Brace yourself, Winter commute is comming

[HyperMileQC]

Update : Warmer morning (-8°C). Plugged the EBH for ~3 hours. c°WT showed 31°C. Didn't had to use lights or defrost. SG reported 5.5 LHK AVG.

On the returning trip, I quit only ~1 hour after arriving, so c°WT showed 36°C when starting! SG reported 5.0 LHK after the highway, and it increased to 5.1. I stopped at the gas station to fillup. Results : best tank so far! But bad news is... ScanGauge lied to me . Every trip I logged is wrong. SG showed 5.44 LHK AVG for this tank. But reality is 6.39 LHK... which is under my 40 MPG goal. I calculated that 43.21 MPG is 17.4% higher than the 36.81 I got. I started to calibrate my SG. Calibration will be finished next tank.

I will delete my logs because the numbers are not real. Also note that every AVG LHK I've posted so far are not real, but I'll still report them because they still show if I did well or not, in comparison to the fake AVG.

[HyperMileQC]

I won't use the car for 3 weeks. So thats gonna be good for my $$

Added 4 X-Gauges to my ScanGauge-II. (the OBD-II protocol of the Mazda is CANSF).

-f°TT : Transmission Fluid Temperature (°F).
-c°AT : Ambiant Air Temperature (°C).
-ERT : Engine Run Time (Seconds).
-FL% : Fuel Level (%).
-Want more...

The X-Gauges codes I used are taken from scangauge.com.

[UltArc]

Originally Posted by HyperMileQC

I won't use the car for 3 weeks. So thats gonna be good for my $$

Added 4 X-Gauges to my ScanGauge-II. (the OBD-II protocol of the Mazda is CANSF).

-f°TT : Transmission Fluid Temperature (°F).
-c°AT : Ambiant Air Temperature (°C).
-ERT : Engine Run Time (Seconds).
-FL% : Fuel Level (%).
-Want more...

The X-Gauges codes I used are taken from scangauge.com.

How much were the x guages?

[HyperMileQC]

They were free.

[HyperMileQC]

Update : Didn't posted alot in this thread since I am still in vacation . Will unfortunately return to school monday and I have a fresh tank ahead of me. My new goal is to do under 6 LHK (39.2 MPG (US)). I will try to use P&G on the highway, but last time I tried, the pulses were longer than the coasts... This was a combination of cold weather, lots of wind, poor tire pressure. Maybe I'll do better if the rest of febuary and march are warmer. There is also the fact that with an auto trans, I cannot kill the engine when rolling, and neutral is not "100% neutral" like standarts are.

I will take the mazda until the end of march and then I'll continue to go to school with bicycle & bus. (Half the price ).

[HyperMileQC]

Update : First morning of the school, temps were cold around -16°C. Plugged the EBH for 3 hours 15 minutes, c°WT showed 27°C when starting. Ok I know that what my sg say is not real, but it said 6 LHK for this morning trip. This means that I did more like ~6.8 LHK.

On the return trip I used P&G on the highway. I tested 60-100-60 km/h and so far it looked ok... I will do more test and inflate my tires to 43 PSI (they are actually at around ~40), and I will try 55-95-55 km/h instead to see if I get better results than constant DWL (Target Driving). Anyway, sg said 5.8 LHK (so I got ~6.6 LHK). I used P&G for all the returning trip.

Tomorrow, weather will be around freezing point so i'll do more testing and compare my results. Stay tuned.

[HyperMileQC]

School update : Tried 55-95-55 km/h P&G and it seem weird... My AVG LHK was dropping by 0.1 for each cycle, until I reached 6.7 LHK, then it stayed here all the rest of the trip.

Will try 55-85-55 P&G on the returning trip, if it works well, then i'll continue like this, if not, then bust...

[HyperMileQC]

After testing different P&G on the highway (60-100, 55-95, 55-90, 55-85, 55-80 and 60-80 km/h), I can definitely say that doing P&G on the highway is worse than doing constant DWL (Target Driving) with the Mazda. This can be explained by the fact that the accelerations are around ~20 LHK (80 LOD) and it takes a lot of time to accelerate to the targeted speed, this increase the AVG by ~0.3 LHK, then when I put it in neutral, it lowers the AVG until I reach ~6 LHK and then it stops lowering.

The car slow down so quickly that sometimes, the accelerations are longer than the coasts... I was going 90 km/h going downhill in neutral and the car slowed instead of staying at the same speed or accelerate. This is definitely not good, but this is caused by the automatic tranny and bad aero... The good point is that the better P&G was 55-80 km/h, this prooves that lower speed = lower consumption .

On my last tank, I did no P&G on the highway and P&G in town, the (fake) AVG that my sg reported was aproximatively between 5.0 LHK and 5.6 LHK. I got the same kind of cold weather (between -10°C and -25°C) but doing P&G in the highway portion of my trips dropped my LHK between 6.0 LHK and 6.6 LHK.

Update : This morning was warmer (-8°C when I quitted), c°WT showed 31°C when starting. EBH plugged 3 hours and 20 minutes. SG said 6 LHK for the trip.

On the returning trip, c°WT showed 10°C when starting. SG said I did 8.4 LHK in the first part of the trip (town) before going on the highway. After that I tested P&G and SG said 6 LHK at the end of the trip.

I will stop doing P&G on the highway and will do DWL instead.

This tank will be significantly lower than the last one, my brothers are now on the car insurrance and will drive the car around town to learn how to drive. I have a hard time getting under 10 LHK in town, so I guess that my brothers will do around 15! Hope to get this tank under 8 LHK.

[HyperMileQC]

Update : warm morning (around -1°C) but lot of snow... c°WT showed ?? forgot to check. EBH plugged for 3 hours 20 minutes. SG said 5.8 LHK so around ~6.6 LHK in reality.

On the returning trip, temp was -4°C outside, c°WT showed 1°C. I had to use lights, I didn't use heat. SG said 5.5 LHK so around ~6.4 LHK in reality. I used DWL instead of P&G on the highway and definitely got better results than P&G even in better conditions. Hit ~258 Km today and tank is little bit under the 3/4.

Tomorrow will be another warmer morning but with some snow and wind.

[HyperMileQC]

Update : cold morning (around -10°C) with snow... c°WT showed ?? forgot to check. EBHplugged for 3 hours 20 minutes. SG said 5.8 LHK so I got around ~6.6 LHK in reality.

On the returning trip, c°WT showed 1°C. didn't used lights or heat. SG said 5.4 LHK so I got around ~6.3 LHK in reality. Hit 340.7 km today and FL% (Fuel Level in %) showed 53%, gas gauge shows low 3/4.