Do you have something to add? Greenhouse gas (GHG) reductions – Many large manufacturers are taxed for their greenhouse gas emissions. Which means high octane fuel does have it's use and is not a scam. Don't know if this is done in 20 miles or one tank.Conventional advice is to use lowest octane that the engine will run on without knocking. High octane fuel isn`t the same as normal octane fuel. As high-compression engines are designed to work with higher octane ratings, fuel economy will remain the same at the very least, and could even improve slightly.If you're worried about the cost of high-octane fuel, there's probably nothing stopping you from still using regular petrol, but like a diesel, your car will benefit greatly if you stick a tankful of high octane fuel in it every now and again.Energy firms want the right to switch off electric cars charging at home,How green are electric cars? Higher Octane Doesn’t Mean Higher Quality. So if the area is made smaller (compressed) the pressure and temp goes up every time. Do you disagree?
The best performance will come with the highest ignition advance BEFORE the onset of knock.
In most cases it will result in rough running, although in the worst-case scenario there is the potential for engine failure if you use low octane fuel regularly.At the other end of the spectrum, some high-performance cars may suffer from knock when using regular 95 octane fuel. Which octane level is required for a particular engine is determined by its.There are different number systems that are used to indicate the octane rating of fuel. Regular petrol in the USA has an octane rating of 87, whereas high octane has a rating in between 88 and 100. With a blending octane rating of 114, ethanol is the cleanest and most affordable source of octane on the planet. If your car needs high octane fuel, it will be noted in the owner's manual, while most cars have a label on the inside of the fuel filler flap which shows what kind of fuel you can use.Because diesel engines don't ignite fuel to create power (fuel is added to the air that is compressed instead), premium diesel doesn't usually feature a higher octane rating. -- which is partly correct. If the engine is functioning properly, then using a high octane fuel typically will not improve its performance, although some special types of high octane fuel can improve an engine's.Everyone note this: Total compression is what matters, not ratio. For best performance, use the fuel recommended in your vehicle owner’s manual. That's because the engines in performance cars can feature a high compression ratio - the difference in size of the combustion chamber between the cylinder's lowest and highest points. Running the maximum ignition timing extracts the maximum power and efficiency. Basically the sensor calculates temp drop of a heated wire from airflow and converts to engine load. ","This artical is wrong as modern engines run knock sensors and are designed to operate just under the knock ignition timing. This fuel prevents knocking sound from your vehicle and hence increases the life of the engine and makes your drive smoother. As a result, these engines will need a higher octane-rated fuel to work effectively.
The RON and MON values are also measured at differnt engine speeds. Butane has a high blending octane value which helps manufacturers hit their octane targets. In fact an engine's need for octane is determined by these three basic factors:- Pressure (the pressure inside the engine, which is determined by the ambient outside air pressure, the engine's compression ratio, and -- if installed -- the increased pressure produced by a turbo-charger). Engine makers normally design their engines to operate at or near sea level, and some (including Nissan) acknowledge that at higher elevations lower octane gasoline is acceptable. Premium Unleaded (95 RON)
For many people just the thought of having to buy higher octane fuel would turn them off of the vehicle.
(Tests indicate that this elevation effect varies between 0.8 and 1.2 octane and averages about 1.0 octane). The main downfall of butane is that it boils at 32°F.