It is Safe to Use a Synthetic 5W-30 in 4-cycle Mower Engines!

RoofTopPigeon · Jan 3, 2017

It is Safe to Use a Synthetic 5W-30 in 4-cycle Mower Engines!
Simply for the fact that 5W-30 Engine Oil's are Designed and Engineered
Too Operate has a 30-Weight Oil; When the Engine is Warm and Running.

Do any of you Small Engine Guy's on this Forum agree?

This information and the Experp.
Included in this photo came Directly from
My Mower's Manual with a Briggs and Stratton 4-Cycle Engine on it.

reynoldston · Jan 3, 2017

I agree, I use it in everything. I use the Amsoil 0W-40 in the winter time. To move snow my equipment gets used very heavy duty use. I would suggest just something a little heavier in the summer time in mowers seeing its all the same price. Your mower might use a little oil with using something that lite.

RoofTopPigeon · Jan 3, 2017

reynoldston said:
I agree, I use it in everything. I use the Amsoil 0W-40 in the winter time. To move snow my equipment gets used very heavy duty use. I would suggest just something a little heavier in the summer time in mowers seeing its all the same price. Your mower might use a little oil with using something that lite.

reynoldston; I may switch to My Mower to the Amsoil 0W-40
Once it gets 10 or 15 or so years old. And the engine tolerances Loosen up.
BUT; My Mower has a Briggs and Stratton on it; and they Recommend using
a Full-Synthetic 5W-30 for the BEST Protection in Outdoor Temps up to 120ºF

And Since my Mower is New as I Just bought it in April of 2016
I'm going to use the Synthetic 5W-30 that's Recommended in my Manual. :thumbsup:

bertsmobile1 · Jan 3, 2017

Any oil within the viscosity ranges specified in your manual will not hurt your engine.
Mower oil will be better than car oil as they have different additive packages.
Try to remember to change your oil on the last mow of the season and by that I mean finish mowing then drain the oil while it is still hot and really well mixed.

I mostly use strait SAE 30 when mowers are out of warranty and am yet to have a customer come back with an engine failure oil related, other than lack thereof or mowing long compound slopes where the pump, slinger was above oil level so pumping air.
If it makes you feel go do it.
If you think it will cause your engine life to extend, it won't
It will reduce engine friction a bit and that is about all.
If your engine ever gets hot enough to cook std oil then the engine is already a write off.

BWH · Jan 3, 2017

I also use 10W-30 synthetic in my mower with a V-Twin Briggs & Stratton from brand new to present, I actually ran that Briggs 1400+ Hrs. mowing in the summer heat and blowing in the winter cold. I sold that mower to a friend (that tells you my confidence in the lubrication) and he has given it a good workout for the last four years. All in all 24 years and 1400* Hrs. on a Briggs Stratton kind of speaks for itself, but with out a good maintenance program I might not have gotten there either.

RoofTopPigeon · Jan 3, 2017

bertsmobile1 said:
Any oil within the viscosity ranges specified in your manual will not hurt your engine.
Mower oil will be better than car oil as they have different additive packages.

If it makes you feel go do it.

If you think it will cause your engine life to extend, it won't
It will reduce engine friction a bit and that is about all.
If your engine ever gets hot enough to cook standard oil then the engine is already a write off.

(i.e. I am Agreed bertsmobile1)

That is Why I am Choosing to use Valvoline's Full-Synthetic 5W-30 High-Mileage Blend
Because Valvoline states that it is possible of providing protection up to 400ºF and they also state that the their High-Mileage Blend is
formulated with more anti-wear additives that STAY in the Oil Longer. :thumbsup:

RoofTopPigeon · Jan 3, 2017

bertsmobile1;

Are Victa; the Best Selling Brand of Push Mower's in Australia?
and if not; what is?

reynoldston · Jan 3, 2017

Yes by all means use the 5W-30 and your own choice of oil. No one agrees on oil anyways. The reason I use the full synthetic 0W-40 in the winter time is my snow removal equipment sits out in a non heated building and I find it starts with a lot less effort on the really cold days and nothing to do with loose tolerances. I am in the repair end of the mower business and not the lawn mowing part of it. Just in my experience I find 5W-30 in lawn mowers just tend to use more oil. You wouldn't do any harm by using the 5W-30 and find any of the dealer I have worked for all use it in new and older mowers.

RoofTopPigeon · Jan 3, 2017

reynoldston said:
Just in my experience I find 5W-30 in lawn mowers just tend to use more oil. You wouldn't do any harm by using the 5W-30 and find any of the dealer I have worked for all use it in new and older mowers.

From the Experp. I pulled out of my Mower's Manual
Briggs and Stratton Says that From their own Company testing that 10W-30's
Tend to use more oil; when used in outdoor tempetures above 80ºF
The Exerp. I Scanned out of my Manual is in Post #1 at the top of this thread. :licking:

RoofTopPigeon · Jan 3, 2017

But I'm sure Their Lab Testing;
is Probably a bit Cleaner condition then real-world. :wink:

It is Safe to Use a Synthetic 5W-30 in 4-cycle Mower Engines!

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