Savings of 20.76% fuel costs - spreadsheet

Summary: 
Savings of 20.76% fuel costs and only required 1 l of oil, where before oil usage was 0.5 litres oil per month.

(average fuel cost taken @$2.07)
11987 km @11.937 litres /100km =1431 litres @ $2.07 2962.17
11987km@9.458 l/100km=1134 liters @ $2.07 2347.38

SAVING IN 10 months on 11987km $614.79

Date Trip meter Odometer Litres Comments Cum km Cum litres Km/L L/100 km cum l/100 Cum from 11.94
236912
26-Aug 315 237227 37.6 Before Chemical insertion- then added chemical 315 38 8.38 11.937 11.937
Sept 11.937
7 415 237642 42.94 Town trips 415 43 9.66 10.347 10.347 13.32%
9 268 237910 20.01 Hamilton Auckland Airport trip 683 63 13.39 7.466 9.217 22.79%
10 323 238233 34.04 To wellington 1006 97 9.49 10.539 9.641 19.23%
12 475 238708 43.51 To wellington - Long run Chch 1481 141 10.92 9.160 9.487 20.53%
15 470 239178 41.13 To wellington - 1951 182 11.43 8.751 9.310 22.01%
18 439 239617 42.87 From Wellington - Taupo 2390 225 10.24 9.765 9.393 21.31%
25 544 240160 48.28 Auckland and around 2934 273 11.27 8.875 9.297 22.11%
27 538 240698 44.39 Auckland and around 3472 317 12.12 8.251 9.135 23.47%
30 454 241152 44.66 Auckland and around 3926 362 10.17 9.837 9.216 22.79%
10-Oct 513 241665 50.01 Hamilton and around 4439 412 10.26 9.749 9.278 22.28%
25-Oct 434 242100 43.06 Hamilton and around 4873 455 10.08 9.922 9.335 21.80%
7-Nov 459 242559 49.79 Hamilton and around 5332 505 9.22 10.847 9.465 20.71%
3-Nov 495 243054 46.57 Hamilton-around-Rotoroa 5827 551 10.63 9.408 9.460 20.75%
15-Dec 511 243565 50.1 Hamilton-around-Rotoroa 6338 601 10.20 9.804 9.488 20.51%
5-Jan 480 244045 46.54 Hamilton-around-Rotoroa 6818 648 10.31 9.696 9.503 20.39%
25-Jan 524 244570 50.69 Hamilton-around-Rotoroa 7342 699 10.34 9.674 9.515 20.29%
12-Feb 1024 245594 94.38 48+46.38 Hamilton Rotoroa 8366 793 10.85 9.217 9.478 20.60%
29-Feb 1034 246628 97.45 Auckland and around 49+48.45 9400 890 10.61 9.425 9.473 20.65%
30-Mar 686 247314 64.36 Hamilton - around 10086 955 10.66 9.382 9.466 20.70%
2-May 468 247782 46.5 Hamilton - around 10554 1001 10.06 9.936 9.487 20.52%
21-Jun 1433 249215 132.5 Hamilton and surrounds 11987 1134 10.82 9.246 9.458 20.76%