Is regular car oil alright for lawnmowers?

5w-30???Is regular car oil alright for lawnmowers?
NO, regular 30 wt is the best, a detergent oil, 5w-30 is too thin, and will damage the engine,Is regular car oil alright for lawnmowers?
Actually, the answer to this varies with the type of lawnmower engine. For example, the previous answer regarding non-detergent is generally right for some but manufacturers differ.





For example, I have a 20 inch push mower with a 3.5 Hp Briggs and Stratton engine built in 1986 and the instructions state:





';Use a high quality detergent oil classified ';For Service SF, SE, SD or SC';. Detergent oils keep the engine cleaner and retard the formation of gum and varnish deposits';.





Followed by SAE Viscosity Grades stating


use SAE 30 when outside temp is between 40 to 100F


use 10W-30, 10W-40 when outside temp is between


0 to 100F





(as if you're going to be mowing in sub-freezing temps!)





It's probably best to ask a local power mower repair facility for their input as well.
You didn't mention if you were referring to the fuel or crankcase for using the oil. Automotive type oil can be used in the crankcase as long as it meets the manufactures specs. A 2-cycle oil is used when blending fuel on a 2 stroke engine. There is usually a label for the correct mix ratio. Good Luck.
NO NO! use the straight 30w non detergent if you can find it. ask for it where you buy lawn mowers and grab a couple. Your mower will out last every one else's.