That sounds reasonable: note that I said that on short routes the engine might not have a chance to warm up. Your source, however, quoted this 15% figure for c

That sounds reasonable: note that I said that on short routes the engine might not have a chance to warm up. Your source, however, quoted this 15% figure for city driving, I think that’s worth stressing as well. I wonder if they have any data for highway driving. I’m too lazy to Google, though.