Originally posted by Jeb Hoge:
Originally posted by cjbaldw:
Originally posted by TexasRealtor:
Originally posted by TheAlmightyMe:
The '04 with the LS1 is rated at 28 mpg for highway. '05 and up has the LS2 rated at 25. These are two different engines seperated by 50hp and 0.3 liters.
No way will a 6.0 liter 400 hp car get 25 mpg. The automatic even has a $1300 gas guzzler tax. Go here www.gtoforum.com and they will answer your questions.
TR
Have you ever actually owned an LS1/LS2 equipped car? I have, and I can tell you 25MPG is easily attainable on the highway using stock gearing. Heck, my 452rwhp modded LS1 SS Camaro got 21-23MPG highway mileage, and that's ~525HP at the crank with 3.73 gears through a Moser 12 bolt.
Doesn't the GTO cruise around 75-80mph in 6th at 1800rpm?
I've not looked at the gear ratios but all stockers will use pretty tall gears for 5th/6th overdrive. My SS 6-spd ran about 1750RPM at 80MPH stock, it ran around 2000RPM with the 3.73 gears at 80MPH IIRC.
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