billtech66

Working professionly on vehicles for almost 50 years; Best things to improve fuel economy is: 1. a light foot. as Paul mentioned. 2. Tire Pressures. Make sure they are not low, and in fact raise them as much as is safe, but not to maximum. 3. Dropping your speed by 3mph. 4. Putting auto trans in neutral at stops, since it uses up to 50% more fuel at stops when in gear. quote: A main way hybrid-electric cars reduce fuel consumption is by switching off their engines while stopped in traffic. For modern, fuel-injected vehicles, the break-even point for turning off the engine and then restarting it right before traffic begins to flow may be as little as 10 seconds, even when considering extra wear on the starter motor, battery and other components. END http://www.edmunds.com/car-reviews/top-10/top-10-ways-to-waste-gas.html RE: K&N air filters; all modern air filters are high flow, high volume. And if there WAS a minor restriction, it would not lower fuel economy in modern fuel injected vehicles. (or RAISE fuel economy if you took the Air Filter OUT.) ECU's base fuel delivery on air volume entering the engine, engine temperature, throttle position. The air filter is BEFORE this sensor. RE: 0w20 oil vs 10w40 engine oil. I've done dyno tests and fuel consumption runs comparing the two and there was zero difference. When engine oil is hot, all oils are thin. NOT IMO enough difference to make a significant (or even noticeable) increase in fuel economy. http://www.upmpg.com/tech_articles/motoroil_viscosity/ If there was a trick to increase fuel economy and power, Manufacturers are already using it. for example: 4 valves per cyl; variable cam timing, close tolerances, many man hours dyno testing, computer model testing .. large or small changes in shape and smoothness of intake and exhaust ports for flow dynamics, inertia tuning, acoustic tuning, valves, combustion chamber, placement of spark plugs ... We get as much power and efficiency per cc now in an average car as we used to brag about from a highly tuned race engine decades ago.