2008-06-29	12	0.089		134.83	"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"
2008-07-03	10	0.092		108.7	"btu conversion"
2008-07-05	18	0.16		112.5	"300 wh/mile multiple short charges"
2008-07-06	8	0.0697		114.78	"292.5 wh/mile"
2008-07-31	111	0.763		145.48	"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"
2008-08-31	222	1.544		143.78	"56.5 kWh for 222 miles (month of August) 254 watt hours / mile"
2008-09-30	290	1.928		150.41	"290 EV miles in September using 70.55 kWh. 1.92759 gallons equivalent. 243 wh/mile."
2008-10-31	152	1.064		142.86	"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."
2008-11-30	152	1.173		129.58	"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!"
2008-12-14	46	0.3415		134.7	"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..."
2008-12-31	37	0.3041		121.67	"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."
2009-01-31	93	0.7352		126.5	"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."
2009-02-28	91	0.6344		143.44	"23.22 kwh for 91 miles in February 2009. 255 wh/mile. Performance is back to more or less normal..."
2009-03-31	79	0.5428		145.54	"79 miles in March with 19.87 kwh used. 252 wh/mile average."
2009-04-27	97	0.6358		152.56	"240 wh/mile average for April. Warmer weather and longer average drives (at slower speed - not maxed out...) make for better efficiency!"
2009-05-31	137	0.936		146.37	"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."
2009-06-30	97	0.6628		146.35	"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."
2009-07-31	100	0.6789		147.3	"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."
2009-08-31	184	1.256		146.5	"Yet another month at 250 wh/mile. Looks like a trend. 184 miles and 45.98 kwh used for August."
2009-09-30	183	1.176		155.61	"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."
2009-10-31	41	0.2576		159.16	"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."
2010-01-31	39	0.2617		149.03	"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)"
2010-03-31	112	0.7678		145.87	"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..."
2010-04-30	52	0.3847		135.17	"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."
2010-05-31	121	0.8658		139.76	"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."
2010-06-30	231	1.512		152.78	"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."
2010-07-31	175	1.143		153.11	"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."
2010-08-31	310	1.933		160.37	"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."
2010-09-30	327	2.054		159.2	"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."
2010-10-31	178	1.125		158.22	"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."
2010-11-30	220	1.397		157.48	"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."
2010-12-31	118	0.8139		144.98	"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."
2011-01-31	164.3	1.14		144.12	"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."
2011-02-28	119.7	0.846		141.49	"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."
2011-03-31	159.8	1.123		142.3	"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."
2011-04-24	39	0.3156		123.57	"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."
2011-06-30	117.2	0.8937		131.14	"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."
2011-07-31	101.9	0.74		137.7	"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."
2011-08-31	124	0.926		133.91	"285 Wh/mile for August. As pack ages, it takes more power to charge. 35.3 kWh used for 124 miles."
2011-09-30	218	1.894		115.1	"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."
2011-10-31	75	0.633		118.48	"309 Wh/mile for October. Short trips and little use lower efficiency. 23.2 kWh used for 75 miles."
2011-11-30	133	1.137		116.97	"311 Wh/mile for November. 41.6 kWh used for 133 miles."
2011-12-31	37	0.303		122.11	"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."
2012-01-31	115.5	0.8268		139.7	"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."
2012-02-29	93.4	0.676		138.17	"93.4 miles driven and 24.75 kWh used for February 2012. 265 wh/mile."
2012-03-31	119	0.8876		134.07	"119.0 miles driven and 32.487 kWh used for March 2012. 273 wh/mile."
2012-04-30	103.1	0.676		152.51	"103.1 miles driven and 24.744 kWh used for April 2012. 240 wh/mile."