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Old 11-01-2005, 12:05 AM
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Is treated 3yr old gas ok to start a new engine on?

Hey all, we're about to start our new 355V8 that we've just freshly rebuilt.

The gas in the tank is about 3 years old and there is a 1/2 a tank of gas in the tank.

I was talking to me dad about draining the tank but he was just going to put loads of gas treatment and other additives in it.

What are your thoughts on this.

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Old 11-01-2005, 12:21 AM
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I wouldn't
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Old 11-01-2005, 02:57 AM
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I wouldn't either. It's not worth it. 3 years is pretty long for gas. Most of those additives need to be put in before storage to stabilize the gas. Gas may be expensive right now, but your new engine is more expensive, so siphon out as much as you can and then fill it with new gas. It'll run a lot better on new gas. Remember, you want to get it running decent quickly so you can break in the cam.
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Old 11-01-2005, 05:42 AM
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siphon it and use it in your lawn mower............or your parts chaser, with 1/2 a tank of fresh stuff added to it.
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Old 11-01-2005, 09:18 AM
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Quote:
Originally Posted by poncho62
siphon it and use it in your lawn mower............or your parts chaser, with 1/2 a tank of fresh stuff added to it.
i second that with a bottle of octane booster
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Old 11-01-2005, 10:49 AM
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Quote:
Originally Posted by 56Maynard
I wouldn't
I agree. Start with fresh fuel.
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Old 11-01-2005, 11:08 AM
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The "fuel fresh" additives have to go in when you store it, not after. Throw it out...its likely varnish by now.
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Old 11-01-2005, 12:02 PM
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Yup the gas Is bad..nope do not use it.. managed to load up an EFI big time trying that.. Get some fresh gas..

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Old 11-01-2005, 01:30 PM
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My '58 Impala had a full tank of 5 year old gas. I put stabizer in the tank and ran the engine with no problem. Now if it's varnished, that's a different story .
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Old 11-01-2005, 02:00 PM
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You're right guys, don't even know why I considered it.

We've siphoned the gas out of the tank and will put in fresh fuel
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Old 11-01-2005, 09:24 PM
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Don't forget to flush it out of the fuel lines.

I wouldn't use it full-strength in any engine. I'm cheap to a fault, though, and I will admit to having used old gas in my old Suburban, but only a gallon or two at a time in a 30-gallon tank of fresh gas.
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Old 11-02-2005, 02:35 PM
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even with new gas the tank has a bunch of loose rust scale

add another fuel filter ($3 clear type) just before the fuel pump

"a full of fuel filter is a dirty filter".....you will be surprised how fast that filter gets dirty....
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