Sudden Drop in Fuel Mileage

[SuperDave_GPS]

Typical mileage on a full tank of fuel on my '16 RT Ltd is around 350+ Kilometers per full tank (about 220 Miles), regardless whether I run premium fuel or regular.

I haven't checked to see if any codes have been stored, but during both days of this past weekend here in Ontario Canada, my mileage on a full tank has dropped to about 275 Kms per tank.
Tire pressure is confirmed.
It seems to ride fine, other than sucking back more fuel than normal.

I doubt the drop in outside temperature has anything to do with it (temperature only went to about 10 degrees Celsius over the weekend, which is about 50 F), as I never noticed this issue this time last year.

Just wondering if anyone may have some suggestions before I start to go too crazy with looking for things..

Thanks.

 

[ARtraveler]

I do notice a drop in mileage when the weather turns cold. Not sure of the actual causes though.

Another possibility--have your gas station(s) changed over to "winter" blend? That is another cause if we are not considering any actual mechanical issues.

 

[Bfromla]

:agree: Try adding some fuel treatment octane boost at your next tank & :thumbup: good luck

 

[Chupaca]

One more check....

If your air cleraner has not been change in some time or washed if it is washable it will help. Also check if there is anything blocking the air intake....:thumbup:

 

[fatboy]

windy

was it windy out riding into a head wind will kill your mileage

 

[samewok]

winter fuel lest miles

 

[SuperDave_GPS]

Thanks Everyone

Thanks for all your ideas / suggestions, everyone.

Last weekend I did have to replace the left-hand fog light bulb (what a pain in the a$$ that was).
As it was the left-hand side, I did have the air intake in the way, so maybe I may have knocked something out of place while fighting with the light assembly to get it all back together.
As for the filter itself, that was replaced just this past winter, so more than likely it's still good.

Thanks again everyone..

Cheers from Canada.

 

[Bob Denman]

If it's not the air intake...
Temperature most assuredly affects fuel mileage...
As does the introduction of Winter blends for the fuel that you're using
Other factors
Tire pressures
Tire alignment
Belt alignment
weight... :shocked: