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Our CRV changed it's mind on fuel consumption suddenly.
 

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Sparky
Joined: 08 Dec 2003
Posts: 17236
Location: Portland, OR

5/21/19 8:31 PM

Our CRV changed it's mind on fuel consumption suddenly.

It has been not so good since winter. 26.1-26.5 MPG, stuck there for past 3-4 months approx.

Last fill up 5/8, two days errands, then we left for CA early 5/11 morning with a ride to PDX. Left CRV sitting in the driveway.

Get home 18th, go to store, top off same gas station & park it. First use after top off this am. The car immediately starts the avg MPG climbing. In 5 mile hits 27.4 MPG, and keeps going up. I hit the driveway @ 30.8, ODO reset on the fill up prior to leaving. So in 113 miles I am @ 30.8.

WTF? Not that I am complaining..

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dfcas
Joined: 11 Jan 2004
Posts: 2597
Location: hillbilly heaven

5/22/19 1:21 PM

Has anybody tried ethanol free gas in their car to see if it is worth the premium price over whats generally available? I use it in my power equipment but here its about a dollar extra per gallon. I only use 3 gallons a year:)

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Sparky
Joined: 08 Dec 2003
Posts: 17236
Location: Portland, OR

5/22/19 1:58 PM

I did in TN before coming here. But in OR only Premium is available with no booze and it is way high$$.

In TN when gas was just over 2.00 the reg no booze gas was .18 more. The V6 99 Buick got just shy of 3 MPG better. Our cars today are made for this swill at the pumps, not sure how that plays into the equation. But I figured it was actually a touch cheaper then. Now, not even close.

I also had a flex fuel Sonoma GMC PU. The more booze in the gas the better it ran. It always got much lower MPG on booze. But is was cheaper than gas for a while. Did not save money then, but the PU ran a lot better. Then the E85 went like .60 gal up past the regular, or approx .40 over no booze reg. So we used E1o in the PU and the buick lived on the non booze reg and got just over 30 MPG usually. 30.4 was typical, 274 on bozzed regular. Lot of 'non' stop and go trips living 20 mile west of NashVegas...

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Matthew Currie
Joined: 11 Jan 2004
Posts: 778
Location: Vermont

5/24/19 9:14 PM

Here in Vermont I think they blend the fuel a little differently in winter, and mileage often goes down. It takes a while for stocks to change, and then we usually get better mileage in summer.

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Sparky
Joined: 08 Dec 2003
Posts: 17236
Location: Portland, OR

5/24/19 9:29 PM

It hit 31 and is sitting at 30.4 with short type trips. Store, 15 mile round trips to ride the bike start points...

I think the supposition that all the winter nix refined fuel have cleared the storage tanks has merit.

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walter
Joined: 11 Jan 2004
Posts: 4374
Location: metro-motown-area

5/26/19 5:14 PM

same in OH and MI -- i imagine all of the states that experience a proper winter do likewise.


quote:
Here in Vermont I think they blend the fuel a little differently in winter, and mileage often goes down. It takes a while for stocks to change, and then we usually get better mileage in summer.

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dddd
Joined: 11 Jan 2004
Posts: 3267
Location: NorCal

5/27/19 7:45 PM

It's normal to get lower mileage in winter, if only because of the longer running time on a cold engine and transaxle.

The two mechanical things that I've seen ruin my gas mileage were
1) a faulty thermostat in my Isuzu p/u and
2) a vacuum-retard valve in my VW Rabbit that someone at the dealership attempted to "repair" but didn't understand what they were doing (that resulted in the ignition timing being off while driving, which had a severely deleterious effect on the HP and the MPG.

One more thing about winter driving is that the tires become stiffer, and the air pressure often drifts low in the winter unless there is an electronic reminder.

Here in California it is during the summer months that oxygenates (such as alcohol) in the fuel are increased in order to cut smog.

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Brian Nystrom
Joined: 26 Jan 2004
Posts: 4376
Location: Nashua, NH

5/28/19 5:30 AM

In winter, you also have denser air that increases drag, but has the somewhat offsetting effect of increasing engine horsepower.

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Sparky
Joined: 08 Dec 2003
Posts: 17236
Location: Portland, OR

5/28/19 12:53 PM

It wasn't winter when I left for airport for CA 5/11 getting 26.4 MPG.

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dddd
Joined: 11 Jan 2004
Posts: 3267
Location: NorCal

5/28/19 6:09 PM

Yabbut everybody does 85 on the I-5.

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daddy-o
Joined: 12 Apr 2004
Posts: 3270
Location: Springfield

5/29/19 4:51 PM

Ironic that karma is last word

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