Competition Averages

[rh77]

Background: Brucepick brought-up an excellent point:

The baseline and final averages are taken by averaging the MPG value in the GasLog. In this form, a cumulative value of total miles/kilometers, vs. total gallons is not taken.

A cumulative average seems to be more fair and accurate.

Vote:

1) Keep the Current System
2) Implement the total/cumulative average for the Cycle

This is a public vote. Please provide reasoning for your input. Thanks all!

The Commish

[MnFocus]

Cumulative. Maybe subdivide per quarter so as to see trends by season ?

[skewbe]

I know I'm not playing, but if I understand correctly, the current situation: One tank may have only 3 gallons of "extra good behavior" then that tank would have the same weight as a 15 gallon tank of low mpg?

[rh77]

Originally Posted by skewbe

I know I'm not playing, but if I understand correctly, the current situation: One tank may have only 3 gallons of "extra good behavior" then that tank would have the same weight as a 15 gallon tank of low mpg?

Yup...

[CO ZX2]

rh77, Rick,

Guess I'm not understanding this very well. How does the proposed new rule differ from the currently posted Version 2.0 rule quoted below??

Excerpt from current Version 2.0 rules:

Calculations:
6. The ?Final Percentage over EPA? is figured by the cumulative, Gaslog-sourced MPG values vs. the vehicle?s EPA FE-Combined (?Cycle-End Cumulative Percentage Over EPA?)

7. A member?s final calculation is the difference between the Baseline and Cycle-End Cumulative? or ?Improvement? (negative numbers reflect a decrease in efficiency).

[brucepick]

Originally Posted by CO ZX2

rh77, Rick,
Guess I'm not understanding this very well. How does the proposed new rule differ from the currently posted Version 2.0 rule quoted below??

Excerpt from current Version 2.0 rules:

Calculations:
6. The ?Final Percentage over EPA? is figured by the cumulative, Gaslog-sourced MPG values vs. the vehicle?s EPA FE-Combined (?Cycle-End Cumulative Percentage Over EPA?) ...

If I may be so bold as to answer this one...

Actually I don't think the proposed method does vary from #6 above (my interpretation of it anyway). I think the method of averaging all the mpg values from the gaslog doesn't really reflect #6 as it weights the miles in a short tank much more heavily than those in a long tank.

I think it's a matter of us agreeing on what was the intention of the rule, and stating it clearly so there won't be a question on it.

My two cents.
My thanks to Rick and to all of us for following this.

[thisisntjared]

man just as i expected, nobody voted for the average of mpgs. good.

i thought that they were the cumulative and the cumulative

[LxMike]

I don't think a rules change in mid "season" is right. with the mileage that some get here they would only get 1 fill and it would get posted near end of cycle.

[rh77]

Originally Posted by LxMike

I don't think a rules change in mid "season" is right. with the mileage that some get here they would only get 1 fill and it would get posted near end of cycle.

For the season, single-fills wouldn't be affected. It's when multiple tanks are used:

Example:

Tank 1: 400 mi / 15 gal = 26.67 MPG
Tank 2: 350 mi / 13 gal = 26.92 MPG
Tank 3: 100 mi / 3 gal = 33.33 MPG

The current method takes the MPG averages: (26.67 + 26.92 + 33.33) / 3 = 28.97 final MPG

Proposed "cumulative" method: 850 miles / 31 gal = 27.41 MPG

The newer method weights each "gallon" equally as Bruce just mentioned.

Baselines would be calculated similarly...

-Rick

[thisisntjared]

i dont know about you, but i commute all year round... there is no mpg season.

if anything the winter is the mpg season because i cant race and my wife(teacher) is commuting daily again.