Oil's ok

check to see if you knocked off the vac hose or something

You can think anything you want to, but the oil did not cause that change in mpg,.....trust me.

If you really did have a drop from 55 to 40,....on the same bike,....under all the same conditions, you have a serious problem,......trust me on that too !

It is easy for one bike and rider to get 40, and another bike and rider to get 55. But you can bet your last $ it won't be under the all the same conditions.

 
If you do mileage calculations, be careful to record both the miles that you get and the fuel you put in -- expect variations due to road and wrist action.

I actually wrote a spreadsheet to do mine for me, just plug in the two numbers for this fill up and it would calculate the miles ridden from the last fill up and apply the gasoline needed to get to a full tank (gas used) for this same period.

I learned a lot about my own personal "road and wrist" and the resulting gas mileage that I get varies a lot according to where I am going and how fast I want to get there.   I am the major cause of variation.   Your 10 mpg change that you are chasing falls easily within my personal road and wrist range of variation.

I bet the gas mileage variation you have seen is the same thing, unless (like Verslagen said) your vac petcock is misbehaving on you again.


   He put some racin' oil in his bike, whut did you think he did wid his wrist?

 
Jassi, are you still there buddy?


Just pick up one foot and move it off the land mine, then wait a few minutes and gently move the other one.

If it ain't blowed up into an oil war yet, it ain't ever gonna do it.  

Folks is being nice fer the Thanksgiving season.

Type something so we know you are still there ....

I buy my 92 octane (no ethenol) five gal at a time. I fill up at home and measure the amount it takes . I usually get 55 to 60 mpg. I do not beleive that the oil makes that much difference. good luck.

 
Justin, the wise older list member waits patently until page #7 of a 6 page long shifting symptom witch hunt before he calls bovine droppings on it ....

He also looks at the last 25 posts from the poster to see if he has any other existence beyond the symptomatic thread.

In this case, let the boy gently step off the land mine and escape with his pants legs (and feet) intact.   He is a newbie who posts in the same manner on other threads.    He just happened to ask an interesting question on a potentially sore topic.

Yes, I think he saw a 10-15 mph variance from normal -- but I can churn out a 20 mpg difference at will from when I am slow cruising in 5th gear near the speed limit to when I am playing "mountain roads" with the Dragon crew.

And who knows, mebbe his Mobile 1 stuff actually got changed recently -- who knows with Mobil any more since they jerked out the ZDDP and partially replaced it with micron fine moly powder and Teflon ......

And he never did say what he used for oil previously.

Justin, I appreciate your lowered expectations of me. I was getting so tired of being perfect. Happy Thanksgiving, you old coot.