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Cadillac STS/STS-V: Real World MPG

16 messages,  Last post on Oct 20, 2006 at 3:12 PM

You are in the Cadillac STS/STS-V Forum.

What is this discussion about? Cadillac STS, Cadillac STS-V, Fuel Efficiency (MPG), Sedan

Messages Page 3 of 3

#13 of 16 Re: 2007 EPA MPG [rayainsw] by sls002

Jul 21, 2006 (10:41 am)

Replying to: rayainsw (Jul 20, 2006 3:57 pm)
Not knowing what the axle ratios are (at least I don't), it is hard to make any judgement on the results. However, after seeing what the six speed did for the Corvette, the results seem about what I would expect. They (EPA) did not list an AWD V8, nor are there any SRX listings yet. If the axle ratios are unchanged from last year, then the results are for the 2.73:1 ratio. The AWD results would be for the 3.23:1 ratio. The six speed should improve performance, even with no axle ratio change, although the 3.42:1 axle ratio was already too low to improve acceleration. I think with the new transmission, a 3.08:1 axle ratio would be closer to optimum.

#14 of 16 Re: My 2006 STS [coolguy] by jerrymcshane1

Jul 26, 2006 (9:33 am)

Replying to: coolguy (Apr 30, 2006 6:35 am)
It's to have a "beater" to run around town in and just keep your "ride" for more extended highway driving. I have a BLK/BLK 18" tire STS V-8 also. The car is powerful and very NIMBLE. I agree the STS is a GREAT car EXCEPT for the "murderous" depreciation factor.

#15 of 16 Gas mileage by bigmike5

Oct 20, 2006 (11:01 am)

OK, so a year has now passed, and if anyone can update now with how their STS is performing mpg-wise I would like to know. I am really close to pulling the trigger on an 06, and the preference is the V-8, for power, but if it is going to be a gas glutton I might opt for the V-6 since my wife will be getting the car anyway. Any updates would be helpful. I just hate to trade a solid 00 Eldo that gets 31 mpg on the highway, and has two years left on an extended warranty, for something that won't do near as well. Info on true mpg from a six or two would also be welcome. Thanks.

#16 of 16 Re: Gas mileage [bigmike5] by mnjasper

Oct 20, 2006 (3:12 pm)

Replying to: bigmike5 (Oct 20, 2006 11:01 am)
2005 1SG AWD. My mileage was terrible, than began improving after about 10 thousand miles. Me or the car? I don't know for sure. I get about 18.5-19 m.p.g. on mostly (70%) highway driving according to the car's mileage computer now. At first I was getting about 13.

Messages Page 3 of 3

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