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View Full Version : 10w-30 or just 30w


thesargent
07-14-2007, 01:37 AM
would some one please tell me what the "10" is on an oil bottle. would it be bad to use oil just marked with a 30? sorry for the lame question, but thanks for any help:)

Turf Dawg
07-14-2007, 02:13 AM
the first number is the lower viscosity for cooler weather. when starting in cooler weather it is important to use a oil with a 5 or10 in the first number. as the oil warms the viscosity will change to the last number.

cpel2004
07-14-2007, 02:37 AM
So what should I use I live in FL, straight 40 or 5,10, 15- 40. I know I can you either but what is recommend it. My manual says 40 but I cant find a straight 40. tks

Turf Dawg
07-14-2007, 02:43 AM
i would use 10 or 15w-40. it has to get pretty cold to need 5w-30

cpel2004
07-14-2007, 02:48 AM
Hey thanks that was like fast like a IM

Restrorob
07-14-2007, 07:53 AM
Hmmm, No one in this thread mentioned what brand engine they were to run this oil in !!!

Different OEM's, Different Oil Recommendations......

cpel2004
07-14-2007, 09:20 AM
kaw 23 hp air cooled, kaw 23 hp liquid cooled, 13hp air cooled kohler. tks

MowerMedic77
07-14-2007, 09:51 AM
So what should I use I live in FL, straight 40 or 5,10, 15- 40. I know I can you either but what is recommend it. My manual says 40 but I cant find a straight 40. tks

I would use 30wt you can get it at your local Bennett Auto under the Parts Master label, works great have used it for years with no issue.

Mark in MD
07-14-2007, 04:13 PM
Listen to RestroRob above. He knows his stuff.

I'd use whatever the manual says. Different engines are designed and engineered to specific oils that lubricate best with the various clearances within the engines. You can't out-guess the engineers who manufactured the engine.

Check your manual.

Regarding viscosity, the first number is the viscosity of the oil at cold-start. You generally want a thinner oil at cold start, so that it will flow easier as the engine is running cold. A thinner oil, when cold, will lubricate better than a thicker oil.

The second number is the viscosity of the oil at operating temperature. You want a thicker oil when the engine gets hot because the heat will thin it. A thicker oil, when hot, will lubricate better than a thinner oil.

An example would be 10w-30 which is a multigrade oil. It behaves like a viscosity 10 oil when cold, and behaves like a viscosity 30 oil when hot.

SAE 30 is not a multigrade oil, so there's just one number.

You should know that multigrade oils break down faster than regular oils (which means they need to be changed more often). This is because they have additives in them.

Hope this helps.

Restrorob
07-14-2007, 05:11 PM
kaw 23 hp air cooled, kaw 23 hp liquid cooled, 13hp air cooled kohler. tks

Both the air cooled and water cooled Kawasaki's have the same oil recommendations;

See NOTE For using multiweight oil..... I recommend the straight weight for this state.

http://i107.photobucket.com/albums/m314/Restrorob/Kawasaki/KawasakiLiquidCooledOilChart.jpg


You want to run NOTHING but the 10W30 in the Kohler here in this state.


http://i107.photobucket.com/albums/m314/Restrorob/CommandOilRecomendation.jpg

thesargent
07-14-2007, 05:11 PM
thanks everyone esp. you Mark, very helpful. i have a new 15 horse kawasaki. will regular 30w hurt anything? it doesnt get cold here, maybe 40 degrees in the winter.

Mark in MD
07-14-2007, 06:36 PM
As I said, I'd check the manual. Maybe you can find one at kawasaki.com or something. It wouldn't surprise me if RestroRob has access to one. But -- I can tell you that both the older Kawasakis that I am familiar with -- the 12.5 HP and Kawi 14 HP -- both required straight SAE 30. And I can tell you during the few times I did use 10w-30 because I was out of straight 30, the engines consumed the oil much quicker than when I used SAE 30.

You're welcome.

Edit: See Post # 10 -- posted same time you did

Turf Dawg
07-15-2007, 12:02 AM
Well heck. I may start using straight oil in my units also. I have read the reconmindations of the mfg's, but was told by my dealers to run multi-grade in all units with OHV. They said it gets oil to the valves quicker.

Restrorob
07-15-2007, 12:33 AM
Well heck. I may start using straight oil in my units also.


Looks like a Ole Dawg can learn new tricks after all ! :laugh:

themowerman
07-16-2007, 11:04 AM
I always recommend going by the MFGs recommendation. If you are not sure use 10w/30 in OHV engines and 30wt in non OHV engines like the old Briggs and Kaw L-head engines.