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post #1 of 34 Old 05-08-2017, 07:05 PM Thread Starter
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Car engine oil and riding mowers

I changed the oil in my x300 today and found the bottle of JD 10w30 Turf-Gard Multi-Viscosity 4-Cycle Motor Oil and a bottle of 10w30 Penzoil for regular cars. I stopped for a moment and thought. Should I? My gut reaction is NO. My dad said it's the same thing and it doesn't matter. Was it ok that I mixed the two oils? I like to pay attention to instructions for high-priced equipment, so this is bothering me.
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post #2 of 34 Old 05-08-2017, 07:34 PM
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Re: Car engine oil and riding mowers

Oil is oil and it won't know any different.

Pretty sure the Turf Guard carries the same SAE rating so it meets the same spec
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post #3 of 34 Old 05-08-2017, 07:34 PM
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Re: Car engine oil and riding mowers

You should have no issues using regular oil as long as it meets the specs for the engine.

The manual states the following if not using Turf-Gard:

Other oils may be used if above John Deere oils are not available, provided they meet the following specification:
API Service Classification SJ or higher

In the generic Kawasaki engine manual it states SF, SG, SH, SJ or SL class.

In my old JD 175 Hydro I always used Penzoil. That engine never burned a drop of oil even after 25+ years of operation.
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post #4 of 34 Old 05-09-2017, 06:12 AM Thread Starter
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Re: Car engine oil and riding mowers

Thanks for the info!
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post #5 of 34 Old 05-09-2017, 07:11 AM
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Re: Car engine oil and riding mowers

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Originally Posted by nxnla View Post
Was it ok that I mixed the two oils?
To that question, I would say that it's not a good idea to mix them. The additives may or may not work well together.

Since you're not talking a major cost, I would recommend changing the oil again and use a single product for the new oil. If there's a screw-on filter involved, take the filter off and empty the mixed oil out of it and then reinstall it. The small amount of residual oil in the filter (after dumping it) should not matter.

Another tidbit - if you run the tractor in the winter, use 5W-30 oil now and for year-round.

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post #6 of 34 Old 05-09-2017, 09:35 AM
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Re: Car engine oil and riding mowers

It's not going to make a bit of difference. You could use half 10w-30 and half 5w-30 and still no difference in anything you would ever notice.
The important part with a lawnmower is having enough oil in them. Keep them on the full mark. 95% of all homeowners will never wear out a lawn mower engine due to lack of oil changes oil quality or anything else like that. Many people will destroy an engine or shorten its life severely by running it with too little oil in there. Most engines will be replaced or the machine it's on replaced or junked due to a needed repair 8 to 15 years down the road. Almost none of these engines will actually have been worn out from the number of hours used and have no more life left in them.
It makes everyone feel better and sleep better at night to know they have nice clean oil and a quality filter on their machine and to change it at least every season but in reality it will make little difference in the number of hours actually use the mower for in its life.
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post #7 of 34 Old 05-09-2017, 10:22 AM
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Re: Car engine oil and riding mowers

Quote:
Originally Posted by nxnla View Post
I changed the oil in my x300 today and found the bottle of JD 10w30 Turf-Gard Multi-Viscosity 4-Cycle Motor Oil and a bottle of 10w30 Penzoil for regular cars. I stopped for a moment and thought. Should I? My dad said it's the same thing .
Quote:
Originally Posted by matt167 View Post
Oil is oil and it won't know any different.
I imagine the Pennzoil isn't as expensive. As long as the API service rating meets the engine mfg requirements the brand shouldn't matter, although I would spend for a premium brand.

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post #8 of 34 Old 05-09-2017, 05:05 PM
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Re: Car engine oil and riding mowers

I use John Deere oil the cost is about the same as any good oil .
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post #9 of 34 Old 05-09-2017, 05:09 PM
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Re: Car engine oil and riding mowers

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Originally Posted by KHodges View Post
I imagine the Pennzoil isn't as expensive. As long as the API service rating meets the engine mfg requirements the brand shouldn't matter, although I would spend for a premium brand.
No so. My local JD dealer sells a quart of Turf-Gard 10W-30 (TY22029) for $3.71. A quart of Pennzoil 10W-30 at Autozone or Advanced Auto will run you $6.00-$7.00. By comparison Lowes wants $6.38 for a quart of Turf-Gard 10W-30.

So in this case the local JD dealer has the best deal.
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post #10 of 34 Old 05-09-2017, 05:10 PM
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Re: Car engine oil and riding mowers

If there was a problem mixing oils, think how many cars would be laying dead along the side of the road.

Illegally Blind

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post #11 of 34 Old 05-09-2017, 05:25 PM
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Re: Car engine oil and riding mowers

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Originally Posted by Bill Kapaun View Post
If there was a problem mixing oils, think how many cars would be laying dead along the side of the road.
This comment hits the nail dead on the head. Oil manufacturers work to ensure compatibility between different oil formulations. If they didn't, can you imagine the lawsuits and dead engines everywhere?

There is a technical argument that can be made that some oil additives may not play as well with each other as others. But.....that's really something to only obsess over if you are OCD. The real life impacts are negligible.
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post #12 of 34 Old 05-09-2017, 05:38 PM
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Quote:
Originally Posted by TWG1572 View Post
Quote:
Originally Posted by Bill Kapaun View Post
If there was a problem mixing oils, think how many cars would be laying dead along the side of the road.
This comment hits the nail dead on the head. Oil manufacturers work to ensure compatibility between different oil formulations. If they didn't, can you imagine the lawsuits and dead engines everywhere?

There is a technical argument that can be made that some oil additives may not play as well with each other as others. But.....that's really something to only obsess over if you are OCD. The real life impacts are negligible.
+1

Oil is one of those things that 1% of knowledge is based on science, the other 99% is Brand X is horrible because so and so used it and their motor blew way too soon, and Brand Y is awesome because so and so decided to rebuild their engine and it was still perfect inside after 50 years.
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post #13 of 34 Old 05-09-2017, 05:39 PM
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If you guys are buying at autoparts stores then your way overpaying for oil. I just bought 5 quarts mobile 1 full synthetic for $21.00. Shop Walmart for oil and save a ton of ?.
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post #14 of 34 Old 05-10-2017, 12:00 AM
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Re: Car engine oil and riding mowers

Quote:
Originally Posted by Bill Kapaun View Post
If there was a problem mixing oils, think how many cars would be laying dead along the side of the road.
There's no problem with mixing brands of engine oils.

There is a problem with mixing types of oils, such as for hydros. Acceptable fluids for many hydros include motor oil, ATF, both Type A and Type F, and several types of hydraulic fluids.

Compatibility of the fluid additive packages is dependent on the type of fluid. Any brand of Type F ATF can be used to top up a hydro that contains Type F. Do not use Type A ATF or motor oil in the same situation, even though either one is an acceptable fluid.

You can change fluid types when you do a full fluid and filter change as long as at least 90% of the old fluid is drained out.

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post #15 of 34 Old 05-10-2017, 03:21 AM
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Re: Car engine oil and riding mowers

Quote:
Originally Posted by Bill Kapaun View Post
If there was a problem mixing oils, think how many cars would be laying dead along the side of the road.
I just got back from a road trip to Illinois and there were plenty of dead cars on the sides of the roads! (not to say it was the oil now..)

Just sayin!
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