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Cadillac STS/STS-V: Real World MPG

16 messages,  Last post on Oct 20, 2006 at 2:12 PM

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

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#11 of 16 My 2006 STS by coolguy Apr 30, 2006 (5:35 am)
Just wanted to go on record to say that my 2006 STS is great. I got it in blackwith the black leather interior, and the luxury performance package. Sound system is five stars, performance and acceleration fantastic, etc. The engine doesn't even wake up until its at 80 mph, and is ride is smooth as your road surface. I have about 2500 miles on it now, mostly suburban driving, and overall mileage has crept up to 20.3 mpg. Its not as frugal on gas as I'd like, but I'll bet it will do a lot better on an upcoming interstate road trip. I think the engine is overkill for around town. Replies to this message: jerrymcshane1 (Jul 26, 2006 8:33 am)
#12 of 16 2007 EPA MPG by rayainsw Jul 20, 2006 (2:57 pm)
V8 w/6 speed manumatic = 17 / 27 2006 was \ is: 17 / 26   Oh, well..... - Ray Hoping for a bigger 'bump' in highway mpg ( sigh ) Replies to this message: sls002 (Jul 21, 2006 9:41 am)
#13 of 16 Re: 2007 EPA MPG [rayainsw] by sls002 Jul 21, 2006 (9:41 am)
Replying to: rayainsw (Jul 20, 2006 2:57 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 (8:33 am)
Replying to: coolguy (Apr 30, 2006 5:35 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 (10:01 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. Replies to this message: mnjasper (Oct 20, 2006 2:12 pm)
#16 of 16 Re: Gas mileage [bigmike5] by mnjasper Oct 20, 2006 (2:12 pm)
Replying to: bigmike5 (Oct 20, 2006 10:01 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.

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