Read reviews, browse our car inventory, and more. View detailed gas mileage data for the 2004 Volvo S40. See the 2004 Volvo S40 Gas Mileage figures for both the city and highway. Learn what owners have to say and get authentic consumer feedback before buying your next car. Vehicle EPA Fuel Economy Driver MPG Annual Fuel Cost MSRP Energy Impact Score Greenhouse Gas Emissions (tailpipe) 2004 Volvo S40 FWD 2.5 L, 5 cyl, Automatic (S5), Turbo, Premium Gasoline EPA MPG. Will run quite well on 86 Octane Regular gas. Edmunds' expert review of the Used 2004 Volvo S40 provides the latest look at trim-level features and specs, performance, safety, and comfort. 2004 Volvo C70 Convertible 5 cyl, 2.3 L, Automatic 5-spd. Premium Gasoline. See the 2004 Volvo S40 price range, expert review, consumer reviews, safety ratings, and listings near you. Gas Mileage, Tank Capacity and more specs. Read consumer reviews from real 2004 Volvo S40 (New) buyers. Research the 2004 Volvo S40 at cars.com and find specs, pricing, MPG, safety data, photos, videos, reviews and local inventory. Research the 2004 Volvo S40 at cars.com and find specs, pricing, MPG, safety data, photos, videos, reviews and local inventory. Find the engine specs, MPG, transmission, wheels, weight, performance and more for the 2004 Volvo S40 Sedan 4D Turbo. Use our handy tool to get estimated annual fuel costs based on your driving habits. Learn more about the 2004 Volvo S40. Find the engine specs, MPG, transmission, wheels, weight, performance and more for the 2004 Volvo S40 Sedan 4D 2.4i. Detailed features and specs for the Used 2004 Volvo S40 including fuel economy, transmission, warranty, engine type, cylinders, drivetrain and more. The most accurate 2004 Volvo S40s MPG estimates based on real world results of 305 thousand miles driven in 42 Volvo S40s Read consumer reviews from real 2004 Volvo S40 buyers. There is Fuel Economy data for each trim as well as a description of the drivetrain. ... Gas mileage is good, not great, but 28+ on hi-way, 21+ city in average driving. Get the most useful fuel economy data and other technical specs for the 2004 Volvo S40 2004 1.9L Automatic. Owner MPG Estimates.