Common Causes of Poor Fuel Economy

I often receive the question "why is my BMW getting such bad fuel economy". This is a very difficult question to answer definitively as there are many things that can play into this. After eliminating driver error I list a few reasons here that could be a possible cause. The ones I listed are all fairly simple to DIY.
I did not list fuel filter and fuel pump in the video however they could be the source of a poor fuel economy problem depending on the model.


Tools and Products I use
Milwaukee Corded Impact Wrench 1/2 inch : https://amzn.to/2urnKWE
BMW Oil Filter Wrench: https://amzn.to/2N9lyJS
O2 sensor socket 7/8: https://amzn.to/2QZJHnl
Shell Rotella Oil 5w-40: https://amzn.to/2uy5RFR
Oil Filter (N52, N54, & N55): https://amzn.to/2FwBYI3
Oil Filter (N20, & N26): https://amzn.to/2tIkLIW
DeWalt Ratcheting Wrench Set: https://amzn.to/2FwBYI3
Pick Tool Set: https://amzn.to/303UAbP
E-Torx Set: https://amzn.to/35BGdws
Power Steering Fluid (E90): http://amzn.to/2yWyaea
Mann Cabin Filter: http://amzn.to/2hBqQxE
Chevron Techron: https://amzn.to/3r7ua5h

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   / @hannahlegge5947  



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