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Fuel log graph
Efficiency log for: Roxy - 1976 Vanguard Citicar
  • Lifetime Fuel Economy: 142.9 mpg (US), 1.6 L/100 km, 171.7 mpg (Imp)
  • 90-day Fuel Economy: 140.9 mpg (US), 1.7 L/100 km, 169.2 mpg (Imp)
  • 3-tank Fuel Economy: 140.9 mpg (US), 1.7 L/100 km, 169.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 0 mpg (US) / 0% (based on 90-day fuel economy)
  • Total fills: 47
  • Total fuel used: 40.32 gal (US), 152.6 L
  • Total distance traveled: 5762.9 mi. / 9274.5 km
  • Average tank distance: 122.6 mi. / 197.3 km
Fill date Distance Fill amount Price Fuel Economy Details
2012-04-30 103.1 mi
165.92 km
0.676 gal (US)
0.56 gal (Imp)
2.56 L
22.78 kWh
152.51 mpg (US)
184.11 mpg (Imp)
1.54 L/100 km
0.66 gal (US)/100 mi
220.95 Wh/mi
103.1 miles driven and 24.744 kWh used for April 2012. 240 wh/mile.
2012-03-31 119 mi
191.51 km
0.8876 gal (US)
0.74 gal (Imp)
3.36 L
29.91 kWh
134.07 mpg (US)
160.81 mpg (Imp)
1.75 L/100 km
0.75 gal (US)/100 mi
251.34 Wh/mi
119.0 miles driven and 32.487 kWh used for March 2012. 273 wh/mile.
2012-02-29 93.4 mi
150.31 km
0.676 gal (US)
0.56 gal (Imp)
2.56 L
22.78 kWh
138.17 mpg (US)
166.79 mpg (Imp)
1.7 L/100 km
0.72 gal (US)/100 mi
243.9 Wh/mi
93.4 miles driven and 24.75 kWh used for February 2012. 265 wh/mile.
2012-01-31 115.5 mi
185.88 km
0.8268 gal (US)
0.69 gal (Imp)
3.13 L
27.86 kWh
139.7 mpg (US)
167.39 mpg (Imp)
1.68 L/100 km
0.72 gal (US)/100 mi
241.21 Wh/mi
262 Wh/mile for January. Driven several days to work. New charger appears to be much more efficient than the original 35 year-old Lester, but aging batteries are still not as good as they were several years ago. 30.26 kWh for 115.5 miles.
2011-12-31 37 mi
59.55 km
0.303 gal (US)
0.25 gal (Imp)
1.15 L
10.21 kWh
122.11 mpg (US)
148 mpg (Imp)
1.93 L/100 km
0.82 gal (US)/100 mi
275.95 Wh/mi
300 Wh/mile for December. Not driven much this month - working on modifications to the electrical system for an upgrade to 64 volts (from 48 volts). Upgrade completed December 31st.

New charger wants to 'equalize' after every charge, so the Wh/mile may go up simply due to the extra energy required in equalization. Once I get used to the way the charger works, I may turn it off when that part of the charge curve program occurs.

11.1 kWh used for 37 miles.
2011-11-30 133 mi
214.04 km
1.137 gal (US)
0.95 gal (Imp)
4.3 L
38.32 kWh
116.97 mpg (US)
140 mpg (Imp)
2.01 L/100 km
0.85 gal (US)/100 mi
288.12 Wh/mi
311 Wh/mile for November.

41.6 kWh used for 133 miles.
2011-10-31 75 mi
120.7 km
0.633 gal (US)
0.53 gal (Imp)
2.4 L
21.33 kWh
118.48 mpg (US)
141.51 mpg (Imp)
1.99 L/100 km
0.84 gal (US)/100 mi
284.4 Wh/mi
309 Wh/mile for October. Short trips and little use lower efficiency.

23.2 kWh used for 75 miles.
2011-09-30 218 mi
350.84 km
1.894 gal (US)
1.58 gal (Imp)
7.17 L
63.83 kWh
115.1 mpg (US)
137.97 mpg (Imp)
2.04 L/100 km
0.87 gal (US)/100 mi
292.8 Wh/mi
318 Wh/mile for September. Testing of the rebuilt motor and break-in of new brushes, combined with the extra power needed by the aging pack uses more power than in the past.

69.3 kWh used for 218 miles.
2011-08-31 124 mi
199.56 km
0.926 gal (US)
0.77 gal (Imp)
3.51 L
31.21 kWh
133.91 mpg (US)
161.04 mpg (Imp)
1.76 L/100 km
0.75 gal (US)/100 mi
251.69 Wh/mi
285 Wh/mile for August. As pack ages, it takes more power to charge.

35.3 kWh used for 124 miles.
2011-07-31 101.9 mi
163.99 km
0.74 gal (US)
0.62 gal (Imp)
2.8 L
24.94 kWh
137.7 mpg (US)
164.35 mpg (Imp)
1.71 L/100 km
0.73 gal (US)/100 mi
244.75 Wh/mi
266 Wh/mile for July. Still using the stock (unmodified) motor that isn't quite as efficient as the other one. Hopefully the new parts for the modded motor will arrive soon. Battery pack will be 4 years old in August, and is using more power during the charge finish cycle - was 1.6 amps, now is about 3.1 amps (input). As always, these measurements are taken at the wall outlet, and include battery charging losses. If measured at the controller, the efficiency would appear to be significantly better, probably less than 200 Wh/mile.

27.1 kWh used for 101.1 miles.
2011-06-30 117.2 mi
188.62 km
0.8937 gal (US)
0.74 gal (Imp)
3.38 L
30.12 kWh
131.14 mpg (US)
158.38 mpg (Imp)
1.79 L/100 km
0.76 gal (US)/100 mi
257 Wh/mi
279 Wh/mile for June. Installed a stock (unmodified) motor that isn't quite as efficient as the other one.

32.71 kWh used for 117.2 miles.
2011-04-24 39 mi
62.76 km
0.3156 gal (US)
0.26 gal (Imp)
1.19 L
10.64 kWh
123.57 mpg (US)
150 mpg (Imp)
1.9 L/100 km
0.81 gal (US)/100 mi
272.82 Wh/mi
296 Wh/mile for April. Poor efficiency due to higher voltage testing which included top speed and acceleration time trials. Brush link melted during one test because of worn out/frayed fiberglass insulation allowing link to contact motor frame. Only driven for four days in April.

11.55 kWh used for 39.0 miles.
2011-03-31 159.8 mi
257.17 km
1.123 gal (US)
0.93 gal (Imp)
4.25 L
37.85 kWh
142.3 mpg (US)
171.83 mpg (Imp)
1.65 L/100 km
0.7 gal (US)/100 mi
236.86 Wh/mi
257 Wh/mile for March. Mostly used as a commute vehicle - as with last month, rainy weather wasn't conducive to driving the Citicar for about half of the month. Battery pack is feeling its age, and taking more amp-hours to recharge.

41.12 kWh used for 159.8 miles.
2011-02-28 119.7 mi
192.64 km
0.846 gal (US)
0.7 gal (Imp)
3.2 L
28.51 kWh
141.49 mpg (US)
171 mpg (Imp)
1.66 L/100 km
0.71 gal (US)/100 mi
238.18 Wh/mi
259 Wh/mile for February. Occasional use as a commute vehicle - as with last month, rainy weather wasn't conducive to driving the Citicar most days. Short trips for the remainder lowered efficiency.

30.96 kWh used for 119.7 miles.
2011-01-31 164.3 mi
264.42 km
1.14 gal (US)
0.95 gal (Imp)
4.32 L
38.42 kWh
144.12 mpg (US)
172.95 mpg (Imp)
1.63 L/100 km
0.69 gal (US)/100 mi
233.84 Wh/mi
254 Wh/mile for January. Occasional use as a commute vehicle but rainy weather wasn't conducive to driving the Citicar most days. Short trips for the remainder lowered efficiency.

41.73 kWh used for 164.3 miles.
2010-12-31 118 mi
189.9 km
0.8139 gal (US)
0.68 gal (Imp)
3.08 L
27.43 kWh
144.98 mpg (US)
173.53 mpg (Imp)
1.62 L/100 km
0.69 gal (US)/100 mi
232.46 Wh/mi
253 Wh/mile for December. Used as a commute vehicle / daily driver first half of the month. Short trips for the remainder lowered efficiency. Watered and equalized batteries which also tends to use more power than just driving around.

29.79 kWh used for 118 miles.
2010-11-30 220 mi
354.06 km
1.397 gal (US)
1.16 gal (Imp)
5.29 L
47.08 kWh
157.48 mpg (US)
189.66 mpg (Imp)
1.49 L/100 km
0.64 gal (US)/100 mi
214 Wh/mi
232 Wh/mile for November. Used as a commute vehicle / daily driver this month. Used field weakening when stable at cruise speed to test if it would help efficiency. No real change was noted for better or worse.

51.12 kWh used for 220 miles. Efficiency was about the same as last month.
2010-10-31 178 mi
286.46 km
1.125 gal (US)
0.94 gal (Imp)
4.26 L
37.91 kWh
158.22 mpg (US)
189.36 mpg (Imp)
1.49 L/100 km
0.63 gal (US)/100 mi
212.98 Wh/mi
231 Wh/mile for October. Used as a commute vehicle / daily driver this month. Not too many miles, however, as I was out of town for over a week.

41.19 kWh used for 178 miles. Efficiency was about the same as last month.
2010-09-30 327 mi
526.26 km
2.054 gal (US)
1.71 gal (Imp)
7.78 L
69.22 kWh
159.2 mpg (US)
191.23 mpg (Imp)
1.48 L/100 km
0.63 gal (US)/100 mi
211.68 Wh/mi
230 Wh/mile for September. Used as a commute vehicle / daily driver this month, averaging about 13 miles a day. Longish trips (for a Citicar) plus daily use keep the efficiency good.
75.17 kWh used for 327 miles - a personal record month for distance traveled. Efficiency not quite as good as last month - used a whopping 2 Wh/mi more compared to August.
2010-08-31 310 mi
498.9 km
1.933 gal (US)
1.61 gal (Imp)
7.32 L
65.14 kWh
160.37 mpg (US)
192.55 mpg (Imp)
1.47 L/100 km
0.62 gal (US)/100 mi
210.13 Wh/mi
228 Wh/mile for August. Used as a commute vehicle / daily driver this month, averaging about 10 miles a day. Longish trips (for a Citicar) plus daily use keep the efficiency good.
70.75 kWh used for 310 miles - a personal record month for distance traveled and efficiency. Previous high miles month was September 2008 at 290 miles, and efficiency was 230 Wh/mile in October 2009.
2010-07-31 175 mi
281.64 km
1.143 gal (US)
0.95 gal (Imp)
4.33 L
38.52 kWh
153.11 mpg (US)
184.21 mpg (Imp)
1.54 L/100 km
0.65 gal (US)/100 mi
220.11 Wh/mi
239 wh/mile for July. 41.83 kwh used for 175 miles. Typical driving was commuting to work, about 4.5 miles each way. Biggest changes in efficiency tend to be distance between charges (shorter distance = less efficient) and speed. Operating above 25 mph gets into the zone where the poor aerodynamic shape of the Citicar takes a significant toll.
2010-06-30 231 mi
371.76 km
1.512 gal (US)
1.26 gal (Imp)
5.72 L
50.95 kWh
152.78 mpg (US)
183.33 mpg (Imp)
1.54 L/100 km
0.65 gal (US)/100 mi
220.56 Wh/mi
240 wh/mile for June. Used more as a commute vehicle this month than the past few months. Typical trip was around 9 miles. At one point wh/mile was at 235, but several short trips conspired to make it slightly less efficient. 55.36 kwh used for 231 miles.
2010-05-31 121 mi
194.73 km
0.8658 gal (US)
0.72 gal (Imp)
3.28 L
29.18 kWh
139.76 mpg (US)
168.06 mpg (Imp)
1.68 L/100 km
0.72 gal (US)/100 mi
241.16 Wh/mi
262 watt hours/mile for May. 31.69 kw/h for 121 miles. Most trips were in the two to five mile range. No significant changes to the vehicle this month.
2010-04-30 52 mi
83.69 km
0.3847 gal (US)
0.32 gal (Imp)
1.46 L
12.96 kWh
135.17 mpg (US)
162.5 mpg (Imp)
1.74 L/100 km
0.74 gal (US)/100 mi
249.23 Wh/mi
271 watt hours/mile for April. 14.08 kw/h for 52 miles. Just about every trip this month was two miles - not the best for efficiency as charger spends a lot of its time in the less effective finish part of the cycle.
2010-03-31 112 mi
180.25 km
0.7678 gal (US)
0.64 gal (Imp)
2.91 L
25.87 kWh
145.87 mpg (US)
175 mpg (Imp)
1.61 L/100 km
0.69 gal (US)/100 mi
230.98 Wh/mi
112 miles in March with 28.1 kwh used for 251 wh/mile. No reading for February - Numerous opportunity charges without the kill-a-watt meter. Probably about 250 wh/mile in Feb. As batteries age, the wh/mile number is creeping up...
2010-01-31 39 mi
62.76 km
0.2617 gal (US)
0.22 gal (Imp)
0.99 L
8.82 kWh
149.03 mpg (US)
177.27 mpg (Imp)
1.58 L/100 km
0.67 gal (US)/100 mi
226.15 Wh/mi
Finally got the Citicar back on the road after replacing the controller. New controller is a 7245 - was a 4845. Only 39 miles in January; 9.58 kwh used for 246 wh/mile. Some defroster use - also batteries have been underused so waking them back up may be a minor factor. (edited for correct date)
2009-10-31 41 mi
65.98 km
0.2576 gal (US)
0.22 gal (Imp)
0.98 L
8.68 kWh
159.16 mpg (US)
186.36 mpg (Imp)
1.49 L/100 km
0.63 gal (US)/100 mi
211.71 Wh/mi
Good efficiency for October - 230 wh/mile. Unfortunately, only 41 miles this month as the speed controller gave up. 9.43 kwh used for .2576 gallons of gas equivalent.
2009-09-30 183 mi
294.51 km
1.176 gal (US)
0.98 gal (Imp)
4.45 L
39.63 kWh
155.61 mpg (US)
186.73 mpg (Imp)
1.51 L/100 km
0.64 gal (US)/100 mi
216.56 Wh/mi
235 wh/mile for September. First half of month was about 255/mile. Changed transaxle oil from 75w/90 synthetic to Pennzoil Synchromesh. After oil change more efficient - about 225 wh/mile/
43.04 kwh used for 183 miles.
2009-08-31 184 mi
296.12 km
1.256 gal (US)
1.04 gal (Imp)
4.75 L
42.33 kWh
146.5 mpg (US)
176.92 mpg (Imp)
1.6 L/100 km
0.68 gal (US)/100 mi
230.05 Wh/mi
Yet another month at 250 wh/mile. Looks like a trend.
184 miles and 45.98 kwh used for August.
2009-07-31 100 mi
160.93 km
0.6789 gal (US)
0.57 gal (Imp)
2.57 L
22.88 kWh
147.3 mpg (US)
175.44 mpg (Imp)
1.6 L/100 km
0.68 gal (US)/100 mi
228.8 Wh/mi
Another month at around 250 wh/mile. This month is 248.5 - 100 miles driven and 24.85 kwh used. Gasoline equivalent to .6789 gallons energy.
2009-06-30 97 mi
156.11 km
0.6628 gal (US)
0.55 gal (Imp)
2.51 L
22.34 kWh
146.35 mpg (US)
176.36 mpg (Imp)
1.61 L/100 km
0.68 gal (US)/100 mi
230.31 Wh/mi
Same as last month - 250 wh/mile. Longer trips were better (down to 225 wh/mile) but as there were sometimes days between uses, and many short trips, the potential efficiency was better than reality.

24.26 kwh used this month.
2009-05-31 137 mi
220.48 km
0.936 gal (US)
0.78 gal (Imp)
3.54 L
31.54 kWh
146.37 mpg (US)
175.64 mpg (Imp)
1.61 L/100 km
0.68 gal (US)/100 mi
230.22 Wh/mi
250 wh/mile this month. Motor brushes advanced 5 degrees from stock. Slightly better acceleration and efficiency. Many drives this month were three or four miles which makes wh/mile go up.
2009-04-27 97 mi
156.11 km
0.6358 gal (US)
0.53 gal (Imp)
2.41 L
21.43 kWh
152.56 mpg (US)
183.02 mpg (Imp)
1.54 L/100 km
0.66 gal (US)/100 mi
220.93 Wh/mi
240 wh/mile average for April. Warmer weather and longer average drives (at slower speed - not maxed out...) make for better efficiency!
2009-03-31 79 mi
127.14 km
0.5428 gal (US)
0.45 gal (Imp)
2.05 L
18.29 kWh
145.54 mpg (US)
175.56 mpg (Imp)
1.61 L/100 km
0.69 gal (US)/100 mi
231.52 Wh/mi
79 miles in March with 19.87 kwh used. 252 wh/mile average.
2009-02-28 91 mi
146.45 km
0.6344 gal (US)
0.53 gal (Imp)
2.4 L
21.38 kWh
143.44 mpg (US)
171.7 mpg (Imp)
1.64 L/100 km
0.7 gal (US)/100 mi
234.95 Wh/mi
23.22 kwh for 91 miles in February 2009. 255 wh/mile.

Performance is back to more or less normal...
2009-01-31 93 mi
149.67 km
0.7352 gal (US)
0.61 gal (Imp)
2.78 L
24.78 kWh
126.5 mpg (US)
152.46 mpg (Imp)
1.86 L/100 km
0.79 gal (US)/100 mi
266.45 Wh/mi
26.91 kWh used in January for 93 miles. 289 wh/mile. Dragging brakes after brake replacement caused higher than normal consumption this month.

Brakes readjusted for zero drag near the end of the month, improving wh/mile figure from 300+ wh/mile back to a more normal 250 or so.
2008-12-31 37 mi
59.55 km
0.3041 gal (US)
0.25 gal (Imp)
1.15 L
10.25 kWh
121.67 mpg (US)
148 mpg (Imp)
1.93 L/100 km
0.82 gal (US)/100 mi
277.03 Wh/mi
37 EV miles in last half of December using 11.13 kWh.
.3041 gallons equivalent.
301 wh/mile. 10 degree Advance in motor timing didn't help speed or acceleration, but caused a drop in efficiency. Motor turned back to 'stock' position after the two week test.
2008-12-14 46 mi
74.03 km
0.3415 gal (US)
0.28 gal (Imp)
1.29 L
11.51 kWh
134.7 mpg (US)
164.29 mpg (Imp)
1.74 L/100 km
0.74 gal (US)/100 mi
250.22 Wh/mi
46 EV miles in first half of December using 12.5 kWh.
.3415 gallons equivalent.
272 wh/mile. Defroster use and cold are conspiring to lower the efficiency...
2008-11-30 152 mi
244.62 km
1.173 gal (US)
0.98 gal (Imp)
4.44 L
39.53 kWh
129.58 mpg (US)
155.1 mpg (Imp)
1.82 L/100 km
0.77 gal (US)/100 mi
260.07 Wh/mi
btu conversion. 39.55 kwh for 152 miles
260 wh/mile. Use of defroster drives down the efficiency... oddly enough, drove the same number of miles last month!
2008-10-31 152 mi
244.62 km
1.064 gal (US)
0.89 gal (Imp)
4.03 L
35.86 kWh
142.86 mpg (US)
170.79 mpg (Imp)
1.65 L/100 km
0.7 gal (US)/100 mi
235.92 Wh/mi
38.93 kwh for 152 miles in October. (1.06366 gl equivalent) 256 wh/mile average. A bit higher electricity use than past reports due to a number of short trips. All in all, still cheap - at 6.5 cents a kwh, the 152 miles cost a grand total of $2.53 - a cost equivalent of about 180 MPG.
2008-09-30 290 mi
466.71 km
1.928 gal (US)
1.61 gal (Imp)
7.3 L
64.97 kWh
150.41 mpg (US)
180.12 mpg (Imp)
1.56 L/100 km
0.66 gal (US)/100 mi
224.03 Wh/mi
290 EV miles in September using 70.55 kWh.
1.92759 gallons equivalent.
243 wh/mile.
2008-08-31 222 mi
357.27 km
1.544 gal (US)
1.28 gal (Imp)
5.84 L
52.03 kWh
143.78 mpg (US)
173.44 mpg (Imp)
1.63 L/100 km
0.7 gal (US)/100 mi
234.37 Wh/mi
56.5 kWh for 222 miles (month of August)
254 watt hours / mile
2008-07-31 111 mi
178.64 km
0.763 gal (US)
0.64 gal (Imp)
2.89 L
25.71 kWh
145.48 mpg (US)
173.44 mpg (Imp)
1.62 L/100 km
0.69 gal (US)/100 mi
231.62 Wh/mi
Total of miles and kilowatt hours for July 2008 - 111 miles/27.96kWh.
252 watt hours / mile

Used on-line converter for 27.96kWh = 0.76363 gallons
2008-07-06 8 mi
12.87 km
0.0697 gal (US)
0.06 gal (Imp)
0.26 L
2.35 kWh
114.78 mpg (US)
133.33 mpg (Imp)
2.02 L/100 km
0.87 gal (US)/100 mi
293.75 Wh/mi
292.5 wh/mile
2008-07-05 18 mi
28.97 km
0.16 gal (US)
0.13 gal (Imp)
0.61 L
5.39 kWh
112.5 mpg (US)
138.46 mpg (Imp)
2.11 L/100 km
0.89 gal (US)/100 mi
299.44 Wh/mi
300 wh/mile multiple short charges
2008-07-03 10 mi
16.09 km
0.092 gal (US)
0.08 gal (Imp)
0.35 L
3.1 kWh
108.7 mpg (US)
125 mpg (Imp)
2.18 L/100 km
0.92 gal (US)/100 mi
310 Wh/mi
btu conversion
2008-06-29 12 mi
19.31 km
0.089 gal (US)
0.07 gal (Imp)
0.34 L
3 kWh
134.83 mpg (US)
171.43 mpg (Imp)
1.76 L/100 km
0.74 gal (US)/100 mi
250 Wh/mi
3 kW used for 12 miles - 250 watts/mile
.065 cents / kWh = 19.5 cents
regular gas = 4.56 / Gl
.195/4.56 = .0427 Gl
.08939 gallons / 12 miles using BTU equivalents

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


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