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What does the weight mean on a can of motor oil?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question164.htm
Motor oil weight depends on viscosity and other factors. Learn how motor oil weight is determined in this article.
What gives a Harley-Davidson motorcycle its distinctive sound?
auto.howstuffworks.com/question325.htm
What gives a Harley-Davidson motorcycle its distinctive sound?
What is the problem with MTBE in gasoline?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question347.htm
Why does gasoline contain MTBE, and what is the problem with it?
What's the difference between gasoline, kerosene, diesel, etc?
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/question105.htm
What's the difference between gasoline, kerosene and diesel? Learn how crude oil's carbon chains determine whether it becomes gasoline, kerosene or diesel.
Why are they replacing all of the traffic lights in my town?
auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/question178.htm
In my town, they are replacing all of the traffic lights with these new lights that look like they are made of hundreds of tiny bulbs. Why are they replacing all of the lights?
Why do some dump trucks have extra moveable axles?
auto.howstuffworks.com/question26.htm
I see many dump trucks with wheels on two rear axles on the ground and a third axle with elevated wheels that can be lowered. These seem to be used when the truck is full -- but why include what must be expensive hardware to raise and lower the wheels? Why not just keep them down at all times?
Why do some engines use a dry sump oil system?
auto.howstuffworks.com/fuel-efficiency/fuel-consumption/question331.htm
A dry sump is used in both race cars and some motorcycles (like Harley-Davidsons). What is the advantage of a dry sump?
How Airbags Work
auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/airbag.htm
Do airbags reduce the risk of injury in crashes? Learn about airbags and see the Mythbusters test airbag explosions in a video from Discovery Channel.
How Diesel Engines Work
auto.howstuffworks.com/diesel.htm
Diesel engines are often more efficient and less expensive to operate than their gasoline alternatives. So why aren't there more diesels on the roads? Well, they have their own issues, too.
How Diesel Two-Stroke Engines Work
auto.howstuffworks.com/diesel-two-stroke.htm
Diesel two-stroke engines are used to power locomotives, large ships, and generating facilities. Find out how a diesel two-stroke engine works.