When I look into your package, I think I can see why you're still experiencing a lot of loss.
If we take the wheel weight along and subtract Tsportline's claimed 36%; it would give you a wheel weight of ~24lbs FR/26lbs RR. When you add the Goodyear Eagle F1 Asymmetric 3's, (33lbs FR / 36lbs RR) your combo weight is 57lbs FR/62lbs RR. Comparatively, an OEM 20 set weighs in at 32lbs FR, 33.2lbs RR plus 30lbs for the tires for a total weight of 62lbs FR/ 63.2lbs RR. Overall, you have a weight savings of 8% on the fronts and 2% on the rear.
When we combine that with a look at your tread width, the Goodyears have a 9.9" FR contact patch; 10.5" RR contact patch. The OEM 20's have a 8.5" FR and 8.9" RR. That's increased road friction of 16.5% FR and 18% rear. Great for handling, not so much for efficiency. The tires are also stickier compound; the Goodyears are a Max Summer Tire with a AA traction rating. This most likely wipes out the weight savings and increases your energy usage.
For additional comparison OEM 22's (37.6lbs FR/40.4lbs RR) and Pirelli Scorpion Zero (27lbs FR/35lbs RR) have a combination weight of 64.6 FR/75.4 RR - heavier by 4% FR/19% RR. The OEM Pirellis have tread widths of 9.1" FR and 10" RR wider by 7% FR/12% RR. My OEM 20" wheels w/Conti's get about 370wh/mi. My OEM 22"s wheels w/Pirelli's get ~410wh/mi - about a 11% difference overall.
If you're looking for efficiency, these are the ones that should help and in comparison to OEM 22 Pirelli Scorpion Zeros. These are all lighter and have smaller contact patches.
- Continental ExtremeContact DWS 06
- Yokohama PArada Spec-X
- Pirelli Scorpion Zero All Season Plus - Non OE
If you went with MX115 + Continental ExtremeContact DWS 06. You would end up with a package that weighs 51lbs FR / 61lbs RR; which are lighter 18% FR / 3% Rear; with an increase tread width of 7% FR / 12% RR - all in comparison to the OEM 20 package. They would also be in the Ultra High Performance All-Season category; which is not as soft and sticky and be a middle ground between what the OEM 20's are and the Goodyears you have.
I would suspect with that combination, you might actually achieve a consumption that is more on par with the OEM 20's.