High fuel consumtpion
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Junior Member
Joined: Jan 2024
Posts: 6
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From: texas
High fuel consumtpion
hi my car have very high fuel consumption,
car is 3rd gen mazda ,6
year 2019
auto 2.5 engine,
can carbon build up be the issue or something else, do you think chaing gearbox oil and filter and spark plugs will improve fuel consumption,
15 litre highway way above specs again.
10 litres city - specs 5-6 litres max
car is out of warranty 50k miles so far.
car is 3rd gen mazda ,6
year 2019
auto 2.5 engine,
can carbon build up be the issue or something else, do you think chaing gearbox oil and filter and spark plugs will improve fuel consumption,
15 litre highway way above specs again.
10 litres city - specs 5-6 litres max
car is out of warranty 50k miles so far.
Senior Member
Joined: Oct 2018
Posts: 10,613
Likes: 231
From: Northern California
Unless you are getting a check engine light then it is likely either the quality of fuel your using, a change in driving environment or driving habits.
However, don't "ASSUME" that because you have no check engine light that there is not a pending ECU checked problem. This would require looking in a few areas of the ECIU with a good quality specifically shop quality Scanning tool and understanding how to use it and perform diagnostic trouble shooting.
So, if you don't have either then you should go to a service shop and have your Mazda looked at.
However, don't "ASSUME" that because you have no check engine light that there is not a pending ECU checked problem. This would require looking in a few areas of the ECIU with a good quality specifically shop quality Scanning tool and understanding how to use it and perform diagnostic trouble shooting.
So, if you don't have either then you should go to a service shop and have your Mazda looked at.
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