VAF adjustment experiment

[Kraig]

I got over 50 mpg my last tank!! A few weeks ago when it was cold I had my worst tank average yet, 42 mpg. I log my fuel usage at Gassavers.org . I'm about 17 down the list with over 47 mpg average!!

[NovaSS]

is that with the A/C on ?

[Kraig]

No..............the A/C needs freon :cry:

[Dave G]

Re: VAF adjustment experiment

Just wondering if the change in weather has influenced your 36 to 42 mpg increase.

It's possible - I'm not going to make any claims until it stays up for several tankfulls.

[ajb999]

Part of the fuel mpg has to do with the winter gas versus regular too. Right now it depends on which station I go to and whether or not they have switched fuel yet.
I hope they all get switched soon. I normally get between 40 and 45 in my 91 5 speed, this winter I was getting about 35-38. I have been back up to 42 depending on where I get my fuel.

I agree, but can't attribute it all to "winter" gas, as I used to, because I noticed my mileage increased last month when we had a warm spell and then fell back again when it turned cold again!
As an estimate I figure about 2 to 2.5 mpg loss due to "winter" gas and another 2-2.5 mpg due to cold weather.

Hey anyone in Canada.
Do you have "winter" gas and if not do you see a difference in mpg based on temperature alone?

Pu241

also, in the winter how many people let their car warm up for around 10 minutes. this also would cut down the mpg.

[pole120]

Re: VAF adjustment experiment

I'm not going to make any claims until it stays up for several tankfulls.

So what's the word??? I may be doing this soon if it proves to work out well for you.

[Dave G]

Re: VAF adjustment experiment

I'm not going to make any claims until it stays up for several tankfulls.

So what's the word??? I may be doing this soon if it proves to work out well for you.

Filled it again just now, got 41.3 mpg. No long freeway trips in that tank full. I got about 46 mpg on the way back from the Ohiostiva spring fling thing (entirely freeway). This is at 3 clicks tighter (I backed off one click several weeks ago because the plugs looked really white - now they have a *slight* tan tint, which looks better to me). So it seems to me I've gotten a solid 5 mpg increase, or 12% (if I'm doing the math right). I'm going to glue the top of the VAF back on and call it a success

[fastivaca]

Would you recommend this for a B6 swap?

[Dodgeih]

What direction do you turn to increase mpg? I thought I read counter clockwise but now I can't find it

[TominMO]

What direction do you turn to increase mpg? I thought I read counter clockwise but now I can't find it

Congrats on resurrecting a 10-year-old thread! :-)

[Dodgeih]

Congrats on resurrecting a 10-year-old thread! :-)

Ha ha yes! Took a lot of scrolling to find the right one to bring back to life