100 octane fuel?

[Slipperyeel]

Right. Today something interesting happened. Actually, it's confirmation of what is noticed on the way down.

I'm on my way back from Italy. Filed up in Turin with 100 octane fuel (yes, 5% alcohol). I've got to Bühl - just south of Baden Baden on one tank - 572km. I'm two up with full luggage!

On the way down, I filled up in Basel, got to the Italian stop - Turin with 1/4 tank left.

Each time I'm going over the gran San Bernardino pass, not through its tunnel, so definitely not the most fuel efficient choice!

Anyone else getting this kind of mileage on this fuel? I always had to fill up on these same journey stops. And I'm doing around 130-135 average where I can, except CH of course.



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[TLSgazza]

I always get much better fuel consumption when touring especially in the mountains. It is a bit strange but I guess even though you spend a lot of time in lower gears excelerating etc there is the plus side going back down the mountains with very little throttle.
The most I've done on a tankful was 467 miles. From the Austrian Alps to the black forest then the vosgues in France. It was on vapours I think when I found a fuel station as I put in 36.5 litres.
The lower speeds help as well because I once used a tank in 280 miles banging out some motorway through Germany just to cover some ground. They don't like running at a constant 90+ mph. This equates to a difference of over 180 miles on the tank range.
Riding locally and commuting to work I get 300-340 miles usually from a tankful. It's always over 400 when I'm touring in Europe. A good 2-3 miles per liter more.

 

[Slipperyeel]

I always get much better fuel consumption when touring especially in the mountains. It is a bit strange but I guess even though you spend a lot of time in lower gears excelerating etc there is the plus side going back down the mountains with very little throttle.
The most I've done on a tankful was 467 miles. From the Austrian Alps to the black forest then the vosgues in France. It was on vapours I think when I found a fuel station as I put in 36.5 litres.
The lower speeds help as well because I once used a tank in 280 miles banging out some motorway through Germany just to cover some ground. They don't like running at a constant 90+ mph. This equates to a difference of over 180 miles on the tank range.
Riding locally and commuting to work I get 300-340 miles usually from a tankful. It's always over 400 when I'm touring in Europe. A good 2-3 miles per liter more.

Now back home with my boy - in quarantine. He thinks he's on holiday, it's gonna be a working holiday, at home

Fuel consumption was back to 'normal' on the run back from S Germany. You're right about all the downhill stuff conserving some fuel, I'd forgotten about that.

On the way down I left with a full tank. Then only stopped twice to fill up in a total of about 1150 miles. In practice it took 2 and 2/3 tanks to get down. It took 3 to get back. Which I guess makes sense since I was 2 up coming back. Don't forget I had the 100 miles to the tunnel in biblical rain, so it wasn't all ready going on the consumption.

But it always took more. Which is partly why I posted. So what's changed? I can only think of 2 things - fully serviced suspension and CTA 2s (I ran at 38/42).

Maybe I've slowed a little?

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[botus]

ride slow they do mega MPG, maybe you had a stiff tail wind too

 

[Slipperyeel]

ride slow they do mega MPG, maybe you had a stiff tail wind too

That's what I'm beginning to think...and it might have an impact on my riding these longer distances...

Keeping in mind I'm usually solo, I've tended to get it on and occasionally even see what I can get out off it. Which is fun, but I'm so impressed with the mileage impact of winding it all back a fraction, I'm happy to change my ways! And it is clearly just a fraction, because I was hardly trundling along at 60!



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[botus]

without being suicidal 42mpg is normal when getting on with it, 56mpg is going slow (you could / should be doing it on a 250cc....) stay on <20% throttle and never go above 3500 rpm the mpg change is massive...

its the first bike where I noticed low revs makes a considerable difference on mpg

 

[Slipperyeel]

without being suicidal 42mpg is normal when getting on with it, 56mpg is going slow (you could / should be doing it on a 250cc....) stay on <20% throttle and never go above 3500 rpm the mpg change is massive...

its the first bike where I noticed low revs makes a considerable difference on mpg

I haven't got the calculator out, but if I'm to believe the dash computer, it was often reading over 50mpg and I didn't think I was going 'slow'...

I use Live Track when I'm on these journeys so family can track me. Looking at that it says the total average speed - coming back from Germany - was 46mph! But when you click on the mile markers, I was mostly at 75mph, give or take 5mph either way. So the traffic jams clearly pull down that average a lot!

I'm still impressed with the mpg.

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