Why is my Jetta getting bad gas mileage?

Why is my Jetta getting bad gas mileage?

The fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage. Clogged Fuel Filter: A clogged fuel filter will also cause problems with gas mileage.

Why is my mpg so low diesel?

One of the most common causes of poor fuel economy is the way you drive and the trips that you make. In addition, aggressive driving where you accelerate hard and brake late causes you to flood the engine with extra fuel and therefore use more. To obtain the best mpg, keep your vehicle moving as much as possible.

What was the MPG on a 2011 VW Jetta?

In August of 2011, I took out 2011 Volkswagen Jetta TDI on our Fuel Sipper Smackdown route with the sole intention of getting the inter-office miles-per-tank record. Despite nearly 130 degree temperatures, my heavy right foot and the girlfriend’s insistence on staying hydrated, I managed 642 miles and 45.724 mpg.

How many miles does a VW Jetta get?

In any case, diesel models accounted for 23 percent of Volkswagen sales last month, an increase of 44 percent over the same period in 2011, so there are plenty of empty fuel tanks waiting. Michael Jordan, Executive Editor, Edmunds.com @ 21,554 miles

Which is the most fuel efficient VW Jetta?

Known for their efficiency, simplicity and durability, the Volkswagen Jetta TDI’s produced from ’99-’03 (part of the MK4, fourth-generation cars built from ’99-‘06) are arguably the most fuel-efficient, diesel-powered sedans the German automaker ever produced.

How many miles can a VW diesel engine go?

Perrya is a major car enthusiast and loves sharing his extensive vehicular knowledge with his readers. The VW diesel (TDI) engine is one tough engine capable of going 500,000 miles when maintained. However, it has its issues.