On-road vehicles account for nearly 60 percent of total U.S. oil consumption and more than a quarter of the nation’s greenhouse gas emissions, the major contributor to climate change. Taking small steps to improve vehicle fuel efficiency can go a long way to lowering the amount you pay at the pump and reducing your environmental impact.

Here at the Energy Department and our National Laboratories, our scientists and engineers are looking for ways to help Americans save money by saving energy. These experts are answering your questions and sharing their advice on how you can save energy at home and on the road as part of our #AskEnergySaver series.

Around the middle of every month, you can submit your energy efficiency questions based on that month’s theme — whether it’s insulation, water heaters or incorporating renewable energy into your home. This month — and just in time for the summer driving season — we’re answering your questions about fuel efficiency. Just post your questions on social media (whether it’sTwitter, Facebook, Google+ or Instagram) using #AskEnergySaver or email it to newmedia@hq.doe.gov.

We’ll pick up to five questions based on the monthly theme and post the answers a week later on Energy.gov — creating a resource for others.

We look forward to answering your energy efficiency questions! And be sure to check back on this blog post every month for information about how to submit questions for the next #AskEnergySaver theme.