Seafoamed 99 Yukon :)

ezbtr

ezbtr

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May 1, 2002
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3,087
Well I broke down and spent $6.99 for a can of Sea Foam, threw it in Yukon, runs great(can't tell difference yet), just wondering if it's really better than the cheaper B12 Chemtool? :)
 
G

gss036

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Re: Seafoamed 99 Yukon :)

Where did you dump it? Gas/Oil? What you really should have done was sucks the whole can into the the brake vaccum line, let it sit for an hour or so, then run it. If there is any carbon build up in the upper end you will get lots of white smoke for about 15 minutes.
 
Bob_VT

Bob_VT

Moderator & Unofficial iBoats Historian
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Re: Seafoamed 99 Yukon :)

The Chevron (with techron) fuel cleaner works great in my cars......

GM makes a "top end" cleaner that does a great job...... comes with a small hose to make a connection to the GM fuel injection systems.

When you get into cleaning the fuel system you should plan on a new fuel filter after you clean things. Any of the crud that the sea foam (of any other additive) will be traveling towards the engine and get stuck in the fuel filter.
 
ezbtr

ezbtr

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Joined
May 1, 2002
Messages
3,087
Re: Seafoamed 99 Yukon :)

Well after major tuneup and SeaFoam, getting 14-15 mpg city/highway. Wonder if I could squeeze 17 on a long trip at 70??? :)
 
Boomyal

Boomyal

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Aug 16, 2003
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Re: Seafoamed 99 Yukon :)

I have a friend with a 99 'burb 350. Going from Houston to Wa State, we got 17+ mpg consistantly at speeds of 70 mph. At that point his 'burb had about 63k miles on it. I was quite amazed, best I ever got out of my 454 'burb was about 11 mpg.
 
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