It looks as though the Canadian octanes are similar to the U.S. octane. In my area, there is 87, 89, 91 & 93 though I've heard tale of some place selling 94 (I believe that they go in odd numbered incriments of 2.)
A low compression engine (7.5:1) SHOULD be able to run on 87 octane. If you get pre-detonation a.k.a. pinking, pinging, knock, surface ignition, or marbles in the engine; then move upto 89, or higher as necessary. In the U.S. we use a PON (Pump Octane Number) which is the average of both MON (Motor Octane number) and RON (Research Octane Number). PON = (MON+RON)/2 What is a MON and a RON? MON and RON are both actually calculated by the ASTFM. The MON being a value of resitance to pre-detonation under extream conditions (high heat, high pressure, high load). The RON being the value of the same pre-detonation resistance under low-load, low speed, real world driving conditions. The RON number tends to be higher (obviously?). In the U.K. they also use the ASTFM test, but only refer to the RON number on pumps (from what I understand). If you look at the fuel pumps, the next time you go to buy gas you will see that there is a sticker on each pump stating that the octane rating is; pon, mon, ron. What does U.K. Fuel octane equal in U.S. Octane? Well, since the pumps in the U.S. don't tell us what the MON/RON are (it only gives the solution to the equation), all we can say for sure is that U.S. gasoline (PON <-average of the high AND low number) would be nearly equivelant to some higher octane number in the U.K. (RON <- the high number alone). There you have it...Everything you did and didn't want to know about the proof of your (dino) juice. -Terry /// [EMAIL PROTECTED] mailing list /// Send admin requests to [EMAIL PROTECTED] /// or try http://www.team.net/cgi-bin/majorcool /// Archives at http://www.team.net/archive /// Send list postings to [EMAIL PROTECTED] /// Edit your replies! If they include this trailer, they will NOT be sent.
