My Griso 1100 does a shameful 36.4 miles per UK gallon (c 30.3 miles per US gallon). Whilst the 1100 has an oil cooler, the Griso 850 does not. Does the 1100 really need one in the UK's cool climate? If you're not caning it, is the oil cooler causing it to run on the rich side? Do any Guzzisti live in Washington State where the climate is reputedly similar ie lots of rain?
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GRISO MPG
- Thread starter Aldi
- Start date
SMChris
Tuned and Synch'ed
I admit that I don't know much about engines, and even less about the specifics of Guzzi engines (learning more from this board though, Thanks Todd), but how would an oil cooler cause it to run rich? I could see if the same air used for the oil cooler was going into the intake (warmer, or at a restricted rate), but this is not the case.
Chris
Chris
Aldi wrote:
Yes the oil cooler is beneficial in any climate. It is thermostatically controlled so it isn't impacting your fuel mileage.
Troll the posting on this and the Breva forum. Thermal mastic under the engine temp sensor helps as does having the throttle bodies set up correctly. Graham has posted an excellent thread on the procedure. You must have access to VDSTS or an Axone to perform the TB sync. Also check the procedure here: https://www.guzzitech.com/MGGriso/Manual ... iceMan.pdf
Yes the oil cooler is beneficial in any climate. It is thermostatically controlled so it isn't impacting your fuel mileage.
Troll the posting on this and the Breva forum. Thermal mastic under the engine temp sensor helps as does having the throttle bodies set up correctly. Graham has posted an excellent thread on the procedure. You must have access to VDSTS or an Axone to perform the TB sync. Also check the procedure here: https://www.guzzitech.com/MGGriso/Manual ... iceMan.pdf
NeroGuzzi
Cruisin' Guzzisti
Aldi wrote:
How many miles do you have the bike? MPG will be erratic for at least 1,000 miles and slowly improve. I have about 10,000 miles on my B11 and get slightly better than 40 MPG US.
How many miles do you have the bike? MPG will be erratic for at least 1,000 miles and slowly improve. I have about 10,000 miles on my B11 and get slightly better than 40 MPG US.
My MPG definitely improved after a few thousand miles. Never the less I can still get it well below 40mpg if I'm having too much fun. On the other hand on a sedate ride on Welsh motorways (*) in the company of old classic clunkers I can nearly get as good as 50mpg.
(* Welsh motorways = remote rural single track roads with grass growing thru' the tarmac in the middle)
(* Welsh motorways = remote rural single track roads with grass growing thru' the tarmac in the middle)
Gordon
Tuned and Synch'ed
- Joined
- Nov 23, 2008
- Messages
- 38
On the 8V I get avg 42mpg (UK gallons that is) between fill ups. and am running in.
Did this as a check to see if the on board computer measures in US or UK gallons - and with mid 30s MPG showing then these had to be US gallons.-
Of course with only 500 miles on the clock it is still quite tight and I expect an improvement after a couple of thousand miles.
This is also with a Termi rather than standard silencer.
Cheers
Gordon
PS like Will I also have Ercole but haven't yet moved to Wales.
Did this as a check to see if the on board computer measures in US or UK gallons - and with mid 30s MPG showing then these had to be US gallons.-
Of course with only 500 miles on the clock it is still quite tight and I expect an improvement after a couple of thousand miles.
This is also with a Termi rather than standard silencer.
Cheers
Gordon
PS like Will I also have Ercole but haven't yet moved to Wales.
My Breva11 gets ~45 miles a gallon, my Griso low thirties, it is geared lower, but it is also caned rather fiercely.
NeroGuzzi
Cruisin' Guzzisti
dloftus wrote:
Mine consistently reads 5-8MPG below actual.
Mine consistently reads 5-8MPG below actual.
Brian UK
GT Reference
After the service my Norge dropped from av. 45mpg (US) to mid thirties on the display.
I changed the air filter as the sump had been overfilld. this made a difference, but not enough.
A couple of days ago I finally got round to checking the sync in the throttle bodies with my water manometer.
I found that although they were close at tickover, they were considerably out at 3k, like about 12 inches.
Had to adjust the linkage by about a full turn to get it right. Then reset with VDST.
Went out yesterday, and within a few miles the av. reading was 47 mpg. So a result there.
But then I got stuck in heavy traffic, and it dropped right down. Never improved much thereafter, even though conditions omproved.
But I then flicked it to actual consumption, and found it was reading between 50 and 60mpg (US) most of the time.
Has anyone noticed that the average reading is flawed when the bike is stationary? The computer seems to see fuel being used, but no speed, thus fuel consumption is almost infinite in miles per gallon. Certainly running the bike stationary drops the average reading by up to 1/3 on my bike.
The only real test is the amount of fuel put in to top up the tank over the distance travelled.
And make sure the throttle bodies are mechanically in sync.
I changed the air filter as the sump had been overfilld. this made a difference, but not enough.
A couple of days ago I finally got round to checking the sync in the throttle bodies with my water manometer.
I found that although they were close at tickover, they were considerably out at 3k, like about 12 inches.
Had to adjust the linkage by about a full turn to get it right. Then reset with VDST.
Went out yesterday, and within a few miles the av. reading was 47 mpg. So a result there.
But then I got stuck in heavy traffic, and it dropped right down. Never improved much thereafter, even though conditions omproved.
But I then flicked it to actual consumption, and found it was reading between 50 and 60mpg (US) most of the time.
Has anyone noticed that the average reading is flawed when the bike is stationary? The computer seems to see fuel being used, but no speed, thus fuel consumption is almost infinite in miles per gallon. Certainly running the bike stationary drops the average reading by up to 1/3 on my bike.
The only real test is the amount of fuel put in to top up the tank over the distance travelled.
And make sure the throttle bodies are mechanically in sync.
cyclobutch
Cruisin' Guzzisti
- Joined
- Nov 5, 2008
- Messages
- 119
I must admit I had got a perhaps a little too focused on the instant mpg figures my 'puter was giving, as well as those for overall. These being typically mid 30s. I was figuring that I could be running a two stroke triple from the big K for better than that. I'm not usually that heavy handed, and the bike is a 4v with around 3k miles now.
And then this didn't seem to stack up at the pumps where I was getting around 10 miles per litre, much the same as a Speed Triple and preceding Bandit 12.
Interested that others see what appears to be a significant under reading, after all how far should it be out? But then we see that observation:
"Did this as a check to see if the on board computer measures in US or UK gallons - and with mid 30s MPG showing then these had to be US gallons ..."
Which perhaps explains everything.
And then this didn't seem to stack up at the pumps where I was getting around 10 miles per litre, much the same as a Speed Triple and preceding Bandit 12.
Interested that others see what appears to be a significant under reading, after all how far should it be out? But then we see that observation:
"Did this as a check to see if the on board computer measures in US or UK gallons - and with mid 30s MPG showing then these had to be US gallons ..."
Which perhaps explains everything.
Griso Guy
Cruisin' Guzzisti
On my 07 Griso, I am getting on average US 42.5 with city and highway combo. The most I had acheived was 51.1 going to Yuma Marine Corps Air Station, all highway and at 80mph+.
I get 4.8L per 100klm :huh: . I'll let you smart guys convert that 
Thanks Will, my last measured mpg was indeed on Welsh motorways, including the no-tarmac, loose-shale one over the shoulder of Moel Llanfair (see pic). This sort of going does wonders for the slop in the transmission. Good trail bikes these G11s.............
Thanks, guys. Of the various suggestions put forward to explain poor mpg, my first inclination was to look at Gordon's contention of a mix-up between UK and US gallons.
If Gordon is correct, my reading of 36.4 gallons per mile, if actually US gallons, would translate to about 43.7 UK gallons per mile which fits in, more or less, with results from Cyclobutch, dloftus et al. Over the next few journeys, I'll see how 43.7 compares with actual fuel put into the tank. Of course, whether even 44 mpg or thereabouts should be acceptable in this day and age of dwindling resources is another matter. I used to get high 40s/low 50s out of my Pan ST1100 ten years ago.
Incidentally, you may already be aware that Guzzi made at least one other imperial/metric faux pas - the Owners Book Page 52 says run-in is 930 miles but the Workshop Manual Page 24 says 621 miles. The metric distance given in both Manuals is 1500km which works out on my calculator to 932 miles. Also, the Owners Books calls for 10W60 oil at Page 85 whereas the Workshop Manual calls for 5W40 at Page 26.............. Good init?
If Gordon is correct, my reading of 36.4 gallons per mile, if actually US gallons, would translate to about 43.7 UK gallons per mile which fits in, more or less, with results from Cyclobutch, dloftus et al. Over the next few journeys, I'll see how 43.7 compares with actual fuel put into the tank. Of course, whether even 44 mpg or thereabouts should be acceptable in this day and age of dwindling resources is another matter. I used to get high 40s/low 50s out of my Pan ST1100 ten years ago.
Incidentally, you may already be aware that Guzzi made at least one other imperial/metric faux pas - the Owners Book Page 52 says run-in is 930 miles but the Workshop Manual Page 24 says 621 miles. The metric distance given in both Manuals is 1500km which works out on my calculator to 932 miles. Also, the Owners Books calls for 10W60 oil at Page 85 whereas the Workshop Manual calls for 5W40 at Page 26.............. Good init?
Brian UK
GT Reference
I thought it was fairly universally known that the average fuel consumption readout was calibrated in US gallons. Same on all the 5AM bikes.
It is also the case that the av. on the computer will be way below actual, as measured by fuel used over distance recorded.
This seems to be that when you stop at a road junction or whatever, the computer sees fuel being used, but no distance recorded, so adjusts the average figure accordingly.
If you don't believe me, just look at the average figure, leave the bike idling for a couple of minutes, and look at the av. figure again.
It is also the case that the av. on the computer will be way below actual, as measured by fuel used over distance recorded.
This seems to be that when you stop at a road junction or whatever, the computer sees fuel being used, but no distance recorded, so adjusts the average figure accordingly.
If you don't believe me, just look at the average figure, leave the bike idling for a couple of minutes, and look at the av. figure again.
Sorry, Brian UK, I did not share this knowledge. However, I've been out today and from full tank to full tank over 120 miles got 42.7 miles per UK gallon, according to the pump at the filling station. This does indeed support the view that the computer mpg is measured in US gallons. Unfortunately, I can't tell you what the computer said because the pushbutton no longer scrolls the menu. See my reply in Dickie Bird's "Menu Switch" thread. What a bike!
I hate it when people say " are you sure " :S makes me think i'm telling fibs 
hmy: . I did a few hundred k's yesterday so i'll check and get back to you.
hmy: . I did a few hundred k's yesterday so i'll check and get back to you.Sorry, double d, no offence intended. You didn't tell us how you arrived at 4.8l/100km. If it was by manual calculation, it could involve an error. I know how easy it is to make an error because I converted your consumption wrongly at my first attempt, having read the wrong column in a table of imperial/metric conversions. At least I did the calc for you, as you requested.