Gary, welcome to the forum the repository of information on the Elio including discussions on MPG. The forum has tons of information and I encourage you to start looking at the threads that most appeal to you. We are a friendly group and look forward to your comments, questions, and opinions. Enjoy the journey and the Elio experienceJim, I also owned 2 Chevy Sprints in the mid 80's. Great little cars for their price. MPG per passenger couldn't be beat! My 84 2dr manual weighed in @ 1488lbs. just a couple hundred less more an Elio!, and got 55+ mpg on the highway. My 87 4dr manual w/air only got 45+ mpg on the highway. On the down side I only got ~100K miles out of engines. The 84 wouldn't pass smog with computerized carburetor problems $$$, and the 87 had excessive oil consumption $$$, just like yours. Lets hope the new Elio engine turns out to be more reliable out the gate.
My question that Elio won't answer is: How much better is the orange P4 mule's MPG right now, than a 1984 Chevy Sprint? I know the orange mule doesn't have the production engine, suspension, hp tires etc, but if its not at least better than the Sprint, I can't see how a slightly different engine power curve, lighter springs, hp tires etc. will get the Elio up to 84 mpg??
Don't get me wrong, I like the Elio, and will buy one even if it only gets 70mpg! What I don't like is when Elio tells me they don't know what the P4's mpg is because it doesn't matter; computer simulations of the production components tell us everything we need to know!!