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Mixing Fuels

jrocket
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jrocket Proficient

jrocket

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Hi I am new to the skyline scene and i am thinking of getting my own one very soon. I was just wanting to know if you must run ur skyline on PULP such as optimax or can u run it on normal unleaded occasionally. Also can u mix half premium half normal unleaded. Does using normal unleaded f up ur engine. I know that the engine wouldn't perform as well but I just thought that on long trips etc to make it a little cheaper you might be able to mix a little normal unleaded with the premium.

Any info would be muchly appreiciated. :(

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Modena Grand Master

Modena

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Hi I am new to the skyline scene and i am thinking of getting my own one very soon. I was just wanting to know if you must run ur skyline on PULP such as optimax or can u run it on normal unleaded occasionally. Also can u mix half premium half normal unleaded. Does using normal unleaded f up ur engine. I know that the engine wouldn't perform as well but I just thought that on long trips etc to make it a little cheaper you might be able to mix a little normal unleaded with the premium.

Any info would be muchly appreiciated. :(

I wouldnt risk it... for a few missly bucks why would you do it? Itll start pinging and block your injectors eventually.

Stick to 98 RON... I found BP Ultimate works best for my car... fuel lasts longer.

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scathing Grand Master

scathing

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In-tank mixing doesn't actually mix the two fluids very well.

I realise that they should dissolve perfectly into each other, as per what they teach in high school chemistry, but in reality rarely ever homogeneous. Think about when you mix a drink - if you don't stir it forcibly it with some kind of stirrer it doesn't actually mix homogenously. Even shaking your drink around doesn't really get it to taste the same from start to beginning, so driving the car like you're a racer trying to warm up their slicks isn't going to do the job.

So unless you want to install a giant stirrer into your fuel tank and sit there like a witch working her cauldron every time you fill up, its not going to work.

Especially over something as measely as 10c/L (between 98RON and regular ULP).

If the quality and properties of the fuel coming down the lines is changing every few minutes, I don't think most ECUs are fast enough to cope. Which means your car might run rich one minute, and then lean the next.

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