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2012 S550 Gas Consumption Gone Wild

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Old Dec 24, 2019 | 04:16 AM
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dinger53
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From: Gulf Breeze, FL
2012 S550, 1989 Chevy 1500 Project
Unhappy 2012 S550 Gas Consumption Gone Wild
About 2 weeks ago after filling my tank, I noticed a few days later my fuel consumption was way off! I had driven about 45 miles and burned almost a quarter tank!
Any thoughts on the culprit causing this issue? Notes: Acceleration seems okay, tires are fairly new, all filters were changed at 50K service. Does seem to idle a little rough though.
I’d appreciate any insight someone may have!
Thanks,
Mark
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