AMSOIL Motorcycle Octane Boost (MOB) increases octane for power and efficiency. It is designed to improve startup performance and eliminate engine ping and knock for increased power at low-rpm operation.
Motorcycle Octane Boost is primarily recommended for use in four-stroke air- or liquid-cooled motorcycles manufactured by Harley-Davidson®, Yamaha®, Honda®, Ducati®, BMW®, Triumph® and all other four-stroke motorcycles. It may be used in off-road applications, including ATVs, UTVs and snowmobiles, as an alternative to AMSOIL DOMINATOR® Octane Boost. Note: Clean spills immediately using a clean towel. If left standing, Motorcycle Octane Boost can stain painted or metal surfaces. If cleaned immediately, there is no need for concern.
AMSOIL Motorcycle Octane Boost (MOB) increases octane for power and efficiency. It is designed to improve startup performance and eliminate engine ping and knock for increased power at low-rpm operation. Motorcycle Octane Boost contains detergents that help combustion chambers and fuel delivery systems maintain cleanliness for optimum performance. At the recommended treat rate, it does not harm catalytic converters or oxygen sensors and is compatible with all other AMSOIL fuel additives.
When treated at 1.3 oz. per gallon of fuel, Motorcycle Octane Boost increases the octane of gasoline up to three numbers. Increased octane improves power and can eliminate performance-robbing and potentially damaging engine knock or ping (see below).
Engine knock is especially noticeable in some motorcycles during idle or low-rpm operation and high-temperature driving. Most modern bikes are equipped with sophisticated knock-detection systems that can alter spark timing and the air-to-fuel mixture until knock ceases. Although these systems protect the engine from damage, they can also cause reduced horsepower and poor low-rpm operability. AMSOIL Motorcycle Octane Boost helps reduce the need for knock-detection systems to compensate, ensuring maximum low-rpm power and performance in modern bikes.
Because Motorcycle Octane Boost contains active detergents, it can help maintain efficiency. For clean up, however, AMSOIL recommends treating gasoline with AMSOIL Quickshot®, which contains a greater concentration of cleaning agents.
The tendency of a hydrocarbon fuel, such as gasoline, to knock is measured by its octane number. Lower numbers denote a greater knock tendency; higher numbers denote greater knock control. "Engine knock" is a reference to the sound made from an uncontrolled and early ignition of fuel in the combustion chamber. It causes a knocking or pinging sound, robs the engine of power and can cause catastrophic engine damage. Knock may be eliminated by increasing the fuel's octane.
Research Octane Number (RON), Motor Octane Number (MON) and Anti-Knock Index (AKI) are the three most common octane ratings. AKI, the rating with which most North American motorists are familiar, is typically displayed on gas pumps as the average of the fuel's RON and MON [(R+M)/2]. RON, however, is the most common industry rating. Therefore, AMSOIL uses the RON rating when conducting performance tests and product validation. Gasoline's RON generally is a few numbers higher than the AKI posted on the gas pump (e.g. 87 octane fuel, or regular pump gas, has a RON of about 91-92).
When marketing their products, some additive manufacturers have adopted a points system where 10 points equals one octane number. A claim that an additive increases octane 30 points translates into an increase of three octane
numbers. This approach is often used only to artificially strengthen marketing claims and is not endorsed by AMSOIL.
One 4-oz. bottle of AMSOIL Motorcycle Octane Boost treats four to six gallons of gasoline. Slight overtreatment causes no issues.
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Click here to view the MSDS Data Sheet for AMSOIL MOB.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
Product Name: AMSOIL Motorcycle Octane Boost (MOB)
Current Rating: 4.76 out of 5 stars
Votes & Reviews: 46 vote(s) and 71 user reviews.
Reviewed by Jim: 
Saves me money on fill ups
Reviewed by Anthony:
In my Harley davidson
Reviewed by Tino:
As the title says take it for what is worth. I purchased this for a friend who has a few Harleys. We were talking one day about how the HD brand of octane booster does a good job and he could feel a power increase in his older bike. So we got some of this ordered up. He went on a long trip and was amazed on what it did. Whenever he uses AMSOIL octane booster he gets on average 40-50 miles more per tank by using this. He was a little skeptical the first time and after a few more times, he told me how well it works and with cheap gas. The first order was a couple of bottles and then more and now by the case lol! He especially likes to keep this product on hand for those long trips. He Rates this at 5 stars. Thanks.
Reviewed by Bruce:
On several occasions I have had to refuel with lower octane gasoline and then ride through mountains. The pinging was especially bad and my bike basically lost acceleration. One of my friends suggested your octane boost. I tried and performance back where it should be if not better. I actually believe it is better. Now, I always travel with a bottle on my bike. Great product.
Reviewed by Robert:
Motorcycle octane booster works very well in my Harley
Reviewed by STEPHEN:
Awesome
Reviewed by Mike:
Use in my BMW motorcycle to get extra power.
Reviewed by Chris:
This octane boost is fantastic. My 2013 Road Glide Ultra runs so much smoother, quieter, and more powerfully that it seems to be an entirely different motorcycle. With 91 octane being the highest available in my area, this octane boost has proven to be a wonderful solution to the ping pang ting tang that had made my rides less enjoyable. Thanks Amsoil!
Reviewed by Allan:
Not just those times when you feel the engine sputtering from bad fuel, but also when going on long trips & knowing there may not be Premium available.
Canada
United States
I won t buy this product again
use this in my DD2 go kart but don't see the difference