The only difference is that one has a higher amount of octane than the other does. Premium fuel has more octane than regular fuel, making it more resistant to pre-detonation caused by compression in the engine. Regular fuel has less octane and a lower octane rating.
The reduced octane content in regular fuel means it is more prone to premature ignition. Premature ignition, also called pre-detonation, occurs when the air-fuel mixture in your engine starts to burn before it should.
Ideally, the fuel should burn only when the spark plug produces a timed spark in the engine. However, other elements in your engine can cause the fuel to ignite ahead of time. If the fuel in your engine starts burning, early engine components, such as the pistons, will be affected severely.
Piston rings, ring lands, and big end bearings may also suffer substantial damage in the process. Pre-detonation causes increased engine pressure, which in turn raises the resistance in the engine. High resistance causes the temperatures in your engine to rise.
Excess heat in the engine will affect the metal components in the engine and cause them to wear out faster. The large V-Twin engines used in most Harley motorcycles are more prone to premature ignition than other motorcycle engines. V-Twin engines have higher compression rates and produce enormous heat and pressure. These two elements can detonate the fuel in the engine before a timed spark occurs. Premium fuel prevents detonation in high-compression engines, which makes it the best fuel to use on your Harley.
Apart from preventing early ignition, premium fuel does not offer any more benefits than regular unleaded fuel. Some people claim that premium fuel will increase horsepower or lead to increased fuel savings, but experts have debunked these claims.
Yes, premium fuel may allow for some gains in performance or fuel economy. These gains are, however, too negligible to justify deciding to spend more on premium fuel. Some companies also say that premium fuel contains extra additives that prevent dirt from building up in the engine. However, this is not true as all fuel types [both regular and premium] have additives that remove dirt from fuel.
The only reason why your Harley bike needs premium fuel is that its design makes it susceptible to pre-ignition. Pre-ignition will cause your Harley engine to knock, leading to further damage.
However, much of the evidence of the facts to support this theory is mostly anecdotal and unverified. Premium fuel will only bump up performance numbers if the manufacturer made the engine run on premium. High-performance engines like those in sportbikes run better on premium fuel and may get some performance gains from using higher-octane fuel.
With your Harley [which is not a sports bike], premium fuel will do nothing to increase the torque or horsepower available to you. It will only allow the motorcycle to achieve its intended level of performance.
Using regular fuel when your Harley calls for premium fuel will affect its performance and fuel efficiency. Premium fuel contains detergent additives that remove carbon deposits from the engine. Regular gas has detergent additives too, but the concentration is lesser than that found in premium gas.
The problem is, there are cheaper ways to keep your engine clean. Products like fuel system cleaners can help rid your engine of carbon buildups and the likes. Fuel system cleaners are over-the-counter additives that you can buy at any spare parts shop. They improve overall performance [deposit buildups affect performance] and are viable alternatives to purchasing premium fuel every time.
Conducting regular maintenance is another cheap and more effective way to ensure your engine is always clean. Even if you use premium fuel, carbon may still build up on engine components. Ben Davis February 13, What kind of gas should I run in my Harley Davidson? What octane gas should I use in my motorcycle? Is non ethanol good for Harley Davidson? Can you put 87 in a motorcycle?
Should you put premium gas in your motorcycle? Will octane hurt my motorcycle? Can I use octane in my motorcycle? Can you run octane in a Harley? Does high octane gas increase horsepower? Will 93 octane increase HP?
Can higher octane hurt your engine? What happens if you put 87 octane in a 93 octane car? Does a Lexus need premium gas? Does Lexus IS require premium gas? Using higher octane fuel will reduce premature combustion. It still varies from engine to engine, however. Many Harley owners have ran 87 octane in their Twin Cam bikes without pinging, and have gotten a lot of years out of their motorcycles.
But some have had to stick with higher octane to keep it humming smoothly. If you want to take advantage of the lower cost of 87 octane gas in your Twin Cam, try using a couple of tank fulls and play it by ear. Contact Us.
Willie K: American Made options at a reasonable price. Whats not to like Many Harley-Davidson owners have asked if they can use 87 octane gas in their motorcycles.
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