Air Con.....Whats it cost to run

paul2468 · **Joined:** Fri Aug 15, 2014 11:13 am **Posts:** 60

Been sweating my wots it's off the last few days so have decided to wind the windows up and switch the air con on....a friend told me that running it all day would make a big dent on the mpg that i get.....is this true ?

matty86 · **Joined:** Fri Feb 21, 2014 8:53 pm **Posts:** 318

I think it does cost a bit more!..anyway are you really that bothered on cost in 25-29c heat lol? in heat like this their's nothing worse than sitting in a roasting cab! tx's are even worse!

grandad · **Joined:** Tue Apr 03, 2007 11:27 pm **Posts:** 20123

It would depend on how far you were driving and how fast you are going. Having the windows open increases the drag on the car and so it will also lower your MPG.

bloodnock · **Joined:** Thu May 03, 2007 8:15 pm **Posts:** 9170

About 2 MPG less with Aircon on...but the Weight of your passengers, Incorrect tyre Pressures and more Importantly your driving style will all individually contribute more to MPG loss than enjoying the benefit of A/C ever will.

So, Chill out and don't worry.

sasha · **Joined:** Tue Sep 21, 2010 7:35 pm **Posts:** 1855

It's reckoned AC uses about 10-15% more fuel.
However on my new car the AC is electrically driven and makes no difference (or very,very little) on fuel use. It does seem to reduce the power from the engine though.

Never used to use the AC, now I leave it running all the time - when parked up the engines off and running on battery power so zero impact on fuel !

jozefbloggz · **Posted:** Fri Jul 03, 2015 8:13 pm

paul2468 wrote:

Been sweating my wots it's off the last few days so have decided to wind the windows up and switch the air con on....a friend told me that running it all day would make a big dent on the mpg that i get.....is this true ?

just switch it on and be comfortable.who cares about an extra couple of pennies a mile

:roll:

wannabeeahack · **Posted:** Fri Jul 03, 2015 9:05 pm

sasha wrote:

It's reckoned AC uses about 10-15% more fuel.
However on my new car the AC is electrically driven and makes no difference (or very,very little) on fuel use. It does seem to reduce the power from the engine though.

Never used to use the AC, now I leave it running all the time - when parked up the engines off and running on battery power so zero impact on fuel !

Seems my Superb has this type of AC drive, we shall soon find out

Sussex · **Posted:** Fri Jul 03, 2015 11:10 pm

paul2468 wrote:

Been sweating my wots it's off the last few days so have decided to wind the windows up and switch the air con on....a friend told me that running it all day would make a big dent on the mpg that i get.....is this true ?

If it costs ten times what it does i would still run with my aircon on.

But generally it costs about the same as driving with the windows down.

I know which I would prefer.

Chris the Fish · **Posted:** Sat Jul 04, 2015 11:42 am

Sussex wrote:

If it costs ten times what it does i would still run with my aircon on.

But generally it costs about the same as driving with the windows down.

I know which I would prefer.

Would be nice to have the choice, but it should be repaired on Monday on the warranty. viewtopic.php?f=8&t=25028&start=40

wannabeeahack · **Posted:** Sat Jul 04, 2015 10:47 pm

I wish I had a proper tilt/slide metal sunroof now

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Air Con.....Whats it cost to run

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