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01-13-2014, 05:26 PM | #1 |
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Aging 135i's. Worsening Fuel Econ? Power Down?
Is it typical to have power coming down and fuel economy worsening? I do track my car. I have been doing oil change about every 8000km. Been on Mobil 1. After the latest change, it feels as if my car dropped 1 full L/100km in fuel economy. Never dynoed my car so not too sure about whether any acceleration decrease either...
Any common issues that I should look out for as my car ages? At 77,000km right now. Maybe clutch is starting to go? Please advise on area I should pay attn to. Thanks!
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01-13-2014, 05:29 PM | #2 | |
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01-15-2014, 06:05 PM | #3 |
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So everybody else have awesome power and fuel econ all the way up to 100k miles?
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01-15-2014, 07:07 PM | #4 |
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01-15-2014, 07:54 PM | #5 |
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01-15-2014, 07:59 PM | #6 |
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Old Spark plugs? Injectors?
To me(and to others) this sounds like a classic case of carbon buildup. What "other" problems does your car have that your gonna tell us about? Rough idle? Surging while cruising at a constant throttle position. ???
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01-15-2014, 08:07 PM | #7 |
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I am double your KM and the car is fine, get it walnut blasted like the others have said.
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01-16-2014, 02:44 PM | #8 | |
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01-17-2014, 10:57 AM | #10 |
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I'm at 76k miles and had the carbon build up taken care of twice so far, each time the car feels like it breathes better, especially on the top end. My MPG is around 19 for city driving and if I make road trips I can get 25MPG fairly easy.
No performance mods, I do have Apex Arc 8's on MPSS tires and the ducktail spoiler with carbon rear diffuser. |
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01-21-2014, 05:15 PM | #11 |
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Hmm. I don't really feel the engine having any other issues. Maybe the clutch getting a little weak. Maybe a clutch change in order soon.
I'll look into Carbon build-up and Walnut Blasting. Thanks!
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