Yeah, that was summer. I get about 20 - 22 now highway. But there are other reasons for that =P
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12-26-2014
Yeah, that was summer. I get about 20 - 22 now highway. But there are other reasons for that =P
12-26-2014
Hmmm... Well, I'm on brand spanking new iridum plugs, wires, air filter, fuel filter, O2 sensor, MAP sensor, IAC controller, PCV and EGR valves, intake manifold gasket, exhaust gasket, supercharger gasket... (not to mention 5,000 mile old Michelins all around on a recent balance and rotation). You'd think I'd be getting better than 24.x. Though I'm still getting the Check Engine Light every time I touch the car and maybe the MAF is suspect, since I'm running out of candidates. Would that be having a big impact on fuel economy?
12-26-2014
What code do you get? And yes, MAF affects fuel mileage, along with other things
12-26-2014
The most evil code of them all; P0171Originally Posted by tomtom123
A thought too - whenever I start the car I get a very audible clacking sound from the engine bay which I have always assumed was just the lifters. But Lucas hasn't quieted the problem even a bit. It always goes away after a bit of driving but it is definitely affected by any level of acceleration until it does.
Could I be looking at an injector problem?
12-26-2014
Question for anybody...I'm in Ohio. Does running 89 fuel vs. 93 fuel make a difference in fuel economy. I'm still running around 18 to 19 mpg on completely stock. Thanks in advance.
12-26-2014
Shouldn't effect mpg much.
Will effect piston life.
12-26-2014
Actually I think it does affect fuel economy cause timing decrease and the increase in kr in forced induction motors
Originally Posted by theaceofspades
12-26-2014
You would probably never notice the increase.. But it could save your Pistons so that alone makes it worth it.
Sent from my iPhone using Tapatalk
12-26-2014
I think he was asking about a GT? If it is supercharged, it is much safer to run 93 than it is to run 87 or 89. In a GT, (Naturally Aspirated, except for the non-fleet 2006 - 2007 GT's that came supercharged), I'd just run the 87 or 89 since the higher octane won't matter as much in a N/A engine
12-26-2014
check for vac leaks and try the maf un plugging trick, unplug it, then start the engine.
12-27-2014
Plug it back in while it's running?
12-27-2014
Unplugged it and it ran normally for a few seconds until it the engine started to sputter.
Edit: Code didn't go anywhere.
Last edited by Centauri; 12-28-2014 at 01:17 AM.
12-27-2014
29.2 is the highest I have gotten so far... this is very little city and almost all highway. Premium 93 or 91 octane gas. So far I am happy with it.
12-28-2014
i run 87 in my car, still get 35 on the highway if i drive it right. then one morning warmup its back to 20s, until you reset it going down the highway.
12-29-2014
My stock white gtp gets about 17-18 city driving civilized and i don't know what it gets on the highway because I have yet to drive it on the highway.
My rusty blue gtp is rock solid at 19 mpg all city with me constantly beating on it (has a 3.5 and headers/needs retuned) and last time I had it on the highway (few years ago when I got rid of it) it would get 31 mpg all day long and 35 mpg without the hood
Originally Posted by BoostenGTP
01-02-2015
MY average MPG in my 2000 GTP is 28 on the highway with cruise control on at 80. In the city I get about what you stated.
01-02-2015
My gas mileage right this second is Ohio State just whipped Alabama!! Roll tears roll!!
01-02-2015
Woohoo!
And yet everyone talked about how Alabama wins everything
01-02-2015
my gas mileage (95 octane) is rated at 24-25 mpg in the city, on the Highway(Autobahn) between 15-17 mpg Dia higher at the highest speed.
ok speed limit? Is sealed off at 110 miles,
01-02-2015
That sounds kinda backward but maybe I read it wrong. I'm just trying to figure out for the life of me how to get some better fuel economy out of this thing. I'm not complaining too much though because it's getting the same if not better than my old 2002 S-10 LS 4-cyl.my gas mileage (95 octane) is rated at 24-25 mpg in the city, on the highway between 15-17 mpg Dia higher at the highest speed.
ok speed limit? Is sealed off at 110 miles,
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