3 and after about 10 miles of driving the pinging is gone and acceleration is smooth and strong. I'm still thinking I may need to run a colder sparkplug and may try that when I change my plugs as they are due. I've also heard good things about Lucas Oil octane booster and may give it a try next. But Gumout is a good product from what I've seen...

EDIT: Followed up with Redline SL-1, please read that review as it was a better approach and more effective product for my pinging issues revolving around carbon buildup... Gumout Regane is also a better approach for fuel system, combustion, and intake treatments...
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
1 of 1 people found the following review helpful
on August 7, 2014
Cannot tell if it worked well or not. My new MB produces a sound the sounds like knocking/pinging. MB replaced the pistons. Knocking sound persisted. I requested MB to check again. They tested the car with 93 octane gas, which I have been using all the time, and still have the sound in certain slopes and turns at low rpm. Then, they tested with 100 octance gas and allegedly did not have the sound anymore. MB then proclaimed that there was nothing wrong with the engine itself.

100 octane gas is about 8 dollars a gallon. Cannot use it often. So, I put this booster in with 93 octane tier 1 gas. Psychologically it seemed to help although I would still hear the knocking sound. I assume the product worked a little bit.
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
1 of 1 people found the following review helpful
on September 21, 2014
had bought these before the price doubled. Certain Harleys have high compression (ie. the 1200's) and must have high octane gas. Oftentimes hi-test can be 40 + cents more/gallon, so getting a brand name regular (Shell) and adding a few capfuls of this product was actually cost efficient. I had paid less than $3 as an add-on with free shipping- not long ago, either. (Summer of 2014)
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
3 of 4 people found the following review helpful
on July 11, 2014
I was happy to use the product until the huge price increase. Dropped it for now until/if it goes back down. I can still purchase locally for under $3. Four stars for the product.
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
1 of 1 people found the following review helpful
2+ mpg increase overall at 70 mph highway driving.
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
on June 27, 2015
its greast an very noticeable in my 406 ,just buy it at walmart for $3.00 a bottle ,this thing about list price for 23.00 is a lie .get a case for 36.00 12 bottles again walmart stay away from anything less ,of you need to use 93 octane gas to get near 94 octane from this
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
on November 25, 2014
Did not notice any gas mileage improvement as probably I should. It says treats up to 15 gallons but don't know how much it actually raises octane count. Is it 0.2 or 2 points?
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Highly Recommend,,,Muscle Cars Are In Need Of This Well Known Manufacturer,,,Since Pump Gas Is Not Enough Octane Wise,,,Especially Sunoco's 94,,,
0CommentWas this review helpful to you?YesNoSending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse

Questions? Get fast answers from reviewers

Please make sure that you've entered a valid question. You can edit your question or post anyway.
Please enter a question.
See all 2 answered questions

Send us feedback

How can we make Amazon Customer Reviews better for you?
Let us know here.