Yes definitely tire inflation, I run just shy of max at operating temps. Take out uneccesary weight, accelerate gradually (i.e. don't bog the engine). Try not to go over ~70-75mph on freeway, don't coast in neutral, leave it in gear (uses no gas while coasting and >1200rpm). The main thing is give it little throttle until >2000rpm and don't drive fast. I average ~32mpg in my Accord with a best of 37.5