…more detail on oil specs and labels.
reading the back label of a Genuine B&S 4L SAE30 label (purchased at Bunnings) and ignoring the sales and marketing teams input.
The label reads
1. Packaged in Australia for Briggs & Stratton Australia Pty Ltd
2. SAE 30* refers to the oil viscosity - https://en.wikipedia...E_International
3. API SG/CF** - all the letters explained here http://www.api.org/p...es#tab_gasoline
Thats it, those 3 points tell you everything you need to know about the oil in the container.
Aside from the hints on change intervals and overfill warnings you can learn no more from the label.
* multigrades have a prefix numeral followed by a W and are made for use in cold climates
e.g.: SAE 10W-30 means that the oil has a low viscosity prior to starting that ramps up until it gets to operating temperature then behaves as an SAE30 spec oil, multigrade oils do not last as long as single grade oils as the thinning additives degrade over time.
** SG is a spec for petrol engines, CF is a spec for diesel engines