2012-2013 CTS are flex-fuel capable?
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2008-2013 Cadillac CTS General Discussion Discussion, 2012-2013 CTS are flex-fuel capable? in Cadillac CTS Second Generation Forum - 2008-2013; I was reading up on it and it seems that the 2012 and 2013 model year CTS uses the LFW ...
  1. #1
    azianbob is offline Cadillac Owners Member
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    2012-2013 CTS are flex-fuel capable?

    I was reading up on it and it seems that the 2012 and 2013 model year CTS uses the LFW engine, which is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. The LF1 was the engine that was used in the 2010-2011 model CTS.

    Does anyone know if this is true? I didn't see any information in the manual it just says the recommended fuel is 87 unleaded, and websites like fueleconomy.gov also support this. I also did not see a flexfuel badge on the car, which most flexfuel cars have.

    Does anyone know about this?

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  3. #2
    hauler's Avatar
    hauler is offline Cadillac Owners Enthusiast
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    Re: 2012-2013 CTS are flex-fuel capable?

    From wiki
    The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1.
    Applications:
    Year(s) Model Power Torque
    2011–2012 Chevrolet Equinox 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)
    2011–2012 GMC Terrain 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)
    2012-2013 Cadillac CTS 270 hp (201 kW; 274 PS) @ 7000 rpm 223 lbft (302 Nm) @ 5700 rpm
    2012 Chevrolet Captiva Sport 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)

    The operative word in the wiki entry is capable, which doesn't mean warranted for use.

    I looked at my window sticker, and there was nothing about flex. If I wanted to use e85, the first thing I would do is ask the dealer to tell me if it voided the warranty.

    It would also be nice if one of the Cadillac Corp people that follow posts on this website would request that info for us.

  4. #3
    jamiejam1's Avatar
    jamiejam1 is offline Cadillac Owners Fanatic
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    Re: 2012-2013 CTS are flex-fuel capable?

    BUMP! Any New Info or input from GM on this?

  5. #4
    RAB's Avatar
    RAB
    RAB is online now Cadillac Owners Connoisseur
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    Re: 2012-2013 CTS are flex-fuel capable?

    The LF1 (base engine in 2010-2011 m-y CTS) is the 3.0 liter version within GM's high feature SIDI DOHC V6 engine family. The LF1 was replaced by the LFW engine for m-y 2012 (2012-2013 m-y CTS).
    According to wikipedia... "the LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1".

    The LLT (the optional higher HP engine found in the 2008-2011 m-y CTS) is the 3.6 liter version within GM's high feature SIDI DOHC V6 engine family. The LFX, introduced in m-y 2012 (2012-2013 m-y CTS), is an enhanced version of the LLT engine.
    According to wikipedia... "The LFX is an enhanced version of the LLT engine. Introduced in the MY2012 Chevrolet Camaro LS, it is 20.5 pounds (9.3 kg) lighter than the LLT, due to a redesigned cylinder head and integrated exhaust manifold, and composite intake manifold. Other components like the fuel injectors, intake valves, and fuel pump have also been updated. Power and torque are up slightly from the LLT. The compression ratio is 11.5:1. The LFX also features E85 flex-fuel capability".

    http://en.wikipedia.org/wiki/General...Feature_engine

    With the above said/copied-pasted, I would still talk to my dealer before arbitrarily putting E85 into my 2012+ CTS.

    /RAB

  6. #5
    928S is offline Cadillac Owners Connoisseur
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    Re: 2012-2013 CTS are flex-fuel capable?

    According to this archived GM 2013MY document

    http://gmpowertrain.com/Libraries/Pr...1012.sflb.ashx

    LFX's E85 flex-fuel capability is limited to Buick LaCrosse, Cadillac ATS, Chevrolet Caprice PPV and Impala models,
    and LFW is not E85 flex-fuel capable in passenger car (coupe, sedan, wagon) applications.

  7. #6
    next2pool is offline Cadillac Owners Connoisseur
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    Re: 2012-2013 CTS are flex-fuel capable?

    Quote Originally Posted by azianbob View Post
    I was reading up on it and it seems that the 2012 and 2013 model year CTS uses the LFW engine, which is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. The LF1 was the engine that was used in the 2010-2011 model CTS.

    Does anyone know if this is true? I didn't see any information in the manual it just says the recommended fuel is 87 unleaded, and websites like fueleconomy.gov also support this. I also did not see a flexfuel badge on the car, which most flexfuel cars have.

    Does anyone know about this?
    If your fuel cap is yellow, it will be E85 capable. Otherwise not.

  8. #7
    GeneMpls is offline Cadillac Owners Fanatic
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    Re: 2012-2013 CTS are flex-fuel capable?

    Quote Originally Posted by hauler View Post
    From wiki
    The LFW is a flexible fuel version of the LF1, capable of running on E85, gasoline, or any mixture of the two. Output is identical to the LF1.
    Applications:
    Year(s) Model Power Torque
    2011–2012 Chevrolet Equinox 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)
    2011–2012 GMC Terrain 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)
    2012-2013 Cadillac CTS 270 hp (201 kW; 274 PS) @ 7000 rpm 223 lbft (302 Nm) @ 5700 rpm
    2012 Chevrolet Captiva Sport 264 hp (197 kW; 268 PS) 222 ftlbf (301 Nm)

    The operative word in the wiki entry is capable, which doesn't mean warranted for use.

    I looked at my window sticker, and there was nothing about flex. If I wanted to use e85, the first thing I would do is ask the dealer to tell me if it voided the warranty.

    It would also be nice if one of the Cadillac Corp people that follow posts on this website would request that info for us.
    HP should be 318 for the CTS?

  9. #8
    the0ckid82 is offline Cadillac Owners Member
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    Re: 2012-2013 CTS are flex-fuel capable?

    i know this thread is old but i was wondering if any one had looked in to 1. if its just disabled in the ECU and something that can be turned on and also 2 what is actually different between the lf1 and the lfw. i have a 2011 cts wagon with the lf1 motor but id really like to run e85 if possible .. im wondering what it would take to "convert" my lf1 to a lfw. if its something simple like getting new injectors and a software update to me it might be something worth doing

  10. #9
    lord_galathon is offline Cadillac Owners Member
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    Re: 2012-2013 CTS are flex-fuel capable?

    Quote Originally Posted by GeneMpls View Post
    HP should be 318 for the CTS?
    3.6L V6 is 318HP

    3.0L V6 is 270HP

  11. #10
    Lonnies Performance is offline Cadillac Owners Member
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    Re: 2012-2013 CTS are flex-fuel capable?

    You cannot just turn on the flex fuel option. The car must be equipped with the wiring & appropriate fuel sensors to detect the alcohol level in the fuel. If it isn't labeled on the car & have the yellow cap, it isn't compatible.

    As far as upgrading the car for E85, it can be done with the appropriate wiring/sensors, a compatible fuel pump & the appropriately sized injectors to support the fuel. Along with this, the ECM must be reflashed with the proper tune to allow the use of E85. This is commonly done on other GM vehicles, but most use a more common ECM than what Cadillac uses. That is why you don't see support from HP Tuners or EFI Live for our cars.

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