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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old August 3rd, 2018, 11:44   #196
Blue_Hen_TDI
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Quote:
Originally Posted by chrstian2170 View Post
I got the car 5 days ago and am getting 55 to 57 MPG. Anybody else see numbers like this? It's most highway driving.

They are certainly capable of that. I too have a 2015 Sportwagen, and my best tank was 62.6 mpg (hand-calculated, not the car's highly-optimistic display). You can see all of my fill-ups in my clickable Fuelly signature.
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Old April 14th, 2019, 06:25   #197
ranger pete
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Read the first few, then last few pages of this thread. Will read the rest later.

Some good info, but I do have a nit or two to pick.

It was said that coasting is always more efficient than engine braking. I disagree slightly.

Coasting in neutral uses fuel. Not much, but some. engine braking, in general, uses none.

Therefore if you have any need at all for deceleration leave it in gear.

I have a lot of experience hypermiling manual gassers and I would generally use engine off coasting when possible, bump starting when power was needed.

I am guessing that this might not be a wise idea with a newer TDI due to the emission system. I read somewhere that these things like long drives and that frequent very short drives will wreak havoc with the emission system as it is interrupted while running through its cycle.

EOCing is simulating short drives, so should I avoid it? Or maybe only do it when I can benefit from very long coasts?

I also wonder about using P&G. It is a no brainer for gassers as you always want to be in the full load sweet spot. But diesels don't have this sweet spot, to the best of my knowledge, or do they?

Last edited by ranger pete; April 14th, 2019 at 06:28.
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Old May 18th, 2019, 05:14   #198
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[QUOTE=ranger pete;5499930]Read the first few, then last few pages of this thread. Will read the rest later.
I have a lot of experience hypermiling manual gassers and I would generally use engine off coasting when possible, bump starting when power was needed.

Diesels don't have throttle plates and a high vacuum induction path at low loads (small throttle openings) which is the primary reason for P&G in a gasser
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