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Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4943848
12/05/18 05:17 AM
12/05/18 05:17 AM
Joined: Sep 2008
Posts: 4,083
Southeast Texas
gfh77665 Offline
gfh77665  Offline

Joined: Sep 2008
Posts: 4,083
Southeast Texas
Sir I salute you.

...And I am sure you salute her!

Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4943860
12/05/18 05:58 AM
12/05/18 05:58 AM
Joined: Aug 2009
Posts: 2,268
PA
Gasbuggy Offline OP
Gasbuggy  Offline OP

Joined: Aug 2009
Posts: 2,268
PA
I was hoping my reply would be the first post of page 2 not the last of page 1. Oh well


Cadillac CTS-V 6.2L 10w30PP
Volvo P1800 5w30 Euro L
LR Series III 10w40 VWB
76' 300D Edge 0w40
02 Yukon 10w30 PP
10 Charger Pursuit 5.7L
95 Accord - 386k. Mobil 2 RIP
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4945294
12/06/18 06:44 PM
12/06/18 06:44 PM
Joined: Sep 2010
Posts: 2,212
GA.
ChrisD46 Offline
ChrisD46  Offline

Joined: Sep 2010
Posts: 2,212
GA.
I've used 1 oz. of Seafoam per quart of engine oil and ran for 100 miles or so before an oil change with no engine issues other than the dipstick was darker than before the Seafoam went in ... If it concerns you then ditch the Seafoam (but not the girl - she is a keeper !)


2017 Hyundai Sonata 2.4L GDI 4 cylinder
2010 Hyundai Elantra 2.0L 4 cylinder
2007 Kia Sedona 3.8L 6 cylinder
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4945749
12/07/18 09:55 AM
12/07/18 09:55 AM
Joined: May 2010
Posts: 1,245
Ocala, Florida
racin4ds Offline
racin4ds  Offline

Joined: May 2010
Posts: 1,245
Ocala, Florida
Cute girl, I'd have used the CTS-V in your sig instead of that land yacht hunk of GM junk! lol.

Sea foam did what is was supposed to, darker oil meant it was cleaning and doing its job. However, I never use a thin grade oil when I plan to add a solvent based cleaner like Seafoam... you should go with a 15W40.


Just say NO to thin oils and M1!
05 F350 Powerstroke
05 Hyundai Tucson
08 Legacy GT
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: joekingcorvette] #4945902
12/07/18 01:22 PM
12/07/18 01:22 PM
Joined: Aug 2018
Posts: 279
Georgia
RDY4WAR Offline
RDY4WAR  Offline

Joined: Aug 2018
Posts: 279
Georgia
I have a 2002 Tahoe 5.3L with 237k miles. It's had piston slap since day one, though it only did it on cold starts. What worked for me was switching to an oil with high amounts of moly, especially tri-nuclear moly. I ran Amsoil Signature Series 10w-30 for a while, which has around 240 ppm, and it quieted down a good bit. I recently switched to Driven LS30 5w-30, a PAO/ester oil with around 400 ppm of tri-nuclear moly, and the piston slap is gone entirely. Even with it being 30*F out this morning with frost on the windshield, it still fired right up smooth and quiet.

Keep in mind that just because the oil turns darker doesn't mean it's cleaning. Oil turns black from oxidation. Seafoam is highly susceptible to oxidation. If you added seafoam to engine oil in a container and let it sit on a table for a few weeks, it would turn dark as well. The naphta and mineral spirits in Seafoam will attack the base oil (particularly nitrogen sites), turning the base oil black. It gives the illusion that it's working when in reality it's just smoke and mirrors. It affects the base oil in the same way as fuel dilution.

Unrelated to Seafoam, some ashless dispersants turn dark due to UV exposure (from combustion events) making the oil appear oxidized when it really isn't.

Last edited by RDY4WAR; 12/07/18 01:32 PM.

"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4945966
12/07/18 02:53 PM
12/07/18 02:53 PM
Joined: Aug 2003
Posts: 760
ottawa
nicholas Offline
nicholas  Offline

Joined: Aug 2003
Posts: 760
ottawa
Honestly - next time try BG EPR - - - It worked wonders cleaning the rings from our oil guzzling Audi.
Every used car we buy I throw in EPR - - - - -

I have used Seafoam - -through the intake, in the crank, in the gas.....we tried marvel mystery stuff. They all did nothing. IMO not worth the time and effort at all.

Give it a shot - - and come back to let us know.

Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: RDY4WAR] #4947021
12/09/18 02:17 AM
12/09/18 02:17 AM
Joined: Aug 2009
Posts: 2,268
PA
Gasbuggy Offline OP
Gasbuggy  Offline OP

Joined: Aug 2009
Posts: 2,268
PA
Originally Posted by racin4ds
Cute girl, I'd have used the CTS-V in your sig instead of that land yacht hunk of GM junk! lol.

Sea foam did what is was supposed to, darker oil meant it was cleaning and doing its job. However, I never use a thin grade oil when I plan to add a solvent based cleaner like Seafoam... you should go with a 15W40.



Out of the whole list she only likes the Volvo and the Yukon.


Originally Posted by RDY4WAR
I have a 2002 Tahoe 5.3L with 237k miles. It's had piston slap since day one, though it only did it on cold starts. What worked for me was switching to an oil with high amounts of moly, especially tri-nuclear moly. I ran Amsoil Signature Series 10w-30 for a while, which has around 240 ppm, and it quieted down a good bit. I recently switched to Driven LS30 5w-30, a PAO/ester oil with around 400 ppm of tri-nuclear moly, and the piston slap is gone entirely. Even with it being 30*F out this morning with frost on the windshield, it still fired right up smooth and quiet.

Keep in mind that just because the oil turns darker doesn't mean it's cleaning. Oil turns black from oxidation. Seafoam is highly susceptible to oxidation. If you added seafoam to engine oil in a container and let it sit on a table for a few weeks, it would turn dark as well. The naphta and mineral spirits in Seafoam will attack the base oil (particularly nitrogen sites), turning the base oil black. It gives the illusion that it's working when in reality it's just smoke and mirrors. It affects the base oil in the same way as fuel dilution.

Unrelated to Seafoam, some ashless dispersants turn dark due to UV exposure (from combustion events) making the oil appear oxidized when it really isn't.




That is some GOOD information RDY4WAR. Can you ballpark how many miles you ran the Joe Gibbs oil before it stopped slapping on cold start?


Cadillac CTS-V 6.2L 10w30PP
Volvo P1800 5w30 Euro L
LR Series III 10w40 VWB
76' 300D Edge 0w40
02 Yukon 10w30 PP
10 Charger Pursuit 5.7L
95 Accord - 386k. Mobil 2 RIP
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4949388
12/11/18 09:06 PM
12/11/18 09:06 PM
Joined: Jul 2005
Posts: 10,844
Redondo Beach, California.
dave1251 Offline
dave1251  Offline

Joined: Jul 2005
Posts: 10,844
Redondo Beach, California.
The Delvac should help a bit to quite GM's penny pinching quality. Also you are punching above your weight class. Good job.


make the inside of your engine oil cap white.
don't use.
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4951487
12/14/18 01:39 AM
12/14/18 01:39 AM
Joined: Aug 2018
Posts: 279
Georgia
RDY4WAR Offline
RDY4WAR  Offline

Joined: Aug 2018
Posts: 279
Georgia
Originally Posted by Gasbuggy
Can you ballpark how many miles you ran the Joe Gibbs oil before it stopped slapping on cold start?


About 250 miles.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Seemingly Negative Experience adding Seafoam to oil. 5.3 Yukon [Re: Gasbuggy] #4951506
12/14/18 02:37 AM
12/14/18 02:37 AM
Joined: Oct 2007
Posts: 973
South East Asia
kr_bitog Offline
kr_bitog  Offline

Joined: Oct 2007
Posts: 973
South East Asia
It is the same observation with my mobil 1 oil, once it is diluted, performance degraded fast

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