Regular premium gasoline

[AZRider]

My Owners Manual on page 69 says a Trophy takes (R+M/2) of 87 or higher octane.  On page 169 under Specifications, it says the bike takes 91 RON unleaded.  Isn't 91 RON premium?  What am I missing here?   

[Coconut]

Hi AZRider,

You have spotted another of Triumph's anomolies in one of their Trophy Publications !

The UK / European versions of the Owners Handbook
make NO reference to R+M/2, because this is a US Specification.

From Wikipedia :

In most countries in Europe (also in Australia, Pakistan and New Zealand) the "headline"
octane rating shown on the pump is the RON, but in Canada, the United States, Brazil,
and some other countries, the headline number is the simple mean or average
of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2.

What I think Triumph should have done is to include the same Rating version on both pages,
instead of mixing the two, and putting the Euro Rating on Page 169, or at least incude an
explanatory note, although it is technically correct, as it could easily lead to confusion ! 

Here's a chart showing that 87 R+M/2 is the same as EURO 91 RON :



As you can see 91 R+M/2 is equivalent to Euro 95 RON,
which is not a Premium grade of fuel in the UK / Europe,
but is the normally available standard Unleaded fuel,
and which the Trophy runs well on.

If you were to "mistakenly" put 91 R+M/2 Grade fuel in the tank,
it would be the equivalent of the 95 RON that we generally use here in the UK.

This could explain previous Topics where US Trophy owners have said they use "Premium"
Fuel in their Trohy with good results, and may have been using 91 R+M/2 in the mistake belief
that it is a Premium Grade of fuel.

I'm amazed no-one has spotted this before, and I would be grateful if you could provide the exact
wording on your Page 69, together with the Publication Number from the "Foreward" on Page 4,
so that I can add the details to this Topic :
Owners, Audio, and Service Handbooks + Service Manual errata

Cheers 



 

[trophied]

That information is on page 70 and 171 of my 2013 with version 1 of the handbook.  And it lists 87 or HIGHER on page 70, but page 171 only specifies 91 RON.  I think some of the confusion comes from the different methods of rating fuel, but to be accurate page 171 should list it as 91 or higher RON.

[Coconut]

That's 87 or higher US, equivalent to 91 or higher Euro / UK ! 

They don't make it easy do they ?!

[AZRider]

Coconut - here's the exact wording on page 69 of my 2013 manual:  Fuel Requirement/Refueling.   Fuel Grade.   The Triumph motorcycle is designed to run on unleaded gasoline with a CLC or AKI octane rating (R+M/2) of 87 or higher.  Federal regulations require that pumps delivering unleaded gasoline are marked 'UNLEADED' and that the Cost of Living Council (CLO or Anti-Knock Index (AKI) octane rating is also displayed.  These ratings are an average of the Research Octane Number (RON) and the Motor Octane Number (MON).

Hope that helps. 

[PhilInAthens]

Just to mention, my TTSE does not run well on 87 'regular' (it knocks under load) and so I have found that I need to run at least 89 'plus'. However, to consistently avoid knock I must run 92 'premium'.  This is especially true in the warmer months when, here in Georgia, the refiners switch to "summer blends" ostensibly to reduce smog.

[digital]

These are the laTrophy's engine calibrations:

[bobv07662]

Just my 2 cents on my experience with fuel. My 2014 Trophy pings in the summer on USA regular. Changing up to mid-grade cures the problem. Never tried premium. Bike usually goes 310-320 highway miles per tank.