 Any experience with Marvel Mystery Oil?, 2.0 is smoking |
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| Ampex351 |
 Sep 24 2021, 01:14 PM
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#1
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Member  Group: Members Posts: 104 Joined: 8-April 20 From: Roseburg, Oregon Member No.: 24,115 Region Association: Pacific Northwest  |
Compression tests were good, leak down was good but the car still smokes during deceleration. Just normal driving. The engine runs very well and I am not ready to rebuild a motor. So....does anyone have any experience using Marvel Mystery Oil or another additive to slow down the smoking?
Thanks! |
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| mihai914 |
Sep 24 2021, 02:24 PM
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#2
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Senior Member Group: Members Posts: 800 Joined: 2-March 05 From: Montreal, QC Member No.: 3,697 Region Association: None 
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Marvel Mystery oil and most leak-stop additives are just mineral spirits that will make the seals swell.
Your issue is most likely due to worn valve guides which are bronze and will be unaffected by the product. If you can run a thicker weight of oil, that might help a little. |
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| Ampex351 |
Sep 24 2021, 02:44 PM
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#3
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Member Group: Members Posts: 104 Joined: 8-April 20 From: Roseburg, Oregon Member No.: 24,115 Region Association: Pacific Northwest |
QUOTE(mihai914 @ Sep 24 2021, 03:24 PM)  Marvel Mystery oil and most leak-stop additives are just mineral spirits that will make the seals swell. Your issue is most likely due to worn valve guides which are bronze and will be unaffected by the product. If you can run a thicker weight of oil, that might help a little. Thanks, I'm running Brad Penn 20-50 now. Will the car be prone to major breakdown if I DONT' do a valve job right away? |
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Posts in this topic
Ampex351 Any experience with Marvel Mystery Oil? Sep 24 2021, 01:14 PM
Ampex351
Marvel Mystery oil and most leak-stop additives a... Sep 24 2021, 02:41 PM windforfun 20W-50 & go Ampex. I used to work for them in... Sep 24 2021, 02:32 PM Ampex351
20W-50
Thank you...that's what Im running. Sep 24 2021, 02:41 PM Ampex351
20W-50
Thanks, I am running 20-50 Brad Penn now... Sep 24 2021, 02:42 PM windforfun
20W-50 & go Ampex. I used to work for them i... Sep 24 2021, 02:47 PM
Ampex351
20W-50 & go Ampex. I used to work for them i... Sep 24 2021, 02:47 PM windforfun
20W-50 & go Ampex. I used to work for them ... Sep 24 2021, 02:49 PM brant marvel is not going to stop the problem.
just live... Sep 24 2021, 02:42 PM Ampex351
marvel is not going to stop the problem.
just liv... Sep 24 2021, 02:45 PM windforfun
marvel is not going to stop the problem.
just li... Sep 24 2021, 02:46 PM brant a little smoke isn't going to leave you on th... Sep 24 2021, 02:57 PM windforfun This is for Ampex351. This is the control room fo... Sep 24 2021, 06:23 PM gord
This is for Ampex351. This is the control room f... Sep 24 2021, 10:48 PM windforfun
This is for Ampex351. This is the control room ... Sep 25 2021, 04:57 PM |
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