high octane fuel question

[Humvee21]

I am not 100% sure, but this is just my opinion/beliefs. The higher the octane is, the better it is. Therefore, as long as you do not put a lower octane than manufacture requirements then you will be fine with no programming changes. However, octane measurements between the US and Europe are measured differently. This means that we could have 87 octane in the US and have 87 octane in Europe, but both are completely different since it is measured differently. Do some research on octane measurements in Europe and see how it compares. Hope I helped some

[RenegadeX]

What you need to do is add a supercharger!

Higher octane just prevents premature detonation (knocking). You need it on high compression engines, supercharger equipped, etc. Your engine is not. You can use it without a problem.

Contrary to popular belief, higher octane is not high performance.

[Dave92270]

Thanks guys,

Sounds like I'm going to be just fine with 95 octane without any modifications, but next time I'll speak with the shop which did EU conversion for me I'll ask them about this.

So far, the engine seems to run exactly the same as it did back in the US on 87 octane.

[fourfourto]

According to wikipedia,
RON is always about 4 to 5 points higher than the equivalent PON (Pump Octane number = AKI):


USA (AKI/PON) --- Europe (RON)

87 = 91
89 = 93
91 = 95
93 = 98

[Dave92270]

Originally Posted by fourfourto

According to wikipedia,
RON is always about 4 to 5 points higher than the equivalent PON (Pump Octane number = AKI):


USA (AKI/PON) --- Europe (RON)

87 = 91
89 = 93
91 = 95
93 = 98

Thanks. That is interesting, I guess there is not much to worry about then.

[wpage]

You could see some benefit from a tune. Timing is important with a hotter burn in you cylinder. Probably not a issue of damage but performance improvement to take advantage of a higher burn rate in combustion...

Good luck in your venue!