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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old October 21st, 2019, 09:28   #1
WED
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Default Preferred rim and tire size for millage ?

Hello all
I'm the Newbe..2015 SE SportWagen tdi 6 speed
I need tires and am now an old man so I am chasing mpg vs corners.
My car has 225/45/17's dia. 24.97
I am thinking about changing the rims to an alloy 15 x 6 and running 195/65/15's dia. 24.98
I also will be buying Low roll resistance tires.
Any specific recommendations ?
Thx in advance
Bill D
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Old October 21st, 2019, 09:58   #2
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That would be the way to go.
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Old October 21st, 2019, 10:09   #3
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I would like to know which of the, very few, stock 15 x 6 VW alloy rims have least drag. I tried to match the ones is saw on Wayne's record breaker but I believe those are some trade secret rims, couldn't find a stock match...

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Old October 21st, 2019, 10:49   #4
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Hybrid Jetta 15" alloy wheels. Those will be the lightest OEM wheel for the larger bolt pattern, not sure what they'd look like on a Golf though, but probably not bad.
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Old October 21st, 2019, 10:54   #5
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Thank you !

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Old October 21st, 2019, 11:00   #6
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I like those. Maybe not to the tune of $900 or so for the set, but they're nice. Wonder what the offset is.
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Old October 21st, 2019, 12:05   #7
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Quote:
Originally Posted by indigobluewagon View Post
i like those. Maybe not to the tune of $900 or so for the set, but they're nice. Wonder what the offset is.
et=50
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Old October 21st, 2019, 12:22   #8
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You'll be spending a lot of money. To recuperate the cost over the miniscule Mpg savings is crazy!


Don't drive like a raped ape and you should get decent Mpg.
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Old October 21st, 2019, 12:25   #9
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Quote:
Originally Posted by WED View Post
Hello all
I'm the Newbe..2015 SE SportWagen tdi 6 speed
I need tires and am now an old man so I am chasing mpg vs corners.
My car has 225/45/17's dia. 24.97
I am thinking about changing the rims to an alloy 15 x 6 and running 195/65/15's dia. 24.98
I also will be buying Low roll resistance tires.
Any specific recommendations ?
Thx in advance
Bill D
i presume your wagen is a TDI? If so you have the 312mm rotors in front. Therefore smallest you can go is a 16" rim. My dad and i have identical 2011 jsw TDI's. Aside from color, rims, and nav. His gets about 1-2mpg better on highway. mine has 225\45r17 his has 205/50r16. and if you have ever realised how your speedo is off by 4? well mine off the other way.
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Old October 21st, 2019, 12:27   #10
Rob Mayercik
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Check the clearance on your current wheels vs. your brakes - depending on what you have on your specific car, I'd think there's at least a chance the 15s wont' fit over your brakes.

In any event, driving technique and proper tire pressure will probably be more cost-effective than blowing $900 on rims and another $400-500 on tires.
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Old October 21st, 2019, 13:19   #11
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They fit. Golfs and Sportwagens with the 1.4 and 1.8T have the same brakes and come with 15s.

However, I think the offset for the GSW wheels are 35, not 50. That may be a problem.
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Old October 21st, 2019, 13:25   #12
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I need new tires anyways so low resistance tires are in my future.
These we're on Wayne's 2015 TDI which he recently got the Guinness record on. I can't read what size they are but they look like 15's to me.
I feel the larger side walls would ride a little more comfortably and I really could care less about looks. I wouldn't buy new but would put the apb out to some contacts and maybe one gets rekt so I can pick up three years or something. Again I'm just having fun here but need new tires...
I also understand that the high mileage tires flex a lot less with silica at all.

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Old October 21st, 2019, 13:32   #13
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Those are the Jetta Hybrid wheels.
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Old October 21st, 2019, 13:34   #14
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Bingo
Thanks again !

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Old October 21st, 2019, 15:51   #15
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Wed, if you want to drive like Wayne's 2015 TDI. Gerdes has been termed a “hyper-miler,” you have to do HYPERMILING which means drafting immediately behind an 18 wheeler, about 15' behind on the highway, going downhill in neutral. You'll go faster downhill but going uphill according to Gerdes as you are going uphill you will drop your speed since keeping up speed will use too much fuel. Don't race away from a stop and try NOT to stop if at all avoidable. The article also mentions sticking to the speed limit. It also means to drive as if you have a raw egg between your foot and the pedals.


You'll piss off a lot of people behind you when it takes you 2-3 minutes to reach any kind of low cruising speed and don't go faster than about 50 Mph, after that the fuel mileage goes down.


But if you enjoy wasting your money on $ 900.00 rims and drive like a just think how much fuel $ 900.00 will buy.


Having said all that, maybe the OP is just a troll trying to stir up the pot !!!
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