Is it all right to use rotella diesel engine oil in your lawn mower?

No, it's generally not recommended to use Rotella T (diesel engine oil) in a lawn mower. While Rotella is a very robust and long-lasting oil, it's formulated for the specific needs of diesel engines, which are different from gasoline engines found in most lawn mowers.

Here's why:

* Different Additives: Diesel oils often contain additives that are not necessary or even detrimental to gasoline engines. These additives can cause problems like:

* Clogging: Some additives can clog the smaller passages in a gasoline engine.

* Increased wear: Certain additives might not be compatible with gasoline engine components.

* Fouling: It could foul spark plugs.

* Viscosity: Diesel oils tend to have a higher viscosity than gasoline engine oils. This thicker oil may not circulate properly in a lawn mower engine, leading to insufficient lubrication and increased wear.

* Detergent Package: The detergent package in diesel oil is designed to handle the soot and other contaminants produced by diesel combustion. In a gasoline engine, this can lead to excessive cleaning and potentially damage.

Lawn mowers typically require a specific type of oil designated for small gasoline engines, usually SAE 30 or 5W-30. Always refer to your lawn mower's owner's manual for the recommended oil type and viscosity. Using the wrong oil can severely damage your engine.