Today I worked on my car, it is very surprising to see how sometimes simple solutions led to big results, as I told earlier on that I have an mas-flo injection system on my car also my fuel consumption is 10.7 miles per gallon, now today I just found out that the end of my shorty headers where it attaches to the exhaust had loose bolts, I tighten them up one by one, fill the tank and made a total of 64 miles trip in the highway my average cruising speed was around 65 miles then I fill the tank again at the end of the trip suddenly my milage was 18.6 miles per gallon which is good I suppose, so I believe the sensors had a bad reading due to the loose bolts at the end of the headers, but this milage is on the high way I will try it in the city in the traffic do you guys think this milage is good in the highway ?
Well that's about a 80% increase in fuel economy just by tightening 3 bolts. I'd say that's pretty impressive. I have a 2014 F150 crew cab (4 door) with a 5.0 V8. I think 64 miles is not really enough. Since my truck is on the heavy side so it's interesting watching the average fuel economy setting. It varies wildly and quickly. I can go from 26 mpg to 14 mpg average very quickly