I have Fender Stratocaster Standard USA 1997.
My G string goes out of tune when I bend and goes kinda back in tune when I push tremolo bar down. I know for sure that the problem is not the string tree, I changed a sadless with my friends who doesn't have this problem but it didn't help, I think it's not the nut becouse I lubricated it with a lot of different products and that didn't help so I don't know where the problem is. My tremolo setup is pretty good because i can push it down really agressive and strings won't go out of tune, only when I bend G string. I'm really freaking out.

This is not my tremolo, I don't have a camera to take a picture of it but my tremolo is the same:
http://1.bp.blogspot.com/-KK8f8hBse8g/T ... m_trem.jpg

This isn't me but I have the same problem:
http://www.youtube.com/watch?v=VUJOdtKUSwM

Have you lubricated the 2 posts the bridge contacts? Are the contact points, bridge to posts, excessively worn.

Check the springs and lubricate the holes on the block they connect to.

Normally I use three black color Fender springs for that model in the Straight ||| pattern. The silver are a bit to stiff for that bridge.

just sounds like the g string is binding in the nut to me. if its tight enough lube has almost no effect. if graphite ( pencil lead) doesn't work you probably need someone to widen the nut slot.

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How old is the nut? The G slot may just need to be cleaned out with a stiff brush and some naphtha. You get too much gunk in there and your nut may bind.

Hi there - sorry to say I did not bother to read /watch your post thorough . But I'm sure you get a lot of answers here - or try to find an other of this guys vids - he is clever
http://www.youtube.com/watch?v=O0Oyc6slYRc

A-man

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A-man

I tried cleaning the nut it is better a bit but it still goes out of tune, I'm going to lubricate the bridge.
I have 3 back springs in the back.

I lubricated tremolo but it didn't help.
I think that holes on the block are to deep and strig gets stuck in there somewhere but I don't know how to fix that.
I'm positive that it's not the nut because I widened the nut at a guitar store today.

I'd say it's the nut slot isn't quite wide enough. Do you play with 10 gauge strings or bigger? I had the same problem on my Am Deluxe when it was new. I simply took a piece of a D string and ran it back and forth in the G string slot a few times. Hope this fixes your problem.

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2010 American Deluxe Strat Sunset Metallic - Lindy Fralin Blues Specials in the neck and middle, Dimarzio AT-1 humbucker in the bridge.
PRS Custom 22 with solid rosewood neck
Mesa/Boogie Electra Dyne 1x12 combo
DRRI

I play on 10 gauge

I play on 10 gauge strings also. Try widening your nut slot just a hair. It worked for me.

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2010 American Deluxe Strat Sunset Metallic - Lindy Fralin Blues Specials in the neck and middle, Dimarzio AT-1 humbucker in the bridge.
PRS Custom 22 with solid rosewood neck
Mesa/Boogie Electra Dyne 1x12 combo
DRRI

I widened the nut but that didn't help

Sure sounds like binding in the nut. Take the g string off your guitar. Hold it between your two hands and press it into it's nut slot. Push down hard to simulate the down pressure present when it's installed on your guitar and tuned to pitch. Now, pull the string back in forth in the slot. You should be able to slide it back and forth about three inches or so and still maintain good down pressure.

The string should glide freely back and forth. If there's dragging, you can expect to have tuning issues. If you're not sure, try doing the same thing with some of the other strings that are not having tuning issues.

If you find there is binding as you perform this test on your g string, then the slot must be modified. That's a little bigger subject than I want to discuss here, but diagnosis is a big part of the cure. The bottom of the slot may have a bad shape that pinches the string, etc.. If you don't have the skills and/or tools to accomplish the fix, then the next trick is to find a good pro. And that can be a BIG trick.

I now know for sure that it is not the nut, i swichet to 9 gauge and I still have the same problem, I wrote 2 times that I have widened the nut. I think it is tremolo, but I don't know what. I now have 5 springs in the back.

You can live the rest of your life thinking it's the trem if you want to. Good luck with that.
Just because you switched to a 9 first, doesn't mean the bottom of the g string nut slot is formed correctly and not causing binding.

I knew it was't the nut, I put a different tremolo and it is fine now.