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Old 03-23-2009, 09:43 AM   #16
Samurai75007
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Re: Average mileage on a 300C?

pistal pete,

Welcome to AutomotiveForums.com!

Just to let you know its somewhat of a fopa to bring up a three year old topic but most people don't mind.

If you didn't know, the reason 300C's get so good of millage is because the V8 engine is designed to cruse only using four cylinders. But then use the other four again when passing or more performance is needed.

"The new Hemi V8 is a thoroughly modern engine using lots of new technology and processes. The most significant of these technologies is cylinder deactivation This works by keeping the valves closed on four of the cylinders when they are not needed, like during light-throttle cruising and coasting. This has the effect of switching between a 4 cylinder engine and a V8 in the blink of an eye. When you are cruising on the highway, you are being powered by a "4 cylinder" engine, but as soon as you tip into the gas, you have the advantage of a powerful V8. The transition between 4 and 8 cylinders is seamless and virtually unnoticeable."
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Old 05-28-2012, 08:06 AM   #17
Chuckfw
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Re: Average mileage on a 300C?

Quote:
Originally Posted by Samurai75007 View Post
pistal pete,

Welcome to AutomotiveForums.com!

Just to let you know its somewhat of a fopa to bring up a three year old topic but most people don't mind.

If you didn't know, the reason 300C's get so good of millage is because the V8 engine is designed to cruse only using four cylinders. But then use the other four again when passing or more performance is needed.

"The new Hemi V8 is a thoroughly modern engine using lots of new technology and processes. The most significant of these technologies is cylinder deactivation This works by keeping the valves closed on four of the cylinders when they are not needed, like during light-throttle cruising and coasting. This has the effect of switching between a 4 cylinder engine and a V8 in the blink of an eye. When you are cruising on the highway, you are being powered by a "4 cylinder" engine, but as soon as you tip into the gas, you have the advantage of a powerful V8. The transition between 4 and 8 cylinders is seamless and virtually unnoticeable."
This is very true. I have wondered if the cylinders that "shut down" are the same cylinders all of the time or does the selection vary?
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