View Full Version : 10w-30 or Straight Oil????

10-11-2004, 08:37 PM
Both my log splitter, generator, and exmark tell me to use 10w-30 oil. My dad works in the steel industry and he sayes that straight 30 will work. Is there any differences? Anything bad about using it?

10-11-2004, 08:45 PM
Follow the manufactures instructions, I'm sure they know what they are talking about.

10-11-2004, 08:48 PM
On the chart thats in the manual has 30 on it.. but from 60 degrees to 120 degrees.. I wont be cutting grass any lower than that..

green with envy
10-11-2004, 09:20 PM
Follow the manual !!!!

10-11-2004, 09:45 PM
At least in this case..

At cold temperature ( like start up, and cold ambient outside temps), 10w30 will flow better than 30 weight. The better the oil flows, the quicker it gets to the bearings, the quicker it gets to the bearings, the longer your engine will last.

10-11-2004, 09:56 PM
Used to use staright 30 to meet man. severe duty requirements. 10W-30 has lower resitence to flow for winter but it never gets that cold here.

10-11-2004, 10:26 PM
I use synthetic 10-30 exclusively - truck - car - WB - extra deck.

I don't think you can wear an engine out with synthetic in it. I change filter and re add to the full mark at 50 hrs. and change everything at 100 on the small engines. They never use a drop. Have one 15 HP Kohler, and one 15 HP Kawasaki. Thanks, Brad

10-11-2004, 10:54 PM
30 wt is fine when it is warm.