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1974 FIAT X1/9 Centurion Full Race DNA Gas Mileage (Centurion) - EcoModder.com

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Fuel log graph
Efficiency log for: Centurion - 1974 FIAT X1/9 Centurion Full Race DNA
  • Lifetime Fuel Economy: 125.2 mpg (US), 1.9 L/100 km, 150.4 mpg (Imp)
  • 90-day Fuel Economy: no fills in past 90 days
  • 3-tank Fuel Economy: 143.5 mpg (US), 1.6 L/100 km, 172.3 mpg (Imp)
  • EPA Combined Rating / % over rating: 0 mpg (US) / 0% (based on 90-day fuel economy)
  • Total fills: 17
  • Total fuel used: 33.8 gal (US), 127.9 L
  • Total distance traveled: 4231.5 mi. / 6810 km
  • Average tank distance: 248.9 mi. / 400.6 km
Fill date Distance Fill amount Price Fuel Economy Details
2015-08-02 357 mi
574.54 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
178.5 mpg (US)
213.77 mpg (Imp)
1.32 L/100 km
0.56 gal (US)/100 mi
188.8 Wh/mi
Centurion: “From Colton, NY and back on a two-gallon tank”

23rd Annual Fort Ticonderoga Car Show Ticonderoga, NY

357 miles round-trip!

All driving was at legal posted speed limits - running with traffic.

8/2/2015
2015-07-25 194 mi
312.21 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
97 mpg (US)
116.17 mpg (Imp)
2.42 L/100 km
1.03 gal (US)/100 mi
347.42 Wh/mi
Centurion: “From Colton, NY and back on a two-gallon tank”

Inlet Classic Cruise & Show
Inlet, NY

194 miles round-trip!

All driving was at legal posted speed limits - running with traffic.

7/25/2015
2015-07-12 310 mi
498.9 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
155 mpg (US)
185.63 mpg (Imp)
1.52 L/100 km
0.65 gal (US)/100 mi
217.42 Wh/mi
Centurion: “From Colton, NY and back on a two-gallon tank”

125th Anniversary - Curtis Lumber Car Show
Ballston Spa, NY

310 miles round-trip!

All driving was at legal posted speed limits - running with traffic.

7/12/2015
2015-06-18 282 mi
453.84 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
141 mpg (US)
168.86 mpg (Imp)
1.67 L/100 km
0.71 gal (US)/100 mi
239.01 Wh/mi
Centurion: “From Colton, NY and back on a two-gallon tank”
Syracuse Nationals – NYS Fairgrounds
Syracuse, NY

282 miles round-trip!

All driving was at legal posted speed limits - running with traffic.
6/18/2015
2013-04-10 196 mi
315.43 km
1.41 gal (US)
1.17 gal (Imp)
5.34 L
47.52 kWh
139.01 mpg (US)
167.52 mpg (Imp)
1.69 L/100 km
0.72 gal (US)/100 mi
242.45 Wh/mi
Ditch Vectors and adapters.

Install Carroll Shelby Scorpions from original Centurion.
2013-04-06 200 mi
321.87 km
1.58 gal (US)
1.32 gal (Imp)
5.98 L
53.25 kWh
126.58 mpg (US)
151.52 mpg (Imp)
1.86 L/100 km
0.79 gal (US)/100 mi
266.25 Wh/mi
Aligned / still shimmies after 45mph..
2013-03-28 151 mi
243.01 km
1.33 gal (US)
1.11 gal (Imp)
5.03 L
44.82 kWh
113.53 mpg (US)
136.04 mpg (Imp)
2.07 L/100 km
0.88 gal (US)/100 mi
296.82 Wh/mi
Offset incorrect / shimmy / needs align.
2013-03-22 200 mi
321.87 km
2.12 gal (US)
1.77 gal (Imp)
8.03 L
71.44 kWh
94.34 mpg (US)
112.99 mpg (Imp)
2.49 L/100 km
1.06 gal (US)/100 mi
357.2 Wh/mi
Install NOS 1982 ARE 13" Vector wheels and 4x110 wheel to hub adapters. (Very heavy).
2012-11-16 357 mi
574.54 km
2.97 gal (US)
2.47 gal (Imp)
11.24 L
100.09 kWh
120.2 mpg (US)
144.53 mpg (Imp)
1.96 L/100 km
0.83 gal (US)/100 mi
280.36 Wh/mi
Finish DNA striping and rear wing.
2012-10-30 1104 mi
1776.72 km
8 gal (US)
6.66 gal (Imp)
30.28 L
269.6 kWh
138 mpg (US)
165.77 mpg (Imp)
1.7 L/100 km
0.72 gal (US)/100 mi
244.2 Wh/mi
Ditch stock wheels and discs, install AR Spectre Wheels/new rubber (stock size 13")

No shimmy but wheels are heavy!

Side windows affixed.
2012-09-02 67 mi
107.83 km
1 gal (US)
0.83 gal (Imp)
3.79 L
33.7 kWh
67 mpg (US)
80.72 mpg (Imp)
3.51 L/100 km
1.49 gal (US)/100 mi
502.99 Wh/mi
Fix sticking front 1966 oem calipers replace internally collapsed lines.

Remount electric fan assy.
2012-08-24 321.8 mi
517.89 km
2.26 gal (US)
1.88 gal (Imp)
8.56 L
76.16 kWh
142.39 mpg (US)
171.17 mpg (Imp)
1.65 L/100 km
0.7 gal (US)/100 mi
236.67 Wh/mi
Driving mostly rural (70%)
Town about 30%
Staying around 45-48mph.
Dumped dynamo
2012-08-16 248 mi
399.12 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
124 mpg (US)
148.5 mpg (Imp)
1.9 L/100 km
0.81 gal (US)/100 mi
271.77 Wh/mi
Remove 4.11 diff / install 3.27
Engine degreed, offset key installed.

Corrected engine/trans alignment / angle.
Exhaust mods.
2012-08-07 107 mi
172.2 km
1 gal (US)
0.83 gal (Imp)
3.79 L
33.7 kWh
107 mpg (US)
128.92 mpg (Imp)
2.2 L/100 km
0.93 gal (US)/100 mi
314.95 Wh/mi
Rear alignment/shim trailing arms.

Venturing onto main roads.

Still needs work.
2012-07-29 88.9 mi
143.07 km
1 gal (US)
0.83 gal (Imp)
3.79 L
33.7 kWh
88.9 mpg (US)
107.11 mpg (Imp)
2.65 L/100 km
1.12 gal (US)/100 mi
379.08 Wh/mi
Driveshaft replaced, tunnel and misc sections of body cut out and rebuilt.

Still on backroads but now it's licensed! Windshield installed - no other glass in yet. Dynamo won't carry load of all lighting. Pulls to the right. Front end hops during a tight parking turn. Another vibration (engine side I think).

First real maiden voyage with any miles past 45 mph, windshield is great!!
2012-07-12 37.8 mi
60.83 km
1 gal (US)
0.83 gal (Imp)
3.79 L
33.7 kWh
37.8 mpg (US)
45.54 mpg (Imp)
6.23 L/100 km
2.65 gal (US)/100 mi
891.53 Wh/mi
Auto-darkening welding mask is a decent temporary windshield albeit a bit warm in July!

Backroad rally course ends in disaster as driveshaft breaks at transmission output destroying the tunnel. I now know where the incredible vibration was coming from.

Lost fuel feed line and all fuel in moonshine jug. This thing is a mess.
2012-07-08 10 mi
16.09 km
0.125 gal (US)
0.1 gal (Imp)
0.47 L
4.21 kWh
80 mpg (US)
100 mpg (Imp)
2.92 L/100 km
1.25 gal (US)/100 mi
421 Wh/mi
Maiden voyage.

No glass installed (no windshield, side/back, etc..)
Back roads under the cover of darkness with a streamlight duct taped to the hood.

Improvised moonshine jug as a fuel tank.

It lives! Ear to ear smile and nocturnal bugs caught between my teeth.

View: spreadsheet friendly fuel log output (for copy/paste)


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