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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Oct-02-2017, 09:20:57 PM   #1
Daily Driver
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Default Alignment Tomorrow -- Full or half tank of gas?

Sorry for the noob question.... is there a preference to the amount of gas in the tank when you get a 4 wheel alignment? I read somewhere that the dealership adds 300# to simulate the driver, so the amount of gas must make some kinda difference.
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Old Mon, Oct-02-2017, 09:23:31 PM   #2
kokgo20
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

I would shoot for 3/4 a tank so it would be something between full and low
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Old Mon, Oct-02-2017, 10:22:06 PM   #3
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

An alignment? No difference really.

Corner balance - different answer. Maybe.
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Old Tue, Oct-03-2017, 03:46:11 PM   #4
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

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Originally Posted by kokgo20 View Post
I would shoot for 3/4 a tank so it would be something between full and low
+1

Good rule of thumb and recommended by all DIY sites that take home alignments to the extreme.

If possible see if you can get away with sitting in the car. It makes a difference of .4 degrees + and - camber for me on the front.

For those that say it makes no difference, I can't really argue. You may feel it or you may not, but if you do enough alignments you certainly will. I'd assume most people don't have the ability to do precise alignments at home so good enough actually is really good enough in most cases.
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Old Tue, Oct-03-2017, 04:28:36 PM   #5
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

I'd shoot for 5/8 of a tank. Assuming you operate the car from 1/4-4/4 of a tank (fill up when it hits the 1/4 mark), your average fuel load will be (4/4-1/4)/2 +1/4 = 5/8 of a tank.
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Old Tue, Oct-03-2017, 06:26:33 PM   #6
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

I think there is a TIS on this somewhere. It specified the amount of fuel in the tank plus weights in the driver/passenger seats. When I had mine done ( with a Hunter m/c) the tech had all this information to hand. Check with whoever is going to do it.
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Old Tue, Oct-03-2017, 06:32:32 PM   #7
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

BMW's specs for the added weight include a full tank of fuel.
In my experience... BMW's alignment specs typically have excess neg rear camber, and shorten tire life as a result. Anything you can do to increase the neg camber 'as measured' will result in more favorable (lower neg) values after returning to normal height. More weight=lower ride height=more neg camber.
If you're interested in a more performance oriented alignment, skip the dealer and find a performance shop!
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Old Tue, Oct-03-2017, 06:59:04 PM   #8
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

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Originally Posted by nowanker View Post
BMW's specs for the added weight include a full tank of fuel.
In my experience... BMW's alignment specs typically have excess neg rear camber, and shorten tire life as a result. Anything you can do to increase the neg camber 'as measured' will result in more favorable (lower neg) values after returning to normal height. More weight=lower ride height=more neg camber.
If you're interested in a more performance oriented alignment, skip the dealer and find a performance shop!
+1 don't do factory spec on the rear. My rear tires were Michilen PSS only last 10,000 miles if that with factory spec. And that wasn't doing burnouts or any fancy tire smoke stuff.

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Old Tue, Oct-03-2017, 08:33:40 PM   #9
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

I like to have about 3/18ths or depending on the ambient temperature, about 27% empty.



just get an alignment man lol
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Old Tue, Oct-03-2017, 09:03:25 PM   #10
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Default Re: Alignment Tomorrow -- Full or half tank of gas?

I think there's way too much thought going into this.. just align the damn thing!
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Discussing Alignment Tomorrow -- Full or half tank of gas? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)