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Explain to me Fuel Economy last ...

94cruiser

Sustaining Member
259
32
28
Buick Ownership
not yet
Here are my numbers:
Last 25 mil
Average 25.2
Best 48.6

Last 50 mil
Average 21.1
Best 46.6

Last 450 mil
Average 22.7
Best 31.0

How are these calculated?
I do know I did take a highway trip with cruise set at 65 and AC off so I got those great numbers but I don't understand how this is calculated.
 

2007LucerneCXL

Full Member
5,667
1,838
113
Illinois
Buick Ownership
2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
Average is total numbers added together then divided by, basic mathematics. Watch the instant fuel mileage reading between acceleration, constant and deacceleration which may help in the question.
 

Wlepse

Well-known member
1,194
540
113
NNJ
Buick Ownership
2018 Regal TourX Essence
I have questioned these numbers in the past since I don't understand why if my best in the last 25 miles is say 48.6 as yours indicates...how is that not the best for the last 50 or 450?
 

Kybuck83

Member
94
95
18
Orange County, CA
Buick Ownership
2019 Regal TourX Essence
Let me try to explain a different way:

Last 25 Miles
Average = Your average fuel economy for the last 25 miles
Best = Your best ever (or since last reset) fuel economy for a 25 mile distance travelled

Last 50 Miles
Average = Your average fuel economy for the last 50 miles
Best = Your best ever (or since last reset) fuel economy for a 50 mile distance travelled

Last 450 Miles
Average = Your average fuel economy for the last 450 miles
Best = Your best ever (or since last reset) fuel economy for a 450 mile distance travelled
______________________________
 

stasek

New member
12
11
3
Buick Ownership
‘18 TourX Red Needle
Pretty sure the “average” number is just a rolling average for LAST 25/50/450 miles traveled. The “best” is the highest ever recorded for that 25/50/450 interval.

Edit: haha... took me few minutes to write the post. ^^^This^^^
 

Ctrcbob

Well-known member
933
392
63
Buick Ownership
Regal Tour-X
I keep mine set at 50 miles, except when on a trip, I set it to 450 miles.
 
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