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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old November 6th, 2017, 03:44 PM
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Default Do we need to add Lead

I have a station that sells ethanol free gas. But after we replaced the springs my mechanic friend strongly suggested adding a lead substitute. I can find and add Lead Substitute - $3.50-4.99 per bottle which treats up to 20 gallons. The problem is I need to carry a few bottles with me at all times.

I tried to find CD 2 Lead Substitute (1oz. to 15 gallons - better bargain) but I don't believe its produced any longer.

What is the consensus on the members on adding lead and is the current lead substitutes worth it?

Thanks
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Old November 9th, 2017, 01:24 AM
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Default Re: Do we need to add Lead

Without hardened valve seats you need lead in the fuel. I've been using a lead additive for awhile now and motor is happy. Some members don't use lead and are fine to....but how much do they drive their trucks? How far? How long? How many miles on the rebuild? I drive mine everyday so I use the lead for cheap insurance. It was used back in the day....so no real good reason not to anymore. My two cents.
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Old November 9th, 2017, 01:06 PM
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Default Re: Do we need to add Lead

what brand do you use? Can you post a picture of the bottle?.
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Old November 9th, 2017, 02:39 PM
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Default Re: Do we need to add Lead

this is what i use, buy it at orilys or summit
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Old November 11th, 2017, 05:01 PM
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Default Re: Do we need to add Lead

If the valves and seats haven't been cut, spring pressures and revs are moderate, there shouldn't be any problem with seat recession.
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Old December 4th, 2017, 06:31 PM
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Default Re: Do we need to add Lead

they have not been cut and I drive no higher than about 60.
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