avg mpg went from 19 to 16 after new coils

[M4rk]

11225 is the 2.25" version. I'm sure any decent shop could make an adapter tube or whatever. The Magnaflows fit in perfectly in place of the original mufflers, BTW.. in case the shop tries to say otherwise to rip you off.

 

[LS4me]

Ha, yeah ive had a few 15mpg tanks in the mark 8 when i was in a mood to fly.

Okay ill just live with it, i guess im jealous of those averaging 22+....but then again i have 10% ethanol in my gas, and i havent even checked tire pressure so that could be a factor. There are just too many factors for mpg, but i eventually want 22+ if im driving it normally. I mean my mark got 25 on freeways, this gets 22

Do you think having no mufflers is a factor? Thats really the only think different from my v8 and others on the board. The old owner chopped em off, and put in straight pipes. (just got a ticket for 'modified exhaust' the other day actually )

Dude, you, like me, have to deal with crap CA so-called gasoline. I get MUCH better mileage on gas from most other states!

 

[jrand]

Dude, you, like me, have to deal with crap CA so-called gasoline. I get MUCH better mileage on gas from most other states!

how much of it is ethanol in cali? its like 10% here in ohio, nothin an occasional bottle of fuel treatment doesnt fix.

 

[LS4me]

how much of it is ethanol in cali? its like 10% here in ohio, nothin an occasional bottle of fuel treatment doesnt fix.

The standard 10%. I believe we also have other "clean air" additives. I get pinging on a regular basis......

 

[jrand]

ah i gotcha. you know theres a ton of 'fillr' in there, at least as much as they can get away with. .01% filler probably = billions in revenue over the course of a yr.

 

[Telco]

ah i gotcha. you know theres a ton of 'fillr' in there, at least as much as they can get away with. .01% filler probably = billions in revenue over the course of a yr.

It's not "them", it's CARB. They require gasoline to not actually burn. A lot of cities also call for their own blends, called "boutique blends" of fuel. This will add more to the cost and is why the OEMs have to have such slack programming in their cars.

 

[merlon]

You mentioned pinging,

Wouldnt dropping in plugs that are a heat range colder help with that?

I did it in my supercoupe (supercharged 3.6 tbird) and it helped immensely