These mpg figures from the epa are hard to swallow. I had a bone stock '93 Z28 auto with 3.23s. It got 14.7 in town. The epa must test cars while seriously babying the throttle.

 

I used to enjoy getting the reaction of folks when I told them that my N/A 99 Cobra with 4.56 gears got 28 mpg on the highway at 70 mph.

Being called a "liar" is the most sincere form of flattery.

 

Actually, I was wondering the spec of a Cobra R.. not an SVT. But thanx for the SVT's mpg specs

 

The Cobra R's also come from SVT. However, we don't know when (or if) the next one will come out. The last one was the 2000 R. I don't remember for sure, but I believe it was rated at 13/18 or some horid numbers like that.

 

Per Edmunds, the Cobra-R was rated 13/18 mpg, but they got 14 mpg.
Edmunds Z06, Viper, Cobra-R comparison

 

Yep, the epa is optimistic as usual. Check out the epa figures vs. what they actually got for the Viper and the Vette. The epa should have a disclaimer that reads, "Our figures obtained with Grandma driving."

 

I know a guy with a vette that swears to 30MPG " LS1"
My LS1, before I started modding it got 29+ on the highway" when i wasnt beating it to death" I got over 400MPG on a tank form florida to here using my AC half the time. Drove it pretty easy though.
The LT1 never got good gas milage. That thing Loves its gas. The MPG on the highway stock was about 25. Best I ever got was 27 but the was not often. In the city it fricking hogs it like there is a whole in the tank.
The LS1 cammed gets better MPG then the LT1 does.

 

I saw a report on the way they test cars for mpg and how usless it was for the normal drive and that they should change it, simulated curve this and percent throttle that. It's possible for some cars to have an advantage in the mgp tests that they don't really have on the street. I seem to remember the article saying Honda really milked/cheated their numbers compared to actual mpg results. The other thing to keep in mind is that the skip shift from first to fourth was only done by GM to sneak around the gas guzzler tax.

I read that GM had a rule that no car could have the gas guzzler tax therefore CAGS was introduced.