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#4759386 - 05/17/18 01:40 AM Different weight oil to help bad rings?
sh40674 Offline


Registered: 03/27/16
Posts: 83
Loc: iowa
i've used 5/30 synthetic in almost all of my small engines (unless calling specifically for something else) and never an issue. i usually buy a 5 quart jug of a synthetic 5/30 and that's my small engine oil. Well, i was going to get a new lawnmower this year (push mower) but new windows in the house and a new snowblower this last winter i'm hoping for 1 more year out of my old trusty grass chopper. the last 2 seasons it occasionally blows some blue smoke at start up (not all the time). had it looked at back then and the guy told me the rings were just getting worn, and if i was planning on replacing it anyways no big deal, when shes done just let her go (didn't pay much for it, it's a poulan with a briggs engine). i've mowed twice now, a week ago and today. today i noticed after it warmed up just a slight amount of blue smoke while running... which is kinda new. is there a different type or weight of oil that can help out a little bit? i know it wont fix the problem, just need this mower to last 1 more season if possible

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#4759387 - 05/17/18 01:48 AM Re: Different weight oil to help bad rings? [Re: sh40674]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7485
Loc: S California
It only takes a small amount of oil. Try some 20w-50. You haven't got much to lose.

And you can try removing the spark plug, pour some penetrating oil in the cylinder, turn the engine over and let it sit overnight. Flush it out carefully and then try the 20w-50.

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#4759404 - 05/17/18 03:57 AM Re: Different weight oil to help bad rings? [Re: sh40674]
Olas Offline


Registered: 12/11/13
Posts: 3933
Loc: Manchester, England
Worn rings are worn, only replacing them will help to have less worn rings.

Thicker fluid may leak through the gap more slowly and 'band aid' the symptom but this is not helping the rings.

Piston soak may unstick them (if they're stuck) which could improve compression and reduce consumption, but you'll need to diagnose the issue first.
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#4759418 - 05/17/18 05:19 AM Re: Different weight oil to help bad rings? [Re: sh40674]
dlundblad Offline


Registered: 09/30/13
Posts: 10173
Loc: Indiana
Youíre wanting it to last 1 more season so just keep it topped off with what youve been using and mow.

If you want to tinker, try some cheap 20w50.
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#4759419 - 05/17/18 05:23 AM Re: Different weight oil to help bad rings? [Re: sh40674]
sh40674 Offline


Registered: 03/27/16
Posts: 83
Loc: iowa
i understand that they're worn and wont fix the issue... just thinking of ways for reducing the smoke a bit... get's a little annoying and slightly embarrassing with the neighbors watching laugh

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#4759429 - 05/17/18 05:42 AM Re: Different weight oil to help bad rings? [Re: sh40674]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1905
Loc: SE British Columbia, Canada
Just out of curiosity can you look at the name plate and tell us what year it was manufactured?

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#4759431 - 05/17/18 05:49 AM Re: Different weight oil to help bad rings? [Re: sh40674]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2876
Loc: Wet side WA
It's a Poulan how old?
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#4759470 - 05/17/18 06:48 AM Re: Different weight oil to help bad rings? [Re: sh40674]
Ducked Offline


Registered: 10/25/12
Posts: 4429
Loc: Taiwan
Originally Posted By: sh40674
i understand that they're worn and wont fix the issue... just thinking of ways for reducing the smoke a bit... get's a little annoying and slightly embarrassing with the neighbors watching laugh


Farmers here sometimes stick a knitted work glove on the end of their ancient 2-smoke Kawasaki B2 motorcycle exhausts, though I'm pretty sure they aren't embarrassed by the neighbours watching.

If they were they'd probably take it off, so the neighbours wouldn't be able to see them.

Mow at night?


Edited by Ducked (05/17/18 06:49 AM)

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#4759474 - 05/17/18 06:54 AM Re: Different weight oil to help bad rings? [Re: sh40674]
hatt Offline


Registered: 01/03/12
Posts: 4395
Loc: Florida
Originally Posted By: sh40674
i understand that they're worn and wont fix the issue... just thinking of ways for reducing the smoke a bit... get's a little annoying and slightly embarrassing with the neighbors watching laugh
SAE 30, SAE 40, 15W-40, or 20w-50 will probably help. I wouldn't ever use typical thin 30s like you're using in OPE.
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#4759477 - 05/17/18 06:58 AM Re: Different weight oil to help bad rings? [Re: sh40674]
nap Offline


Registered: 04/27/18
Posts: 430
Loc: Canada
Originally Posted By: sh40674
i understand that they're worn and wont fix the issue... just thinking of ways for reducing the smoke a bit... get's a little annoying and slightly embarrassing with the neighbors watching laugh


You must be young. At my age I donít care anymore what others might or might not think of me. laugh

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#4759480 - 05/17/18 07:03 AM Re: Different weight oil to help bad rings? [Re: Ducked]
Kira Offline


Registered: 08/19/10
Posts: 5406
Loc: Champlain/Hudson Valley
Has anyone here ever done a compression check on a new mower just to establish a base line?

Do a dry compression check then add a squirt of oil.

Is reringing a single cylinder engine a big deal? ....after all, it is a Briggs engine!


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#4759488 - 05/17/18 07:08 AM Re: Different weight oil to help bad rings? [Re: sh40674]
nicholas Offline


Registered: 08/20/03
Posts: 730
Loc: ottawa
The rings could also be gummed up - not necessarily worn.
If your oil control rings are clogged some can be cleaned.

I have had amazing success with BG EPR on an oil drinking audi.

Stuff works VERY well.

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#4759491 - 05/17/18 07:13 AM Re: Different weight oil to help bad rings? [Re: nap]
Dwane17 Offline


Registered: 02/28/10
Posts: 56
Loc: SW Oklahoma
Originally Posted By: nap
Originally Posted By: sh40674
i understand that they're worn and wont fix the issue... just thinking of ways for reducing the smoke a bit... get's a little annoying and slightly embarrassing with the neighbors watching laugh


You must be young. At my age I donít care anymore what others might or might not think of me. laugh


+1

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#4759499 - 05/17/18 07:24 AM Re: Different weight oil to help bad rings? [Re: sh40674]
Char Baby Offline


Registered: 05/25/05
Posts: 10067
Loc: ROCHESTER, NY
I've never been able to slow down the burning in an OPE by using a thicker oil or even that STP or Motor Honey. It all just thins out with the )))HOT((( engine.
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#4759507 - 05/17/18 07:30 AM Re: Different weight oil to help bad rings? [Re: sh40674]
wag123 Offline


Registered: 06/14/11
Posts: 947
Loc: Texas
Most Poulan branded mowers use B&S engines that have aluminum cylinder bores. Rings are not the problem, a worn cylinder bore is the likely problem. Aluminum bore B&S engines will run for years burning oil like this if you keep oil in them. Just use an HD SAE30 motor oil to minimize oil use (don't use a multi-weight motor oil), check the oil level before EACH fuel fill (add as needed but DO NOT OVERFILL), and run it till it blows. You will probably be surprised at how long the mower will run like this. If your neighbors question your smoking mower, tell them you are killing mosquitoes smile


Edited by wag123 (05/17/18 07:47 AM)

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