The difference between octane 95 and 98


We’re at the BP laboratory. People ask us how BP Ultimate
fuel works, including the octane number. I want to explain a number of
things for different types of cars. The octane number is a number to
measure how well the fuel burns. It’s not the octane level. Many people think it is,
but it’s not. It’s only there for measurements. This is a reference engine to measure the octane
number. It has 2 fuel systems, so we can switch from 96 octane to 102 octane. You’ll hear
a difference. The knocking sound is a good thing. I thought it wasn’t, but the combustion is optimal.
When it gets louder, your engine will wear. Not after 3 minutes, but after hours of
driving your piston could look like this. The fun thing is, he now adjusts the engine’s
compression so it’s optimized for 102 octane. If we reduce the fuel feed to 96, you her a very loud
knocking. The lab man got anxious. This isn’t right. You shouldn’t do this for too long,
so he quickly turns it right. Now you see that adjusting
to the octane number has its uses. Back to the cars. Let’s start with
the A-Class; the Mercedes-AMG A45. It has a 355 hp 2-liter engine
with a whopper of a turbo. 178 hp per liter. This means
it’s a very stressed engine. We used to have naturally aspirated 2-liter
engines without turbos. 148 hp was a lot. This means conditions within
this engine are extreme. Fuel with a higher octane level helps
to keep the combustion very precise. The engine wants that the fuel burns at the right
moment, not spontaneous a millisecond off. This is bad for the performance and the engine
itself. This goes for normal cars as well. There are a lot of 1-liter 3-cylinder engines
at other brands. The same principle works here. The engines are relatively stressed. This means
that a quality fuel makes for better combustion. You’re probably wondering why we have a GT-R.
Because it’s a cool car with 542 hp. You know that. Something specific
about this car makes it unique. This car wants a minimum of 98 octane
in its tank. 100 or more is recommended. If you don’t do that, it won’t reach its full power. This is specific to the GT-R,
but it translates to other cars as well. Those preform better with fuel such as
BP Ultimate with an octane number of 98. For the GT-R you have to select the best
fuel you can find to get the 542 hp. We’re going inside, where there are more cars.
I don’t know which, so let’s find out. This is a fun car with its BP Ultimate decals.
A nice Audi A8 with a V8. This means it has 2 cylinder banks. It’s a “V”, 4 on
either side. This special car has 2 fuel systems. There are 2 fuel tanks, 2 fuel lines,
2 different injectors, etc. The one cylinder bank runs on regular
gasoline and the other on BP Ultimate. This car has 2 cameras looking inside the engine as
well. Here we see the engine valves. I’m switching it. This may be alarming, because this
is on regular fuel. It’s disgusting. This has an impact on consumption, performance
and how the car feels (vibrations, acceleration). We can’t give a percentage, so we can’t say there’s
10% more hp or a 20% lower consumption, but you can say these aren’t ideal conditions
for a modern engine to work in. I’m switching back so we can see
what it SHOULD look like. For those who like classic cars, don’t start crying.
This Jaguar E-Type has a gaping hole in its hood. On the one hand it’s a shame, on the other hand we
can show that BP Ultimate also works for older cars. I don’t know the build date, but it’s older than
I am. We didn’t have these fancy fuels back then. In older engines you see the cleansing effect. An additional advantage to BP Ultimate is that the
fuel doesn’t contain ethanol. Ethanol attracts water. You don’t drive a classic car on
a daily base, not even weekly. It could be a problem when water gets in the fuel. BP Ultimate doesn’t contain ethanol,
which is better for your classic car. Subtitles – Maru’s Text Support

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