I'm doing an experiment...

"JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t" (jawzx2) 06/30/2014 at 08:49 • Filed to: None

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I put non-ethanol 91 in the FieSTa on Friday, and started driving like I was actually concerned about efficiency. Mind you, I am NOT employing hypermile techniques (coasting, drafting, traffic-light-avoidance, etc...), I shift when the shift light tells me too, I accelerate "lightly" which often means I'm still not the slowest thing in traffic, and I keep it below 65 on the highway. 220 miles into the tank these are the results so far.

Brian Silvestro > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 06/30/2014 at 08:58

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I NEED TO DO THIS

Vicente Esteve > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 06/30/2014 at 09:54

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A little slow motion, but pretty much!

spanfucker retire bitch > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 06/30/2014 at 09:58

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Is coasting really a hypermiling technique? I thought it was just common sense. If I'm approaching a red light, there's no reason for me to continue to accelerate towards it. I just flip it into neutral and coast into it.

JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t > spanfucker retire bitch 06/30/2014 at 10:11

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Well, honestly, neutral coasting is an outdated hypermiling technique. Back in the days of carburation it made a bigger difference as the slower breathing engine sucked in less fuel, but modern fuel injection systems that can detect load and throttle position will virtually halt fuel flow entirely in an in-gear deceleration condition and just let the engine keep being spun by driveline momentum. Neutral idle actually requires some minimal fuel flow to keep the engine from stalling and in most cases will use MORE fuel than decelerating in-gear with a modern engine management system, especially at slow speeds and low load.

spanfucker retire bitch > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 06/30/2014 at 10:22

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Neutral idle actually requires some minimal fuel flow to keep the engine from stalling and in most cases will use MORE fuel than decelerating in-gear with a modern engine management system, especially at slow speeds and low load.

Cool, good to know. Main reason I've always used neutral than just in-gear coasting was because I could maintain higher speed for longer - less parasitic drag from the transmission. Thanks for the heads up.

GTI MkVII > JawzX2, Boost Addict. 1.6t, 2.7tt, 4.2t 06/30/2014 at 10:27

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All of this. I can't even count how many people I've had to explain this too.