Some changes to the design. Currently manual adjustment without remote control. I need a bigger servo than what I have. I have calculated at the max speed of 200km/h (124mph) there would be 10kg of force on the spoiler. I was doing average 5.3l/100km (44.38mpg) before this. First test today resulted with 4.3l/100km (54.7mpg). Both driven values at average 80km/h (49.7mph)
Did not have the guts to go any faster than 140km/h with this thing being new. This is only my first try and I know I should be doing more. But its 18% savings was too much to keep it in a closet.