30 weight non detergent.
A Briggs and Stratton 17.5 horsepower engine can use any type of small engine motor oil. A heavy duty motor oil is recommended.
Most single cylinder Briggs engines hold 40 oz of oil. SAE-30 type oil
Ordinary motor oil the brand hardly matters.
SAE 10w30 full synthetic.
it takes 20w50 motor oil
48oz
For a Briggs and Stratton motor 3.5 motor used straight gas and oil in the crank-case, there is no ratio.
SAE30
Mobil 1
This depends on the type of car you drive.
Sae 30 oil
A good quality 30wt is Briggs recommendation