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18 to 20 oz
Sorry that is not a Briggs & Stratton oil filter part number. No, that is the number of the 18 oz. bottle of 30wt. oil. Filters are 491056 and 492932 and are Fram PH 7575
sae30
The recommended oil is 5w30 full synthetic oil.
straight 30 or a 10w30
5w30
10w - 30
SAE-30
Briggs 19.5 oil filter
Briggs and Stratton only recommend using their own brand of lawnmower oil. This oil is available in stores for around $6 for 18oz. This particular oil is designed to be compatible with air cooled engines.
SAE 30 weight full synthetic oil.
Generally Briggs calls for 30W but you can also use 10w30 especially if you are using it in cool temperatures.