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Old 12-04-2016, 05:00 PM   #21 (permalink)
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Originally Posted by oldtamiyaphile View Post
My 875cc Fiat is sitting on 50mpg while Fuelly cars are averaging high 30's, we could talk about 'this one time' all day long. My 2 ton van will cruise along happily at 50mpg too. Keep in mind a lot of Fuelly users don't know how to input MPG data either.
The 50 MPG was not just a one time thing that example was tank average over 500 miles. My point was for having an engine half the size, fewer cylinders and less horsepower, less weight it does not get a lot better MPG.

oldtamiyaphile I don't think the USA ever got the TwinAir engine. When I looked at the US spec. smart car, Fiat 500, Mazda 2 etc.My impression was wow all of those other cars are smaller and don't get noticeably better MPG. My thought was why buy a car that's less roomy does not get better or much better MPG and cost about the same. I would happily drive a 3 cylinder car if we got the 3 cylinder TDI here but that will probably never happen.


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Old 12-04-2016, 10:14 PM   #22 (permalink)
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If that turbo 3cyl with cyl deactivation comes to the states, I might have to finally trade my insight away...

When I had my 2016 civic turbo, all other users were reporting 34-38mpg, while I was sitting at 45. I'm sure I could get 45-50 in a Fiesta rated for 41, especially in a manual, where I can install a kill-switch.
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Old 12-05-2016, 12:35 AM   #23 (permalink)
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If that turbo 3cyl with cyl deactivation comes to the states, I might have to finally trade my insight away...

When I had my 2016 civic turbo, all other users were reporting 34-38mpg, while I was sitting at 45. I'm sure I could get 45-50 in a Fiesta rated for 41, especially in a manual, where I can install a kill-switch.
Did you get 45mpg by Hypermiling?

The thing that amazes me is with all the advances in technology new cars are getting 90s honda fuel economy.
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Old 12-05-2016, 01:47 AM   #24 (permalink)
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The thing that amazes me is with all the advances in technology new cars are getting 90s honda fuel economy.
Apart from the cars growing bigger and heavier at each new generation (a weight reduction at this transition is highly uncommon), other issues such as the gear ratio better suited to standard test procedures over real-world efficiency can also be blamed for that.
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Old 12-05-2016, 03:46 PM   #25 (permalink)
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Did you get 45mpg by Hypermiling?

The thing that amazes me is with all the advances in technology new cars are getting 90s honda fuel economy.
No, I set cruise control on 75 and just went. Stayed off boost as much as possible.
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Old 12-05-2016, 05:06 PM   #26 (permalink)
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A "boost-kill" switch would be VERY handy.
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Old 12-05-2016, 06:52 PM   #27 (permalink)
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But would you be willing to convert it to FWD in order to save weight in the transmission setup?
Would still be RWD, there's still weight to be saved switching from the cast iron 4 speed to a modern alloy 5/6 speed, and lighter diff.

I don't like four cylinder engines, twins and tripples are much more fun, so that narrows my choices a lot.

But it's true the EcoBoost isn't that economical. It scores 4.9l/100km while BMW's Mini 1.2 scores 4.9 and their bigger more powerful 1.5 3cyl gets down to 4.7. Those are NEDC figures, so expect a bigger difference 'real world'.

Plus BMW themselves are saving 300hp is possible from their 1.5:
300+ HP From MINI's New 3 Cylinder Possible According to BMW M - MotoringFile
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Old 12-06-2016, 03:16 AM   #28 (permalink)
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A "boost-kill" switch would be VERY handy.
I...I don't think you know how boost works x3.
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Old 12-06-2016, 09:57 AM   #29 (permalink)
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It can be done though, for example with an electric super charger you'd have a very economical 1L engine on no boost, but still have power for when you really need/ want it. Exhaust gas might be 'free' energy, but the realities of fuel enrichment still make it fairly uneconomical.
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Old 12-06-2016, 10:44 AM   #30 (permalink)
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Just stay out of boost. It's not that hard. Example, I climb a 6% grade on my way home, trying to climb it NA and accelerate it takes ages to gain speed. Say a turbo would enrichen the fuel 40% more but get me up to speed 60% faster, the tradeoff is worth it.

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