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What about fuel types & gas mileage?

297 messages,  Last post on Jan 20, 2013 at 2:20 PM

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What is this discussion about? Engine, Fuel System

Messages Page 26 of 30

#251 of 297 Re: Gas Milage [shipo] by Mr_Shiftright HOST

Jul 13, 2007 (7:58 am)

Replying to: shipo (Jul 12, 2007 9:22 pm)
I think that pre-computer, automobiles required a bump in timing (timing advance) to compensate for the carburator's inability to adjust proper fuel mixture at altitude.

#252 of 297 Re: Gas Milage [Mr_Shiftright] by shipo

Jul 13, 2007 (8:31 am)

Replying to: Mr_Shiftright (Jul 13, 2007 7:58 am)
Hmmm, thinking back to the 1970s (when I turned a wrench to make a living), I don't remember tweaking the timing to help cars deal with altitude, that said, I do remember rejetting any number of carburetors.
 
Best Regards,
Shipo

#253 of 297 Re: Gas Milage [shipo] by Mr_Shiftright HOST

Jul 13, 2007 (5:14 pm)

Replying to: shipo (Jul 13, 2007 8:31 am)
Well the bump in timing was great for cars that were going up 5,000 feet for a few days--you wouldn't want to re-jet just for that.

#254 of 297 Re: Gas Milage [Mr_Shiftright] by shipo

Jul 13, 2007 (10:07 pm)

Replying to: Mr_Shiftright (Jul 13, 2007 5:14 pm)
Ahhh, got it. If one of the cars I worked on in San Diego was only heading up to the 5,000 foot mark for a few days, I wouldn't bother touching the car, however, the bump in timing doesn't sound like such a bad idea. The only cars I rejetted were the ones that were heading up into the Rockies or the Sierras to stay (or at least to stay for a considerable length of time).
 
Best Regards,
Shipo

#255 of 297 Re: Gas Milage [shipo] by Mr_Shiftright HOST

Jul 14, 2007 (7:23 am)

Replying to: shipo (Jul 13, 2007 10:07 pm)
Oh advancing the timing definitely works--dramatic improvement in fact.

#256 of 297 Gas/Gas Mileage by dchen2003

Jul 14, 2007 (1:17 pm)

I heard some people say some of the gas is not 100% gasoline but with 10% alcohol. Because alcohol has lower energy density that cause lower MPG. Does any one know What brand of gas station use this kind of blend fuel? And what gas station has the best fuel based on your experience.
 
Thank You

#257 of 297 Re: Gas/Gas Mileage [dchen2003] by shipo

Jul 14, 2007 (1:41 pm)

Replying to: dchen2003 (Jul 14, 2007 1:17 pm)
Typically the areas that mandate oxygenated fuels (i.e. most metropolitan areas) also mandate E10 (gasoline with 10% ethanol). If you live in such an area you're out of luck as 100% gasoline cannot be had for love nor money.
 
Best Regards,
Shipo

#258 of 297 Alcohol by imidazol97

Jul 14, 2007 (4:37 pm)

Is alcohol being used in lots of areas now? I thought after he Katrina mess the gov advocated using as much ethanol as possible.

#259 of 297 Re: Alcohol [imidazol97] by shipo

Jul 14, 2007 (8:19 pm)

Replying to: imidazol97 (Jul 14, 2007 4:37 pm)
The proper name for "Ethanol" is "Ethyl Alcohol". Same same.
 
Best Regards,
Shipo

#260 of 297 Re: Alcohol [shipo] by imidazol97

Jul 15, 2007 (5:30 am)

Replying to: shipo (Jul 14, 2007 8:19 pm)
>The proper name for "Ethanol" is "Ethyl Alcohol". Same same.
 
Ethanol and ethyl alcohol are the same chemical, C2H5OH.
 
Are you thinking you are correcting me on something? I don't understand the purpose of your post.

Messages Page 26 of 30

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