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I can't be 100% certain, but I will keep this thread updated. When I first got my car running with the 3L, I was running 19# injectors and the stock SVT throttle body. The car was 100% untuned, but I was getting 25-27mpg mix of city/highway. I'd be at 200 miles right when I was at 1/2 tank. When I installed the 64mm T/B, it seemed to kill my gas mileage. I didn't keep close records at that time, but I also installed the 39# injectors, and got the Xcal2 tune. Well, I was getting between 18-20mpg with the same driving habits. I would then be at ~160miles to the tank when I was at 1/2 full. I had almost ALWAYS gotten my gas at BP, using their 93 Octane Premium fuel. Well, I thought I'd give Shell a shot this last tank. Filled it up with their V-Power 93 Octane, and I just got to 1/2 tank with 196 miles!! I'm going to see how many miles I get to the tank, so I can be a little more sure. But this is the only thing I can attribute to the better gas mileage. Unless the old 65mm T/B I was running that had an air leak, was causing that much of a decrease in MPG. Anybody else using V-Power from Shell, and notice a difference?
Mark
2000 Black CSVT
3.0L Hybrid - 206fwhp & 195fwtq
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Hard-core CEG\'er
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I like the V-Power because it sounds cool.
But didn't notice much if any difference from Mobil or Marathon 93 octane
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Joined: May 2000
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I have no life
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I have no life
Joined: May 2000
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Gimick gas. Nto responsible for mileage increase.
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Joined: Jan 2006
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New CEG\'er
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i changed from 91 octane available everywhere to amoco ultimate 93 octane and increased mileage by 3 miles a gallon. i have done zero maintenance outside of oil changes during the time i have switched and i now get 29.2 mpg and about 98% of my driving is at 80-85 miles an hour. so i definitely say just changeing fuel can make a real difference
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i've used v-powa for a year now and love it. i used wally world for one month and got shyt for gas milage. used BP same. Kroger same. Texaco, same. V-powa always got me better gas milage with same driving habits...
98 CSVT t-red
1737#
cf1 Cowl hood
Centerline Storms
CEG Dragon Run- Oct 13-15
WTB- Vortech S/C kit/ADC Turbo Kit
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Joined: May 2000
Posts: 21,197
I have no life
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I have no life
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Well since an SVT is tuned to take 93.  Running 91 saves you a $1 a fill up.
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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Originally posted by todras:
Gimick gas. Nto responsible for mileage increase.
Like I said, I can't be 100% sure. The only thing I've changed is the throttle body. It's the same size, only this one doesn't have any air leaks. My driving habits are always the same. That means, ripping on it every time I'm in the car. I did fill up once with the new throttle body with BP gas, but still had the lower mileage. This tank being the first with the V-Power, and it's all of the sudden up. I'll keep an eye on it though.
Mark
2000 Black CSVT
3.0L Hybrid - 206fwhp & 195fwtq
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Joined: Jun 2005
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Originally posted by Y2KSVT:
... The only thing I've changed is the throttle body. It's the same size, only this one doesn't have any air leaks. ...
Air leaks = P0171 and P0174 = engine in limp mode = bad gas mileage.
But different brands of gasoline have different injector cleaners, additives, etc. in them. So it is possible that your 3L performs better with Shell brand gasoline.
Last edited by Tony2005; 06/08/06 08:41 PM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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Joined: Mar 2006
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CEG\'er
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CEG\'er
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is it better to stay with a brand of gas...like always filling up with shell instead of mixing it up with amaco, bp and etc.
Black '00 CSVT #4 of 2150
K&N ru-3530, BAT MTF, Magnaflow exhaust, MSDS headers, and optimized y-pipe.
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filling mostly with petro-canada 94
1998.5 Toreador Red/Midnight Blue Contour SVT - #5912/6535 - DOB - 05/11/1998 -
RU-3530/CTA Intake Pipe
MSDS Heaser/Y-Pipe
Magnaflow #10435
9mm Ford racing
SPEC Stage one/Spec Alum. Flywheel
HERE
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