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2006 STS V8 AWD, '95 Ford Ranger
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If you want to keep it running good, lose the Seafoam and drive it like you stole it. The North* motor depends on spirited use to keep its insides in good order.
 

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2002 F55 STS, 2014 Explorer XLT, F-150s
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Follow the posted advice - keep it clean, well-maintained and don't be afraid to intelligently exercise the car to its limits on occasion.

Spend the time and money on running a Top Tier gasoline. Google it.

I work part-time behind the parts counter at a local Western Auto. I try to sell TONS of Seafoam and other snake oils. Google "spiff".

(I, personally, would not run the stuff in my worst enemy's Briggs & Stratton blown-up lawnmower engine.)
 
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2006 STS 1SG & 2007 STS 1SE
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19 Posts
Throttle-body cleaning specifically helps if your car has a tendency to not respond to light accelerator pressure, leading to starts from a stop less gentle than desired. Failure to use Top Tier fuel increases the need for cleaning and potentially increases wear. A throttle plate should not easily wear a groove in its seat, but deposits can be abrasive.
 

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'11 CTS-V Coupe M6, '05 1SG STS4 V8
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376 Posts
Every oil change I'll run a bottle of chevron techron fuel additive in my gas. Seemed to smooth out the idle in my 03 STS so I figure it's doing something so I use it in all my cars.
 

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2002 F55 STS, 2014 Explorer XLT, F-150s
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Again.................... run a Top Tier gasoline in whatever octane floats your boat and you get the TECHRON included.

Google "chevron techron" and "top tier gasoline".
 

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2005 Cadillac STS V8 1SF
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85 Posts
Every oil change I'll run a bottle of chevron techron fuel additive in my gas. Seemed to smooth out the idle in my 03 STS so I figure it's doing something so I use it in all my cars.
I second the use of Techron and/or the use of "top tier" gasoline; a good throttle body cleaning now and again (along with tight plenum bolts) is super easy to do and keeps the N* smooth and responsive.
 

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2002 F55 STS, 2014 Explorer XLT, F-150s
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Every now and then AutoBarn runs a special on TECHRON - last time around I bought a case of 12 for half price.

TECHRON is a powerful fuel system cleaner, not recommended any more frequently than 5,000 miles, particularly if you run a TopTier gasoline.

GM dealerships sell a fuel system cleaner - it used to be 100% TECHRON. I'm not sure just what it is now. If you Google some of the spec sheets on various fuel additives you'll find that most are some proportion of Stoddard solvent, naphtha, mineral oil, and maybe another aromatic solvent. Actually, some pretty nasty stuff.

Read Post #3 again. Google "spiff".
 

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2002 F55 STS, 2014 Explorer XLT, F-150s
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TECHRON is (or seems to be) pretty good stuff when used on infrequent occasions. Seafoam is one of the spiff items - TECHRON is not.

heck - I still keep a quart bottle of Marvel Mystery Oil on the shelf ................
 

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Premium Member
2006 STS V8 AWD, '95 Ford Ranger
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29,366 Posts
If any one of the snake oil products was significantly better that the rest it would be the only one on the market but instead the list is endless. There must be hundreds if not thousands of additives that have sprung on the scene and then faded away over the years. I'll bet there were hustlers selling possum grease and duck butter for the axles of Roman chariots.
 
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