2016-03-29	233.6	18.807	$1.949	12.42	""
2016-04-12	283.1	20.309	$1.889	13.94	""
2016-04-26	451.6	31.874	$1.889	14.17	""
2016-05-06	389	27.902	$2.079	13.94	""
2016-05-20	404	29.705	$2.059	13.6	""
2016-06-10	450	33.302	$2.229	13.51	""
2016-07-05	361	27.763	$2.029	13	""
2016-07-21	436	31.882	$1.959	13.68	""
2016-07-29	348	24.897	$1.879	13.98	""
2016-08-15	375	29.107	$1.939	12.88	"Last set with 225/75/15 tires, battery died so mileage is off"
2016-08-25	390.3	28.739	$2.069	13.58	"First with new 285/70/17 tires, ~33"" diameter 15.81% gear reduction."
2016-09-07	399.3	29.171	$2.039	13.69	""
2016-09-14	450.7	31.446	$2.039	14.33	"Replaced driver's 3 point towing mirror with 2003+ paddle blind-spot style on 9/11 and removed driver's side FM antenna whip."
2016-09-21	364.2	26.076	$2.009	13.97	"Removed passenger mirror and antenna, added temporary camera install 9/16. Lots of city driving this tank, possibly low FE."
2016-09-30	442.9	30.9	$2.009	14.33	"Subtracted 1 gallon due to doing 10x 1/4 mile runs @ estimated 0.1 gallon per run at WOT."
2016-10-05	207.65	13.434	$2.009	15.46	"Corrected mileage calibration of 15.861% over due to larger rear tires."
2016-10-30	461.5	30.073	$2.129	15.35	"Finished driver's front fender skirt 10/27, reinstalled air silencer 10/21 - significantly better throttle response with it than without."
2016-11-10	404.6	28.57	$2.029	14.16	"Lots of coasting down in neutral (maybe more fuel used than coasting down in drive) and idling in neutral at stop lights. Idle in neutral is ~1000rpm no load vs in D at ~750-800rpm. Possibly higher fuel use in neutral?"
2016-11-17	411	30.564	$1.929	13.45	"Lots of idling and low speed during 50 mile relay race. Unusually low mpg because of this. Finished driver's bellypan 11/10 axle-to-axle."
2016-12-13	576.7	41.824	$2.109	13.79	"Failing fuel pump = 25psi pressure. Replaced on 12/10, now 45-50psi and good idle and vastly improved performance."
2017-01-02	394	29.76	$2.259	13.24	"Driven while building rear shell, lots of miles with gurney flap rear end and partially completed shell. Basic shape done 12/28, still missing passenger side bondo and upper lip radius."
2017-01-10	398.7	29.321	$2.299	13.6	"Noted really bad non-drafting vacuum at 70-80mph, in the 6-8inHG range. When drafting large vehicles it was consistently 10-15, and usually >12inHG. New wider front wheels are probably a big contributor, as they stick out from the OE fenders. Time for an aero project!"
2017-01-20	429.4	31.401	$2.219	13.67	"Finished front side of driver's wheel 1/15. Rear side is open and unfinished. Still very low mpg, started dropping immediately after starting bellypan, still very low even after replacing fuel pump. Hard to tell what is causing the low mpg."
2017-02-06	366.9	28.001	$2.159	13.1	"Driver's side skirt complete to back side of rear wheel, finished 2/1. Still needs smoothing and contouring on underside and to blend panel to panel around driver's door. I'm nearly 100% certain that the rear shell extension is a big net negative to fuel economy and drag."
2017-02-14	428.4	29.42	$2.169	14.56	"Driver's side skirts finished from front bumper back to 1/2 way around rear wheel. Noticeable 1.1mpg improvement over previous 3 fillups, around a 10% improvement in fuel economy!!!"
2017-02-24	425.9	30.387	$2.159	14.02	"Installed giant class IV hitch, hangs waaaay out in space under the rear bumper. Without fairings I'd guess this is 0.5mpg worse. Started on the driver's rear fender flare on 2/17, mostly done except for sanding and paint by 2/27."
2017-03-13	447.7	32.771	$2.119	13.66	"Finished driver's side to bumper on 2/26, haven't touched the hitch yet. The hitch is probably around 0.5mpg penalty, estimated."
2017-03-20	424.6	30.995	$2.099	13.7	"Cut off part of the rear shell on 3/10-3/12, even with tuft testing and a camera hanging out in space...same mpg! So the old shell is likely a net negative and should have been removed a long time ago. Still lots of inverted flow in the top 4-5"" of taper, probably either too much taper causing separation or too much flow over the top causing a swirl."
2017-03-28	389.2	27.107	$2.139	14.36	"Removed the center top ""taper"" section on 3/21 (same day as refill), gained about 0.66mpg from removing it!"
2017-04-03	470.3	32.568	$2.179	14.44	"Added back in semi-tapered (flat at edges) center section on 3/29, did 3 hour highway Croom Fool's Run drive. So mileage is not on the same route and schedule as normal."
2017-04-24	409.6	29.695	$2.299	13.79	"Significantly worse with new taper, but also fixed the A/C in the middle of the tank on 4/18 so extra idling time and A/C power use on highways. Running 1 more tank with A/C use and then 1 without to see if that's the difference or the result is the taper's fault."
2017-05-04	420.7	30.216	$2.279	13.92	"No aero mods, ran the fixed A/C about as much as last tank. Will run next tank with no A/C to see if the drop was due to the 20-30 deg departure => 12deg departure, or due to A/C use."
2017-05-24	417	29.042	$2.149	14.36	"First non-A/C tank with 12 degree rear taper. Included ~50 miles @ 80mph with no drafting, while rushing to the airport."
2017-06-02	371.1	25.482	$2.169	14.56	"No A/C use, more consistent with normal weekly driving schedule. Average 14.38mpg with larger side taper, 14.46mpg with 12 degree taper, 13.85mpg with 12 degree taper and A/C use"
2017-06-26	389.1	28.222	$2.009	13.79	"Back to normal highway speeds, estimate ~0.5-1mpg improvement by going ~60mph instead of 70-80mph."
2017-07-08	354	24.813	$1.959	14.27	"100 miles with the center taper, then removed it to just have the side tapers. Significantly better mpg without it!"
2017-07-17	407.7	26.745	$1.959	15.24	"Without center taper. At 240 miles, cut the side tapers down to only 4"" back from original body contour. Best MPG in months!"
2017-07-25	392.7	25.064	$2.099	15.67	"No aero changes, but driving slow due to overheating problems. New pump, thermostat and radiator cap haven't fixed it. Derale 18217 fan and new radiator going in 7/26."
2017-08-04	424.8	30.299	$2.219	14.02	"Fixed radiator cooling problems, but still using 180F thermostat and clutch fan. Horrendous traffic jams, likely lower MPG due to that."
2017-08-16	361.3	25.019	$2.159	14.44	"No changes, just another tank with no significant traffic jams."
2017-08-27	401.4	27.813	$2.219	14.43	"Back to original 195F thermostat from 180F @ 87 miles into the tank. Lots of city miles, probably dragging the average down a bit."
2017-09-05	318.8	21.65	$2.659	14.73	"Consistent driving again, 14.73mpg shows about a 2% increase with 195F vs 180F thermostat. Not really significant on a big van like this."
2017-09-21	467.5	31.94	$2.639	14.64	"Normal driving, no changes from previous tank. Stable at about 14.7mpg."
2017-10-04	507.1	34.118	$2.429	14.86	"Removed the rest of the rear shell attempts @ 5 miles in. Returned it to the stock contours, with slightly extended sections near the new taillights. MPG basically the same, but noticeably less stable in crosswinds and when trailing behind semis."
2017-10-16	494.4	32.748	$2.219	15.1	"No changes since last tank, but some significant distance <60mph near Clermont."
2017-10-23	406.4	29.192	$2.219	13.92	"Lots of idling in traffic, heavy traffic jams, sitting at races, etc. Ignore this tankfull."
2017-11-03	453	30.343	$2.249	14.93	"No mods, just another tank with regular schedule."
2017-11-22	439.6	32.064	$2.339	13.71	"Lots of fast driving to and from airport, no mod changes. But no drafting either."
2017-12-03	481.2	33.911	$2.319	14.19	"Still airport driving fast, but getting back to normal schedule. No A/C use this tank due to lower temps."
2017-12-11	397.8	25.922	$2.279	15.35	"No aero changes, back to normal schedule. No A/C use due to winter coming to FL!"
2017-12-28	468.9	31.49	$2.299	14.89	"Started building passenger front tire flare on 12/17, mostly done with the rear flare by 12/29. Only single inner width layer between the wheels, nothing attached to the doors yet."
2018-01-11	425.5	29.263	$2.389	14.54	"Lower MPG due to being in the middle of passenger skirt construction. Filled at exactly 0.25 tank indicated, which is actually about 0.17 tank."
2018-01-25	450.6	30.553	$2.489	14.75	"Finished basic shape on 1/12, but still lots of gaps and lumpy sections, especially near the back of the sliding door. Trimmed and glassed edge on 1/24, hope to finish the rear section next week."
2018-02-08	464.1	30.606	$2.529	15.16	"Finished passenger side from front door to rear bumper, but still rough and with a giant radius on the aft side of the front wheel arch."
2018-02-21	428	29.402	$2.439	14.56	"Finshed cleaning up front passenger door and front bumper."
2018-03-05	451.5	30.38	$2.409	14.86	"No changes"
2018-03-16	392.7	27.327	$2.379	14.37	"No changes"
2018-03-26	516.6	32.854	$2.439	15.72	"Filled in radius aft of front wheel, smooth now like a conventional wheelwell."
2018-04-05	451.5	31.613	$2.519	14.28	"Overheated in the middle due to losing lower radiator hose, lots of traffic jams, etc."
2018-04-22	423.9	28.276	$2.649	14.99	"No changes. Not much drafting, last week before AC use."
2018-04-30	458.6	30.455	$2.649	15.06	"No changes, significant traffic jams, using AC"
2018-05-17	455.9	31.844	$2.729	14.32	"No changes, significant traffic jams, using AC"
2018-05-25	471.6	31.833	$2.819	14.81	"No changes, significant traffic jams, using AC"
2018-06-05	435.7	30.212	$2.739	14.42	"No changes, using AC"
2018-06-19	449.6	31.713	$2.559	14.18	"No changes, using AC"
2018-07-03	495.3	33.963	$2.619	14.58	"No changes, using AC"
2018-07-19	460.9	31.366	$2.659	14.69	"No changes, using AC"
2018-07-31	442.7	30.604	$2.609	14.47	"No changes, using AC"
2018-08-14	429.1	29.869	$2.669	14.37	"Lots of fast driving, not much drafting. Missing giant ragged chunk aft of front wheel, need to bondo and fiberglass it permanenetly in place."