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Normal refills occur when one fuel bar is remaining.  I do not top off the tank.
Highest Tank ==>			72.2				Lowest Tank ==>			40.3
Averages ==>		55.1	56.9			503	14	75,969	9.18	1,378
Date	Tank MPG	Lifetime Average	12-Month Average	Average Temp. ºF	Delta MPG	Tank Miles	Tank Days	Total Miles	Refill Gallons	Total Gallons	Notes
08/26/04				69.0		3.0		3			Picked up car
09/02/04	44.6	45.1	45.11	67.6		279.4	7	282	6.260	6	Gallons estimated based on Prius MPG
09/09/04	50.4	47.7	47.75	65.9	5.8	467.5	7	750	9.446	16	2 fuel bars remaining
09/10/04	43.4	45.3	45.32	65.0	-7.0	439.4	1	1,189	10.539	26	Complete Interstate driving
09/12/04	45.9	45.7	45.74	64.0	2.5	420.1	2	1,609	8.937	35	About 95% Interstate driving
09/17/04	49.2	46.5	46.50	63.2	3.3	490.6	5	2,100	9.977	45	About half Interstate driving and then back to normal
10/02/04	49.9	46.9	46.94	59.6	0.7	452.0	15	2,552	9.208	54	Starting to get cold - temperature affects mileage
10/11/04	48.9	47.3	47.32	55.0	-1.0	299.0	9	2,851	5.887	60	Good price on gas, refilled early
10/27/04	50.5	47.2	47.18	50.6	1.6	441.0	16	3,292	9.525	70	Might this be the last 50+ tank of the year?
11/10/04	50.0	47.4	47.39	49.5	-0.5	483.8	14	3,776	9.892	80	Last fuel bar blinking.
11/22/04	44.0	47.2	47.18	44.2	-6.0	313.9	12	4,090	7.016	87	Found the tire pressure to be very low. AARGH!
11/28/04	48.3	47.0	47.04	35.8	4.3	437.1	6	4,527	9.554	96	400 highway miles averaging ~62MPH - outbound
11/30/04	47.5	47.1	47.11	34.0	-0.8	449.5	2	4,976	9.384	106	400 highway miles averaging ~62MPH - return
12/11/04	43.1	46.7	46.66	34.3	-4.4	405.9	11	5,382	9.736	115	The avearge temp fails to capture the bitter mornings
12/22/04	40.4	46.5	46.52	22.3	-2.7	387.6	11	5,770	8.678	124	Fighting to keep the mileage above 40
01/03/05	41.8	46.0	45.97	25.7	1.4	350.4	12	6,120	9.090	133	Little bit of a warm stretch
01/15/05	40.6	45.6	45.61	23.7	-1.2	348.2	12	6,468	8.696	142	Hopefully it gets warmer from here
01/26/05	41.5	45.2	45.24	18.7	0.9	356.8	11	6,825	9.051	151	Even with colder temps I was able to improve MPG
02/03/05	46.2	45.1	45.09	25.4	4.7	381.9	8	7,207	8.952	160	Steller tank performance!
02/16/05	46.0	45.3	45.30	33.4	-0.2	401.6	13	7,609	8.127	168	This warm weather isn't going to last.
03/06/05	44.2	44.9	44.93	27.6	-1.8	363.6	18	7,972	9.470	177	Out of town for a week
03/16/05	44.6	44.9	44.93	29.3	2.4	435.0	10	8,407	9.687	187	Temperature is creeping up!  Hurray!!  :-)
03/30/05	50.0	45.1	45.09	36.4	5.8	503.4	14	8,911	10.501	198	First 50MPG tank of the season.  More to come.
04/13/05	53.0	45.6	45.62	46.5	3.0	540.3	14	9,451	9.550	207	Is this a preview of upcoming mileage?
04/30/05	51.8	45.6	45.62	47.9	-1.2	456.3	17	9,907	9.984	217	Could have gone farther, but decent gas price.
05/15/05	51.6	45.9	45.89	50.7	-0.2	518.9	15	10,426	10.044	227	Second half of the last tank and this one, A/C on
05/30/05	55.5	46.3	46.33	56.4	3.9	514.0	15	10,940	8.943	236	First ever 55MPG tank!!
06/17/05	56.0	46.6	46.59	68.6	0.5	553.5	18	11,494	10.550	247	Was fighting at the end to keep it above 56
07/07/05	58.2	47.2	47.17	70.0	2.2	612.9	20	12,107	10.000	257	Some of the time was carpooling
08/03/05	60.0	47.5	47.47	74.2	1.8	589.3	27	12,696	10.773	267	A whole month on a single tank!
08/24/05	58.5	48.0	48.01	72.0	-1.5	624.1	21	13,320	10.014	277	Some A/C
09/14/05	58.3	48.4	48.66	71.5	-0.2	573.2	21	13,893	9.834	287	Getting gas every three weeks.  I could get used to this.
09/22/05	55.4	48.4	48.80	62.3	-2.9	282.5	8	14,176	5.366	293	Decided to short-tank for fear of rising costs (Hurricane Rita)
10/15/05	55.2	48.6	48.95	60.0	-0.2	526.3	23	14,702	9.896	303	Glad I short-tanked the last one.  Prices spiked and dropped.
10/23/05	53.2	48.7	49.01	49.3	-2.0	369.9	8	15,072	7.047	310	Decided to short-tank because the price was quite attractive.
11/15/05	50.8	48.7	49.07	45.4	-2.4	500.9	23	15,573	10.431	320	Most likely the last 50+MPG tank for quite some time.
11/30/05	44.4	48.7	49.32	33.0	-6.4	427.1	15	16,000	8.830	329	Mileage dropping like a stone.
12/14/05	40.3	48.4	48.97	18.8	-4.1	362.1	14	16,362	9.270	338	Dissapointing Mileage; but accounted for with dropping temps
12/30/05	45.0	48.1	48.83	25.9	4.7	390.4	16	16,752	10.071	348	A nice turn in the weather helped with this one.
01/22/06	48.6	48.1	49.79	34.7	3.6	458.4	23	17,211	9.354	358	First refill of the new year.
02/09/06	46.8	48.1	50.18	30.7	-1.8	429.0	18	17,640	8.836	366	OEM EV Button Installed during this tank
03/03/06	48.2	48.0	50.22	25.1	1.4	455.0	22	18,095	10.372	377	MPG went up while temp went down?  EV button?
03/26/06	46.7	48.0	50.80	34.1	-1.5	425.3	23	18,520	9.409	386	Dissapointed in the mileage drop.  May be using the EV too much
04/19/06	54.5	48.2	51.27	47.3	7.8	489.1	24	19,009	8.405	395	Man how I love warm weather.
05/05/06	54.0	48.3	51.01	51.9	-0.5	553.4	16	19,563	10.789	405	5 MPG over last year at this time.
05/16/06	54.6	48.3	51.28	51.0	0.6	534.3	11	20,097	10.452	416	It rained 9 of the 11 days.   Still better than last year.
06/13/06	57.9	48.5	51.27	61.0	3.3	618.8	28	20,716	10.980	427	I was really hoping to break 60mpg with this one.
07/01/06	58.9	48.8	51.67	68.0	1.0	597.2	18	21,313	9.912	437	Used the Air conditioner on this one.  Notable hit to mileage.
07/20/06	60.5	49.1	52.17	72.0	1.6	601.0	19	21,914	9.696	446	First 150 miles was at 53.4 MPG.  Brought it up
08/02/06	61.7	49.2	51.77	78.0	1.2	574.2	13	22,488	10.782	457	New personal record; I suspect 10.782 is from stretching the bladder
08/21/06	62.1	49.5	52.14	70.0	0.4	640.0	19	23,128	10.326	468	New personal record! I triple-checked that temperature drop.
09/14/06	63.0	49.9	53.04	66.8	0.9	686.2	24	23,814	9.555	477	Another Personal Record!   Again, temperature down, MPG up.
09/26/06	61.2	50.2	52.81	59.0	-1.8	546.0	12	24,360	8.439	486	The last bip was blinking but only needed 8.5 gallons.
10/13/06	60.8	50.2	52.72	52.5	-0.4	566.1	17	24,926	11.054	497	I’m sure this will be my last 60+ tank of the year.
10/30/06	56.3	50.3	52.96	43.5	-4.5	544.7	17	25,471	9.338	506	First 1/2 Interstate.  Severe temp drop and very windy
11/15/06	56.5	50.5	53.38	41.6	0.2	480.3	16	25,951	7.522	513	Surprised at maintaining MPG.
11/30/06	55.3	50.5	53.38	41.4	-1.2	414.5	15	26,366	8.806	522	Getting Cold.  Got gas prior to Winter Storm.
12/15/06	50.2	50.6	53.92	27.1	-5.1	456.2	15	26,822	7.333	530	First time I used the heater this winter.
12/29/06	53.9	50.5	53.42	37.0	3.7	363.5	14	27,186	8.699	538	First full tank with a blocked grill.  Temperature increase.
01/11/07	54.5	50.5	54.55	37.8	0.6	459.4	13	27,645	9.610	548	Nice uptick in temperatures.
01/30/07	50.1	50.5	54.37	24.5	-4.4	462.2	19	28,107	9.193	557	Cold.  Very cold.
02/08/07	44.0	50.3	54.15	5.6	-6.1	393.8	9	28,501	9.001	566	Flat tire, dead battery, record cold; I shouldn't complain.
02/22/07	52.0	50.4	54.05	16.3	8.0	439.2	14	28,940	8.500	575	Mileage increase outpaced the temperature increase
03/06/07	52.5	50.4	54.20	27.3	0.5	410.5	12	29,351	7.897	582	Would have liked better but the snow and rain kept falling
03/23/07	57.0	50.3	54.39	38.6	4.5	495.3	17	29,846	10.343	593	Looking forward to summer weather.
04/07/07	58.3	50.6	55.29	46.5	1.3	576.6	15	30,423	8.661	601	Got off to a warm start then turned cold again.
04/22/07	57.5	50.6	55.12	41.9	-0.8	503.0	15	30,926	9.780	611	Had another cold snap.  Hopefully the last of the season.
05/02/07	61.2	50.8	55.02	54.2	3.7	587.9	10	31,514	9.387	621	1. First 60+ tank of the season! I think I'll start counting them.
05/15/07	62.6	51.0	55.69	58.9	1.4	591.5	13	32,105	9.093	630	2. Almost a record tank, but last-minute rain ruined it.
05/31/07	64.1	51.1	56.00	64.4	1.5	583.7	16	32,689	10.056	640	3. New personal record.  56 MPG here I come!
06/16/07	66.0	51.3	56.67	69.8	1.9	693.5	16	33,382	10.483	650	4. New record. Kept dropping below 66 had to fight to keep it up.
07/02/07	66.0	51.6	57.17	70.3	0.0	664.1	16	34,046	9.719	660	5. Was hoping to exceed 66.0.  Hopefully next time.
07/20/07	63.7	51.7	57.14	73.8	-2.3	622.4	18	34,669	10.483	670	6. It was a bad tank anyway ending with 110 miles of highway.
08/08/07	66.7	51.9	57.26	75.4	3.0	676.8	19	35,346	10.515	681	7. New Record!  First 110 miles was highway @ ~56MPG.
08/28/07	66.7	52.1	57.70	71.3	0.0	678.8	20	36,024	10.810	692	8. Saw 67MPG for a few days then the rain came.
09/15/07	65.1	52.3	58.28	67.5	-1.6	660.8	18	36,685	9.001	701	9. Maybe I can squeak out one more 60+ tank this year.
10/02/07	68.0	52.5	58.36	67.5	2.9	612.4	17	37,298	9.500	710	10. New record!  In October!  What's up with that?
10/08/07	63.0	52.6	57.90	71.3	-5.0	564.9	6	37,862	9.384	720	11. This tank was more than 75% highway miles.
10/15/07	64.9	52.8	57.94	55.2	1.9	596.5	7	38,459	9.175	729	12. First 375 miles were highway miles.  The rest as normal.
11/02/07	59.5	52.9	58.39	53.5	-5.4	556.9	18	39,016	9.021	738	Finally dropped below 60mpg.  Temps and short trips contributed.
11/17/07	59.5	52.9	58.36	41.8	0.0	543.6	15	39,559	9.430	747	Such a high tank surprised me given average temperature.
12/04/07	55.3	53.0	58.18	32.6	-4.2	478.4	17	40,038	8.255	756	Cold temps and short trips brought it down.  Was holding high 50s.
12/15/07	53.4	53.0	58.28	23.4	-1.9	450.5	11	40,488	9.003	765	This tank was Chicagoland gas.  Next tank from Wisconsin.
01/04/08	55.8	53.0	58.58	28.8	2.4	485.0	20	40,973	9.053	774	Temp and Mileage up.  Wisconsin gas.
01/18/08	57.8	53.0	58.49	33.1	2.0	509.6	14	41,483	9.068	783	Surprised at the MPG.  Was in 58 until right at end.
01/31/08	50.1	52.9	58.52	14.7	-7.7	438.1	13	41,921	9.144	792	Temperature was a major factor as were a couple snow storms.
02/14/08	53.6	53.0	58.70	22.6	3.5	461.0	14	42,382	8.409	800	Major snow storms during this tank.  Temperatures improving.
02/27/08	51.9	53.0	59.11	19.1	-1.7	458.2	13	42,840	8.409	809	Cold weather and snow storms and short trips.
03/10/08	56.2	52.9	58.91	24.7	4.3	493.6	12	43,334	10.248	819	Hopefully the temps are on the way up.
03/25/08	59.3	53.0	59.27	34.3	3.1	571.4	15	43,905	9.132	828	So frustrated.  450 miles at 60+ MPG and then major snow storm.
04/14/08	58.8	53.1	59.79	40.7	-0.5	561.5	20	44,467	9.304	837	With higher temps I expected better mileage.  Just didn't happen.
04/28/08	66.9	53.2	59.77	51.2	8.1	601.3	14	45,068	9.175	847	1. First 60+ tank of the season.  Was at 67.8 but then bad weather.
05/19/08	62.7	53.3	60.13	49.8	-4.2	584.4	21	45,652	9.289	856	2. Was hoping to get higher but will take another 60+ mpg tank.
06/06/08	65.9	53.4	60.08	56.7	3.2	624.2	18	46,277	10.161	866	3. Relatively chilly weather so far this season
07/02/08	71.2	53.7	60.37	68.6	5.3	700.2	26	46,977	9.509	875	4. First 70+ tank!! Yippee
07/23/08	72.2	53.8	60.27	70.6	1.0	663.6	21	47,640	10.091	886	5. New personal record.
08/05/08	71.3	54.0	60.76	72.0	-0.9	492.5	13	48,133	6.500	892	6. Rotated tires, bad gas?, short tanked prior to trip.
08/10/08	63.8	54.0	60.43	69.7	-7.5	467.4	5	48,600	8.254	900	7. Almost 100% highway miles.
08/20/08	64.9	54.1	60.56	68.1	1.1	664.6	10	49,265	10.504	911	8. About 75% highway.  Disappointed with mileage.
09/08/08	71.6	54.3	61.14	68.4	6.7	693.5	19	49,958	8.874	920	9. Aimed for a new high but ended with a temp drop and rain.
09/21/08	68.3	54.4	60.92	63.7	-3.3	580.0	13	50,538	8.500	928	10. Temperature is dropping.
10/06/08	65.7	54.5	60.71	58.2	-2.6	575.2	15	51,114	9.680	938	11. Might be my last 60+ tank of the year.
10/20/08	65.0	54.6	60.81	55.7	-0.7	624.1	14	51,738	10.001	948	12. Temperature's dropping.
10/31/08	63.3	54.7	60.73	46.0	-1.7	507.4	11	52,245	8.004	956	13. Yet another 60+ tank.  Getting new tires tomorrow.
11/14/08	58.8	54.7	60.76	47.1	-4.5	538.9	14	52,784	8.587	964	Finally dropped below 60mpg.  New tires, perhaps?
12/03/08	51.4	54.6	60.25	31.0	-7.4	430.9	19	53,215	9.501	974	Dropped like a stone.  I honestly think I got bad gas.
12/13/08	50.4	54.6	59.99	20.9	-1.0	468.5	10	53,683	9.065	983	Cold and miserable weather
12/22/08	46.2	54.5	59.90	18.1	-4.2	400.8	9	54,084	8.503	992	4 winter storms in one week.  Record cold and a foot of snow.
12/27/08	55.4	54.5	59.51	23.6	9.2	496.4	5	54,581	9.857	1001	100% highway miles.  Half with strong tailwind.
01/08/09	52.4	54.6	59.85	24.8	-3.0	461.7	12	55,042	7.315	1009	Threatening to be a long cold winter
01/27/09	45.2	54.5	59.39	11.3	-7.2	342.0	19	55,384	8.067	1017	Average temp 11.3ºF.  No wonder mpg was so low.
02/07/09	49.6	54.4	59.36	18.2	4.4	393.8	11	55,778	8.501	1025	Still cold but getting warmer.
02/20/09	53.1	54.4	59.23	30.9	3.5	464.4	13	56,243	9.000	1034	Glad to see mileage back above 50.
03/06/09	52.9	54.3	59.03	28.9	-0.2	447.3	14	56,690	8.999	1043	Had a good tank going until three days of snow.
03/19/09	55.6	54.3	59.33	36.0	2.7	503.0	13	57,193	9.228	1053	Nice bump.  Good to see it heading back up.
04/01/09	56.0	54.4	59.22	38.1	0.4	490.4	13	57,683	8.695	1061	This was a very hard 56.  Kept hovering in high 55s.
04/14/09	55.5	54.3	58.67	39.3	-0.5	469.9	13	58,153	9.695	1071	Can't explain why this one isn't higher.
04/30/09	56.8	54.3	58.57	48.7	1.3	517.2	16	58,670	8.962	1080	Hopefully the start of higher mileage.
05/15/09	59.6	54.4	58.32	54.9	2.8	542.3	15	59,213	9.198	1089	Saw 60 a couple times but hit construction and bad weather.
05/29/09	60.9	54.4	58.23	57.2	1.3	517.8	14	59,730	8.503	1098	This relatively low mileage is really starting to get on my nerves.
06/18/09	61.0	54.5	58.48	59.1	0.1	557.4	20	60,288	8.500	1106	I can't believe how hard I had to work for a 61mpg tank.
06/30/09	64.1	54.6	58.42	70.2	3.1	543.4	12	60,831	9.032	1115	Was above 65 for a while but then drove interstate for a while.
07/17/09	62.5	54.6	58.05	65.5	-1.6	581.4	17	61,413	9.044	1124	Refill before Hybridfest. Weirdly cold.
07/26/09	57.4	54.6	57.76	66.6	-5.1	498.8	9	61,911	9.914	1134	Mostly highway mileage and then a trip to the dealership.
08/07/09	69.0	54.7	57.75	68.8	11.6	483.9	12	62,395	6.999	1141	Short-tanked this one in anticipation of the upcoming trip.
08/10/09	55.5	54.7	57.34	74.5	-13.5	486.7	3	62,882	8.252	1149	100% highway miles.
08/12/09	58.4	54.7	57.15	68.8	2.9	522.4	2	63,404	9.998	1159	About 95% Interstate driving
08/26/09	66.1	54.8	57.43	68.6	7.7	602.3	14	64,007	9.293	1169	Getting back into the groove of things.  Probably no 70+ this year.
09/12/09	63.7	54.9	57.49	62.3	-2.4	597.4	17	64,604	9.034	1178	I fear the cold is coming.
09/30/09	64.1	54.9	56.96	62.3	0.4	573.5	18	65,178	9.279	1187	Honestly surprised by the 64mpg.
10/14/09	58.8	54.9	56.59	46.9	-5.3	536.6	14	65,714	9.480	1196	Started with 150 miles of interstate, finished with cold temps.
11/02/09	59.5	55.0	56.52	48.0	0.7	554.9	19	66,269	8.602	1205	Several days of rain but otherwise relatively warm weather.
11/06/09	50.7	54.9	55.88	44.2	-8.8	472.7	4	66,742	10.333	1215	About 80% was interstate with staedy 15mph headwinds
11/11/09	59.5	55.0	56.22	58.7	8.8	554.0	5	67,296	8.288	1224	Mostly interstate driving but this time with a 10mph tailwind.
11/25/09	59.0	55.0	55.77	45.2	-0.5	484.3	14	67,780	9.733	1233	Cold weather is coming.  This will be the last respectable tank.
12/09/09	55.3	54.9	55.98	31.2	-3.7	479.3	14	68,259	9.355	1243	Average driving; dropping temps.  Using the EBH
12/23/09	50.0	54.9	55.84	24.5	-5.3	426.8	14	68,686	9.000	1252	Almost entirely highway; light snow with some wind
12/27/09	49.7	54.9	56.11	27.4	-0.3	379.4	4	69,066	6.844	1259	100% highway miles, about half through a snowstorm
01/08/10	51.4	54.8	56.02	16.0	1.7	424.4	12	69,490	8.990	1268	So far holding its own in the cold weather.
01/21/10	55.2	54.8	55.76	24.6	3.8	486.3	13	69,976	9.012	1277	Unnaturally warm winter so far
02/01/10	53.5	54.8	56.00	23.6	-1.7	473.4	11	70,450	9.249	1286	Surprised that I'm still holing above 50.  Could I go the whole winter?
02/16/10	55.4	54.8	56.21	23.5	1.9	477.9	15	70,928	9.002	1295	Hoping the temperatures go up from here.
03/02/10	56.9	54.8	56.46	29.2	1.5	495.1	14	71,423	8.354	1303	The warmer weather is coming!
03/17/10	60.4	54.8	56.57	36.7	3.5	534.2	15	71,957	10.000	1313	First 60+ tank of the year! Earliest 60+ ever!
04/01/10	60.9	54.8	56.76	43.9	0.5	547.0	15	72,504	9.093	1322	Was hovering at 60 for a while.  Final days of warm temps helped.
04/14/10	60.4	54.9	56.94	53.2	-0.5	555.6	13	73,060	9.000	1331	Was hoping for higher.  Still a full 5mpg over this time last year.
04/27/10	59.7	54.9	57.41	48.5	-0.7	556.3	13	73,616	8.999	1340	Disapointed by the drop in mileage but it got cold again.
05/12/10	63.9	55.0	57.67	50.7	4.2	573.3	15	74,189	8.700	1349	Hopefully I'll stay above 60mpg for the rest of the summer.
05/26/10	64.2	55.0	57.71	59.5	0.3	568.9	14	74,758	9.501	1358	Keeping up with two years ago when I eventually topped 70mpg.
06/09/10	63.7	55.1	57.75	65.7	-0.5	573.1	14	75,331	9.274	1368	Ended the tank with mileage-lowering interstate driving.
07/08/10	66.1	55.1	57.64	71.0	2.4	638.3	29	75,969	10.004	1378	Was out of town for two weeks.  Nice overall tank.
MPG is tracked on the left axis and temperature is tracked on the right axis.
								Chart
	Important Dates
		Aug, '06	Overinflated tires from 35f/33r to 42f/40r.  Noticeable mileage bump.
		Dec, '06	Blocked the grill with piping insulation for the first time.
		Aug, '07	Overinflated tires from 42f/40r to 52f/50r.  Questionable mileage improvement.
		Nov, 08	New Goodyear Integrity tires.
		July, '09	Installed and started using Engine Block Heater.