[350 Mag]

Noticed lately my fuel economy has dropped.

After I put bigger tires and levelling kit and 1.5" lift in rear my mileage dropped by 2.5-3 l/ 100 km. This was expected.

But months later now my fuel economy has dropped again and nothing has been changed.

One day I was towing a tailer and getting 12.8 l/100 kms.

2 days later computer said 15.8-17 l/ 100 kms?

Mysterious...

 

[wreedsvt]

Winter diesel coming online in your area? Fuel filters need to be changed?

 

[Laytunes]

Yup winter diesel rolls out in Sept typically. Kerosene content of diesel is increased in the winter so the "calorie content" of the fuel goes down. As well most manufactures remove the 5% bio-diesel component which adds the majority of the lubricity. So if you don't already i'd start using a lubricity additive in the winter.