Diesel Power vs. Hybrid

  • Thread starter Thread starter Joey D
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Canada is reducing the amount of sulphur that will be allowed in diesel starting this year ...

The reason why Europe's fuel is rated so high is because Europe only uses the RON rating whereas North America uses the average of the RON rating and the MON rating (RON+MON)/2 ...

RON tests a fuel's ability to avoid knocking at low engine speeds under a light load (higher = more resistant) ...
MON tests a fuel's ability to avoid knocking at high engine speeds under a heavy load (higher = more resistant) ...

The tests are peformed against a mixture of pure iso-Octane and Heptane with the octane number expressing the percentage of iso-Octane in the mix (i.e. 90 Octane fuel has the same knock resistance as a pure chemical mixture of 90% iso-Octane and 10% Heptane)

RON should always be higher than MON ...

87 Octane Fuel in North America has a RON rating of about 91, but a MON rating of only about 83 ...

European 95 octane petrol has a RON rating of 95, but a MON rating 85, making it equal to ~90 octane by North American standards ...
 
Jmac279
The reason why Europe's fuel is rated so high is because Europe only uses the RON rating whereas North America uses the average of the RON rating and the MON rating (RON+MON)/2 ...

RON tests a fuel's ability to avoid knocking at low engine speeds under a light load (higher = more resistant) ...
MON tests a fuel's ability to avoid knocking at high engine speeds under a heavy load (higher = more resistant) ...

The tests are peformed against a mixture of pure iso-Octane and Heptane with the octane number expressing the percentage of iso-Octane in the mix (i.e. 90 Octane fuel has the same knock resistance as a pure chemical mixture of 90% iso-Octane and 10% Heptane)

RON should always be higher than MON ...

87 Octane Fuel in North America has a RON rating of about 91, but a MON rating of only about 83 ...

European 95 octane petrol has a RON rating of 95, but a MON rating 85, making it equal to ~90 octane by North American standards ...
Click to expand...


Thanks. I had already posted basically the same thing a couple times before, and was going to dig it up again, but you saved me the trouble.


European 91 = North American 85
European 93 = North American 87
European 95 = North American 89
European 98 = North American 91-92

Many North American fuel stations also carry (R+M)/2 93 and 94 octane gasoline, which is roughly 100 RON.

Racing gasoline is also sold in the US, with (R+M)/2 octane ratings of 100-116 (or, in terms of RON, roughly 105-125). European racing gasoline, that is to say the stuff certified by the FIA, is only 95.5 octane (R+M)/2.
 
It should be noted than any Octane Number above 100 means that it has X% greater resistance to knocking than 100% iso-Octane ...

i.e. 110 RON means that it has 10% higher tolerance than pure iso-Octane in the RON test ...
 

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