I have been trying to get a feel for lean burn. Mostly in my car that means I get in it on level or slight down slope. Then as my speed drops on the slightest up grade and I have to give it a little gas, I lose it. There seems to be an advantage to dropping a gear to a higher rpm. I have tried google custom search on the site and ran into what a moderator called “haystack” : too many long winded technical threads, without a seeming conclusion. And I do read them. Granted I am trying this when it is 35 to 45 degrees out on the occasional long stretch without a stop in Portland. But I actually noticed it on my last 800 mile freeway trip at 70 degrees. Is my car just weak or is it a tight wire walk at best? What, in a sentence or two of plain English is the latest strategy?