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#4580466 - 11/20/17 08:18 PM Wrong oil in engine
WmJ Offline


Registered: 11/20/17
Posts: 1
Loc: Iowa
I put tc-3w two cycle oil in a Briggs mower engine that should have 5w30 oil what might be the consequences if I don't drain the oil and start over.

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#4580484 - 11/20/17 08:34 PM Re: Wrong oil in engine [Re: WmJ]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
There's nothing to worry about if you have a good source for a replacement engine.

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#4580489 - 11/20/17 08:35 PM Re: Wrong oil in engine [Re: WmJ]
MolaKule Offline


Registered: 06/05/02
Posts: 19042
Loc: Iowegia - USA

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#4580496 - 11/20/17 08:39 PM Re: Wrong oil in engine [Re: WmJ]
Taildragger Offline


Registered: 10/17/10
Posts: 437
Loc: SW Florida
Ha! Haven't we been waiting for his?? wink
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#4580503 - 11/20/17 08:48 PM Re: Wrong oil in engine [Re: Taildragger]
kschachn Offline


Registered: 12/26/05
Posts: 9418
Loc: Upper Midwest
Originally Posted By: Taildragger
Ha! Haven't we been waiting for his?? wink

I think he finally made it past the mods.
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#4580520 - 11/20/17 09:01 PM Re: Wrong oil in engine [Re: WmJ]
Panzerman Offline


Registered: 12/16/06
Posts: 4203
Loc: Port Orange, Florida
Two Stroke oil is nothing more than 30 wt oil with dye and additives. Chances are you aren't going to hurt anything especially in a Briggs and Stratton. There is alot of people who run thier used oil in them and they last.
Briggs and Stratton are about industructable. Anything wet and slippery will suffice.
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#4580569 - 11/20/17 09:42 PM Re: Wrong oil in engine [Re: WmJ]
Eddie Offline


Registered: 12/07/03
Posts: 9574
Loc: Florida, Cape Coral
I'd put the correct oil in your mower if it were mine. The additive packages may be and probably entirely different. Ed
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#4580600 - 11/20/17 10:23 PM Re: Wrong oil in engine [Re: WmJ]
Rolla07 Offline


Registered: 11/05/11
Posts: 4740
Loc: MTL, CANADA
Probably takes as long to ask the question as it does to empty out the TCW3 and replace whats meant for it. Run it going forth and keep us updated on how long it lasts smile
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#4580668 - 11/21/17 03:33 AM Re: Wrong oil in engine [Re: WmJ]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
And if you can't find the drain plug, it's that little thing that looks like a female square. Stick the male square in there and turn it to the left to loosen. I hope I didn't violate R/S/P by saying that. hide

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#4581738 - 11/22/17 09:47 AM Re: Wrong oil in engine [Re: Panzerman]
boraticus Offline


Registered: 04/19/09
Posts: 2909
Loc: Canada
Originally Posted By: Panzerman
Two Stroke oil is nothing more than 30 wt oil with dye and additives. Chances are you aren't going to hurt anything especially in a Briggs and Stratton. There is alot of people who run thier used oil in them and they last.
Briggs and Stratton are about industructable. Anything wet and slippery will suffice.


Have to agree.

Lawn mower engines are very resilient and can survive with anything resembling oil in the crank case. If two cycle engine oil can provide the necessary protection for super high revving two stroke engines, I'd be confident that it will also provide more than adequate protection for a lawnmower engine.

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#4581780 - 11/22/17 10:51 AM Re: Wrong oil in engine [Re: WmJ]
dwendt44 Online   content


Registered: 05/17/06
Posts: 3971
Loc: Central Wisconsin
While 2 cycle oil is designed to be burned and has
low ash and minimal other additives, I doubt it will
hurt anything if used for a short while.


My 2
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#4581867 - 11/22/17 12:19 PM Re: Wrong oil in engine [Re: WmJ]
exranger06 Offline


Registered: 01/25/08
Posts: 3911
Loc: Guilford, CT
You can buy a quart of the proper oil for about $2, and you'll only use about half of it to fill the engine, so about $1. You'd have to be an idiot to not put the proper oil in it.
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#4582685 - 11/23/17 08:31 AM Re: Wrong oil in engine [Re: WmJ]
Eddie Offline


Registered: 12/07/03
Posts: 9574
Loc: Florida, Cape Coral
+1. Ed
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CX5 Touring 2.5L :-)

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#4583807 - 11/24/17 04:30 PM Re: Wrong oil in engine [Re: WmJ]
Odd_Ball Offline


Registered: 05/09/16
Posts: 8
Loc: USA
This has to be a troll post. Surely no one is so lazy as to not take the half hour it would take to drain that crankcase and put the correct oil in it.

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#4584246 - 11/25/17 07:31 AM Re: Wrong oil in engine [Re: WmJ]
irv Offline


Registered: 10/08/06
Posts: 1078
Loc: Oshawa, Ont. Canada
I mistakenly, just yesterday, added 5W-20 instead of 5W-30/10W-30 in my lawnmower after an oil change. I think it will be fine, it's Pennzoil Platinum, but, knowing me, I'll likely change it out in the spring, before it's first use, and put at least 5 or 10W-30 in there. crzy
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