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Old 03-13-2015, 01:11 PM   #151 (permalink)
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Hello, new Sonata 1.6T Eco owner here. Ill try to get some speed vs FE numbers this weekend. 40-55F temps expected.

I'm coming from earlier Civic hybrid and Sonata 6sp MT. I'm also currently collecting data on the effect of route, stoplights, temps and (head/tail) wind on my daily commute. Are there different threads dedicated to this type of testing?

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Old 03-20-2015, 01:10 PM   #152 (permalink)
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gueff - '19 Mercedes Benz A250 4MATIC AMG
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this graph also compares octane levels which is nice. car was rated for 98.
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Old 03-20-2015, 01:26 PM   #153 (permalink)
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Visusally, that graph tells me that exhaust emissions, cold weather cycles, and 120 km/h driving suffer the most from lower fuel octane...and that slower 90 km/h driving is basically not affected at all.
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Old 03-20-2015, 02:22 PM   #154 (permalink)
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Quote:
Originally Posted by Old Tele man View Post
Visusally, that graph tells me that exhaust emissions, cold weather cycles, and 120 km/h driving suffer the most from lower fuel octane...and that slower 90 km/h driving is basically not affected at all.
probably because it's no longer targeting lambda 1.0. Manufacturers usually design a richer failsafe map for detonation.
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Old 04-16-2015, 05:07 PM   #155 (permalink)
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I did a comparison between speed, instant fuel mileage, and horsepower the other night over flat stretches of my route. Being in the coastal plain of NC, we have many miles of flat land.

The car is a 1998 Ford Escort ZX2, Automatic, with these mods:


Keman intake w/ Spectre high-flow air filter
Tire air pressure set at 60f&r
95% grill block
4" Front air dam from Wally World
Double SV mirror deletion
Air line disconnect thingy
Weight removal (Rear seat, etc.)
Double 5.6K resistor in the IAT (for timing advance)
Spark plugs gapped @ 0.070 (stock is 0.050)
5w20 WalMart synthetic oil
Lighter weight Mazda Miata Aluminum rims
Upsized tires (185/70R14 BlackLion BH15)
- from bald 185/65s to these, I gained ~1.5" in diameter
Added Thrush Turbo muffler
Wheel covers
Wheel Skirts

These numbers are from my calibrated ScanGauge. FE numbers are typically 1-1.5% lower than reported.

Temperature - 73*
Humidity - unknown
Partly Cloudy
SSW wind of 6 mph
Traveling E-SE, smooth asphalt
Engine temp of 205-215
Results are from after 15+ minutes of driving time

40 mph: 45-47 mpg, 11-12 HRP, 1454 rpm
45 mph: 51-53 mpg, 14-15 HPR, 1636 rpm
50 mph: 47-48 mpg, 17-18 HPR, 1818 rpm
55 mph: 42-44 mpg, 20-21 HPR, 1999 rpm
60 mph: 40-42 mpg, 23-25 HPR, 2181 rpm

Here is a graph done to best of my abilities. 1=40, and so forth.

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Old 04-16-2015, 11:01 PM   #156 (permalink)
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Old 04-18-2015, 07:47 AM   #157 (permalink)
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Here my measurements of the Skoda Octavia 2014 with some modifictions.
Measured with scan gauge although this car has its own Fuel measuring system.
The both systems are not always in agreement.

The engine is a 1.6 TDI Diesel and the car has a start/stop function.
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Old 08-14-2015, 12:48 PM   #158 (permalink)
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This is a great thread, thanks for posting everyone. It's really interesting how many of these graphs are linear or in some cases, the mpg holds steady with increasing above 60mph. That really defies logic for most vehicles which are still not perfect aero shapes.
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Old 08-14-2015, 02:51 PM   #159 (permalink)
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Quote:
Originally Posted by janvos39 View Post


Here my measurements of the Skoda Octavia 2014 with some modifictions.
Measured with scan gauge although this car has its own Fuel measuring system.
The both systems are not always in agreement.

The engine is a 1.6 TDI Diesel and the car has a start/stop function.
Is the Skoda Octavia only available in Belgium or is some form also available in the USA?
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Old 08-19-2015, 11:13 AM   #160 (permalink)
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Spanish whip - '12 Seat Ibiza ST E-Ecomotive 1.2 TDI
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Above is a graph for Audi A2 1.2 TDI, as tested by "Tekniikan maailma" magazine in the year 2000. It is in km/h and L/100km



The same graph translated to US units.

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