I have been running 91 octane, but now I see that 94 octane is available at Husky(Canada). Anyone try 94 and notice any difference?

 

We have Octane 95 and 98 here. I am running only 98 now. But with my last car, when I switched to 95, mileage was worse (but cost/km was not that different) and there was a distinct loss of power.

 

It might be worth including which system of octane ratings are being used in each of your county as you post, since some countries use different rating systems which results in slightly higher or lower numbers for the same level fuel. You might want to check on the pump and see if it is RON method or the other one, which can help us compare them.

I know the system in Europe uses a different one than in the US, and I don't know which is used in Canada or Singapore....

The one I fill up with here in the US is 93 since 91 is marked as the minimum required on the car, and we don't have 91 in our area.

(I need to look at the pump also next time I fill up)

 

US uses the R+M/2 method to calculate octane rating.



Standard USA octane available are 87, 89, 93.

Some stations have 91 octane, and a few even have 100+ octane race fuel.


BMW owners in the USA have a simple choice, however. Just get 93... it's usually the only option above the minimum 91.

 

RON system here in Singapore

 

I've been running the 94 Octane Husky fuel for about eight months now. In my E39, I found the car responded better and that I got better mileage. It is too early to tell in my E60 as I only have 2400 km on the clock, just broken in. I have had a tank or two of 91 octane and it is my perception that the car runs better with the 94.

I did check with the dealer and the 10% ethanol is OK in the 3.0 l engines. I don't know if the same can be said for the 4.5l.

 

Except California (and maybe elsewhere that uses the same CFG standard?) which has 91 instead of 93. We use to have 92 but the common carrier pipeline and a dispute over royalty payments for the technology to make that one point boost ended that. We do have 100 racing fuel (unleaded) but it's over $5/gal.

 

I put in either 92 or 94 (Chevron usually) depending on the price the day of fill up. I have never noticed any difference that I can quantify but nevertheless, I believe 94 is better for the car. Car runs great no matter.

 

That's because California always has to be different.

 

Sunoco Ultra 94. Where can i get 100+ octane in the NYC area at the Racetrack (Englishtown maybe)?