For ppl in Canada

[RockerGuy]

Hey guys,
Do u guys know what our gas station measure our Octane rating by? I think there is 2 methods, Motor and Research. There is also an average of the 2. Its denoted by (R+M)/2. I want to know which is used in the Toronto region.

Cheers

[Louis]

I found this on Google on Petro-Canada's website

To determine your vehicle's octane requirement, look at the manufacturer's recommendation in your owner's manual. Most auto manufacturers recommend 87 octane gasoline, as measured by the (R + M) / 2[link question #54] method on a test engine under defined operating conditions. If the vehicle knocks on the recommended grade, a higher octane grade should be selected. Some foreign vehicle manuals recommend a Research Octane Number (RON) instead of the more common octane rating that appears on most gasoline pumps. As a rule, the recommended octane rating can be determined by subtracting four (4) from the recommended RON number. A vehicle that calls for "91 RON" should use 87 octane gasoline (as measured by the (R + M) / 2 method). Using a higher grade than is required will not usually increase performance. However, if the vehicle is equipped with knock sensors, as many late model vehicles are, a higher octane grade may enhance performance.

[Louis]

http://en.wikipedia.org/wiki/Hydrogen_station#Octane

[RockerGuy]

Thanks for the info, that was very informative. So my bike uses 87 oct. and I was using 91. I think if I use 91 it will just lead to accumulation of carbon, would it?

[Clint]

Doesn't it say right on the pump? Ours do.

[Louis]

The pums only mention the octane, not if it's RON or MON or (R+M)/2 (which is probably what it is). My manual says to use 91 or higher for RON but the following paragraph for Canada says to use 87 (R+M)/2. I use plain old regular which is almost 89 everywhere.

[hammersfan]

(R+M)/2. In the GTA . It says so on the pumps at the sunoco stations at least.