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Fading fuel economy

2755 Views 12 Replies 12 Participants Last post by  johnmo
I find that I'm having a hard time keeping my fuel economy above 40mpg. At least according to the DIC. Commute is 90% highway, about 20mi, and I drive like an old man. Each tank seems to be a little lower. The only thing I can figure is that it's been quite hot and I'm running the AC full blast. Is that really enough to have that big of an impact on fuel economy or should I bring this up at my first oil change? Only 3k mi on the odometer right now.
I find that I'm having a hard time keeping my fuel economy above 40mpg. At least according to the DIC. Commute is 90% highway, about 20mi, and I drive like an old man. Each tank seems to be a little lower. The only thing I can figure is that it's been quite hot and I'm running the AC full blast. Is that really enough to have that big of an impact on fuel economy or should I bring this up at my first oil change? Only 3k mi on the odometer right now.
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Don't do this. (drive like an old man)

These small turbo-charged diesel engines like a bit of stick, so once the temperature needle has started to move give it some wellie!

You don't have to plant your foot, but give it a chance to spool up and clear its tubes.

Then switch on the cruise control and let it take care of things.
My experience bears this out some. When I'm really, really careful with the throttle, I can maybe eke out another MPG or so in some situations, but generally the car seems to like running a little faster and deep on the throttle when accelerating.

My last tank was a little lower. I've been running the A/C and not trying much to be efficient. But... "lower" for me is 54 MPG.
 
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