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GLK-Class (X204) Produced 2008-2014

ANYONE TRY ZMax?????

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Old Aug 28, 2009 | 03:02 PM
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numero uno
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From: near Hershey
2010 GLK350 AWD 2008 C300 AWD (traded).
ANYONE TRY ZMax?????
My GLK gas mileage is not very good at 15 to 21. Zmax supposedly increases fuel mikeage. Anyone give it a try?
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Old Aug 28, 2009 | 03:33 PM
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NYCGLK
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GLK 350 / Porsche 993
15-21 seems normal for this type of a car. I get about 18mpg on average. Have no idea what zmax is, but I'm putting BP Ultimate and nothing else.
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Old Aug 28, 2009 | 03:58 PM
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EnigmaAW
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2021 G63
didn't the window sticker say the glk gets 16c & 22h? your about right on. i average 18-20 most of time.
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Old Aug 28, 2009 | 04:01 PM
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2013 GLK350 4matic
Don't use any of those additives, they can cause damage and provide no good...I would slightly change your driving habits, make sure tires are properly inflated etc...

this is a great website for reference
http://www.cleanmpg.com/forums/showthread.php?t=1510
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Old Aug 28, 2009 | 04:09 PM
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F18BEN
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2026 BMW 550e X DRIVE, 2024 GLE 450e SUV
I agree, stay away from all additives.
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Old Aug 28, 2009 | 04:23 PM
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98 Black C43 , 12’ ML 350 Blutec
Look around and see if anyone offers a aftermarket intake....or swap your filters for K&N's.
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Old Aug 28, 2009 | 09:50 PM
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Jaydeath
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2013 SL550, 2011 E550 Cab, 2013 E350 Sedan
putting an aftermarket air filter is a real pain inside of an MB :-X wayyyyy too many screws in tight spaces.
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Old Aug 29, 2009 | 08:16 AM
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zelko
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2012 C350 2DR Coupe
This is an SUV after all, albeit a small SUV with full time all wheel drive - most in this forum didn't buy the GLK for good fuel economy

If that's your only complaint, you are in good shape...enjoy it!
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Old Aug 29, 2009 | 11:58 AM
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yeah I wouldn't add it...in the latest the star magazine (mercedes benz club of america magazine) they recommend that you do not add any additives like that to your engine.
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