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Sedans Cadillac CTS/CTS-V 2009 CTS
231 messages, Last post on Nov 23, 2009 at 1:06 PM
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Saying 3.6L is not clear about 304HP DI or 265HP Standard engine. That is mainly interesting to establish a pattern, to determine if any combo of options is related to poor or expected MPG. I feel the best way to measure MPG easily and quickly is to monitor the instant MPG display on cruise, on a Flat highway going around 60 or so. If that gets close to the 25-26 EPA, then nothing is wrong for the highway. If that MPG stinks, then something could be wrong and you will have a better argument with service. Stuttering in acceleration also may indicate something not correct. Don't monitor MPG in "Sport Mode" (shifter to the right). If the 263hp engine felt faster than yours, that is another indication of yours not running well.
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Replying to: joey245 (Feb 19, 2009 7:52 am) |
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Replying to: artmbgolf (Feb 23, 2009 10:32 am) Here are the specifics on my CTS 3.6L Direct Injection All-Wheel Drive V6 engine with 304 hp Transmission, 6-speed automatic transmission. Performance Collection, 18" All-Season Tire Performance Package Yes, the 263HP RWD felt more responsive. I will try the highway 60 MPH test and see if I get the 25-26 EPA. thx, -s
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Replying to: blackcadillac (Feb 23, 2009 7:57 pm) Some reporting normal 27ish mpg and others reporting teens, makes it sound like they have a problem or are calculating wrong or just reporting the computer avg mpg. My current 25 mpg highway often is around 15-17 around town. If cruise or steady at 60-70 mph on flat road isn't up in the mid 20's, you might have a problem, especially considering performance doesn't feel good compared to the 263hp engine. I have not driven the DI yet, so I can't talk about the difference in feel. I also wonder if the Michlen tires on FE2 grip well enough, as they are more of a touring tire than a perf all season. |
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Replying to: pao (Feb 23, 2009 9:57 am) I'd be super happy with 23-24,..... I'd be happy with 15/16, but 11.6 consistent seems way off. I have 1400 miles on my CTS(AWD DI 304). Do you think I'll get better MPG as I put on more miles? Thx, - S |
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Replying to: blackcadillac (Feb 23, 2009 8:25 pm) about 5,000 miles. I don't see any way for merely breaking in to increase around 10 mpg. If your commute has lights and stop and go, the avg mpg means very little. The highway run on instant means more right now and may be your best way to convince your service there is a problem. The sluggish running also sounds like a sign something is wrong. I am not a mechanic. I just observe my Cadillacs using the instant mpg and only monitor average for longer highway trips. I have had several Eldorados with the 300hp Northstar, that all could get 25mpg highway at long distance or using the instant mpg monitor at highway speeds. A long shot wild guess is to check your oil level, in case they forgot to fill it up, although if seriously low, the car should warn you. Also make sure the tires are inflated where they should be. |
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Replying to: blackcadillac (Feb 23, 2009 8:38 am)
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Replying to: ctsguy2 (Feb 24, 2009 7:51 am) I also notice the idle flutter. Are you getting 11/12 MPG? My dealer also gave me a all OK, based on diagnostic computer hook up when I first brought it in. Thx, -s
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No offense, but I was kind happy to hear that someone else was having the same issues and concerns. Comfort in numbers I guess. I haven't checked my mileage in the past few weeks, but on a 500 mile highway trip I got an average of 20.5 and a mixed loop of 15. I calculate my own averages as I don't know how accurate the "DIC" really is.
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Replying to: ctsguy2 (Feb 24, 2009 9:02 am) Good luck guys. |
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