SAE 10w30 Full Synthetic.
Is it an OHV engine? If so they would be loctaed above the piston head on your mower.
Watch this video on YouTube. It will tell you how step by step. http://www.youtube.com/watch?v=NjzX-PUjKmo
It is around a 5 hp. *this is incorrect: the ones they sell currently would be more in the 7.5-8hp range, seeing as an equally featured 190cc briggs and stratton engine is 6.75hp on a lawn mower the additional 15cc bump it up to around 8hp.
how to Change oil on a Briggs and Stratton 6.75 HP
Good question! I don't find any oil filter or mount for one on my Briggs 15 horse OHV
.30
Internal
48 oz
0.004 - 0.006"
Champion RC12YC
The 14.5 hp ohv Briggs & Stratten engines require a 0.30 in gap