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Old 11-05-2013, 06:17 AM   #1
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Spark advance and MPG ?

I actually did a search on this issue and need a more definitive answer ?

With Premium costing an average of 40 cents a gallon over regular
Everyone is stating that its a waste of money to get a lousy 10Hp
thats only available during WOT.

But the confusing part is ?
If Premium Fuel forces the Computer to advance the timing,
Doesnt that net better MPG ? Offsetting the extra cost of fuel

So why run Regular at all, if not only your loose HP
but your MPG actually goes down

Not to mention, Higher Octane engines run much cleaner
saving your valves and pistons from carbon overload.

Plus I actually read somewhere that WOT on regular
is not cool in general as detination is maybe not actually heard
but its not healthy for the engines long term longevity

Again Premium is about 40 cents a gallon extra
which is about an extra $5 a tank.

Solution ? when ordering your favorite fast food fix
Substitute the $2 soda for a cup of water with ice
and skip the $3 Brownie Fudge Delight




You'll loose weight too and go even Faster ~~
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Old 11-05-2013, 02:47 PM   #2
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Advancing the timing with regular fuel will cause pinging and if done too much or too long will harm your engine.
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Old 11-05-2013, 05:23 PM   #3
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Apparently, it's more prevalent than I thought ever possible that when buying their car people mistook the Mustang for a Honda Civic or Toyota Prius.

If the mileage is still low maybe you can argue the innocent mistake and see if you can get your money back and get the car that truly will save you gas and $$$ in the long run.

:/ good luck at the dealership
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Old 11-05-2013, 06:25 PM   #4
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I have run both premium and regular for many tanks and calculated my mileage for both. (By hand) I saw no difference in my mileage with either gas.
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Old 11-05-2013, 07:09 PM   #5
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The mileage will be the same usually. The power will be slightly different.
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Old 11-05-2013, 08:17 PM   #6
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It retards the timing on lower oct number ... Not advance it
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Old 11-05-2013, 10:41 PM   #7
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Quote:
Originally Posted by 2300turboford View Post
It retards the timing on lower oct number ... Not advance it
Exactly
Which can make your engine run less Fuel Effecient.

I personally have only run 93 since the car was brand new
even flipped the Porter that was filling up the car when it came out of Dealer prep a $20 bill
to sneak its first tank as Premium
( all the GTs were getting regular on the lot )

And average about 17 mpg city and highway to work everyday
with 3:73's and 19 inch Tires

And will only Run Premium
Because you never know what may pull up to you ?

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