Ways to increase all around fuel mileage.

Michael McDonough · Jul 1, 2024

Any ideas? Mileage was ok, then just started to drop off. Don’t have numbers but it’s about 1/2 of where it was. Checked the usual, tire press, air filter.
It only has 58000 on it. It’s a 2017. Any ideas what to try?

Hamfisted · Jul 24, 2024

Do you have a scanner that'll read live data ? What are your long and short term fuel trim readings. Combined long and short should be less than 10%.
If you installed a K&N oiled air filter take it out and put the stock one back in and clean or replace the MAF sensor. Never hurts to wash and wax the Expy as well. It's a refrigerator going down the highway. Keep the speed at 70 or below too.

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JasonH · Jul 24, 2024

Michael McDonough said:
Any ideas? Mileage was ok, then just started to drop off. Don’t have numbers but it’s about 1/2 of where it was. Checked the usual, tire press, air filter.
It only has 58000 on it. It’s a 2017. Any ideas what to try?

Try keeping RPM below 2500 for a couple of days. If the mpg goes up then it's the right foot causing the issue.

Ways to increase all around fuel mileage.

Michael McDonough

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JasonH

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