[drperry]

Originally Posted by Need4Camaro

what kind of anti-freeze do you use at -40?

50/50 premix is good for below -40...

I've only started it once that cold without the pan heaters, but regularly below -20 without being plugged in... No CEL, lol.

But I also have a battery tender that's plugged in whenever the pan heaters are plugged in...

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[Kiteboarder85]

I doubt your car will see -40 without windchill. The recent polar vortex is with windchill and your fluids should be fine.

[Scraps0f]

Originally Posted by Kiteboarder85

I doubt your car will see -40 without windchill. The recent polar vortex is with windchill and your fluids should be fine.

drperry's forecast up in AB has a low of -37F on monday, before windchill.

[drperry]

-40 happens at least once or twice a winter, usually. Sometimes for a day or two, sometimes for a week, lol. This year has been good.

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[drperry]

OEM fluids are fine for this.... Though, I would recommend the 0w30 if you don't have pan heaters, or haven't installed a block heater.

Car also goes like snot, lol. But she definitely drinks more fuel on the go stick.

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[Need4Camaro]

Originally Posted by drperry

OEM fluids are fine for this.... Though, I would recommend the 0w30 if you don't have pan heaters, or haven't installed a block heater.

Car also goes like snot, lol. But she definitely drinks more fuel on the go stick.

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Soooooo.... does Fog at -40 really eat your face?
I didn't even know humidity and fog was possible at those temperatures.

[Whocares05050]

I get 12 MPG. What are you complaining about again? LOL

[drperry]

Originally Posted by Need4Camaro

Soooooo.... does Fog at -40 really eat your face?
I didn't even know humidity and fog was possible at those temperatures.

Lol, it does, slowly... Freezing fog happens all the time, though.

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[Kiteboarder85]

Originally Posted by Need4Camaro

Soooooo.... does Fog at -40 really eat your face?
I didn't even know humidity and fog was possible at those temperatures.

Jesus, you need to move buddy!

[gmw0181]

Originally Posted by Need4Camaro

I'm not super concerned about fuel mileage and what not but I couldn't help but notice this.

My commutes are about 7 miles one way, 80% street, 20% highway. A full tank will last me about 2 weeks usually.

Normally I get around 18 - 21 MPG on these trips because its all stop and go and places where heavy acceleration is needed so the reason I bring this up is to state, I don't really get alot of opportunity to see my maximum fuel mileage capabilities. Normally the only time I can do that is when I'm driving to Houston, or Atlanta.

When I first moved to Austin TX mid summer of 18 I was getting around 28 MPG all highway with the A/C running at about 80 MPH on the freeway.

I've done about 5 round trips to and from Atlanta since that period and all of them except my most recent one replicated the same results, between 27 and 30 MPG depending on if Im using the A/C or not.

The last time I went to Atlanta and back to Austin BEFORE my fuel mileage dropped was in November for Thanksgiving and I scored 28 MPG on that trip as well.

Well this time in mid December, I went to Atlanta for the Christmas Holidays and while I was on the road my car developed the infamous torque shudder. I had it serviced in Atlanta because I was going to be there for a month. They did the basic stuff, triple fluid flush, additive. Well, the beginning of January, I head back to Austin - same driving routine, set cruise at 75 and 80 when I get to Texas, similar road conditions, albeit maybe slightly colder than it was in November (It was in the 30's when I came to Atlanta in November.) ... This time I could not get above 24 MPG, while averaging around 22 - 23 for most of the trip, all highway.

Now a number of things could have changed (looking for input on this) -- such as winter blend of fuel (not sure when they roll out with this, but could this have happened after Thanksgiving after my previous trip?), or possibly the colder weather caused for a different fuel map to be used, but was also concerned that the trans flush may have in some way decreased the efficiency of the drivetrain.

Any thoughts?

I noticed my mileage went down and found:

My PVC hose was not snapped down on the front of the engine. Now my mileage is back to normal. Also had a very slight interment miss at cold start idle.

[AmazinglySmooth]

I get 14MPG in my 1SS 1LE. I'm often in stop and go traffic in Austin. I can get higher if I get more time moving, but I never get there during the week.

[Need4Camaro]

Originally Posted by AmazinglySmooth

I get 14MPG in my 1SS 1LE. I'm often in stop and go traffic in Austin. I can get higher if I get more time moving, but I never get there during the week.

I commute around the F.M. 620 area, or basically one of the most hellish roads in Austin. Stop and Go and I usually get between 16 and 18.

[ctrlz]

Originally Posted by gmw0181

I noticed my mileage went down and found:

My PVC hose was not snapped down on the front of the engine. Now my mileage is back to normal. Also had a very slight interment miss at cold start idle.

I assume you mean PCV hose. Did you get a CEL from this vacuum leak, or was the "miss" something you heard?