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For a Briggs & Stratton Intek engine "PH8170"
I believe a straight 30 weight oil will suffice.
48 oz oil capacity
what weight oil for 6.5 engine
SAE 30
I recommend you use SAE 10W30 100% synthetic in any air cooled small engine. Any major brand is fine.
Click the link and find your engine for the exact capacity.
Worn piston rings. Incorrect weight engine oil. Gasoline mixed with engine oil. Crankcase overfilled with engine oil.
SAE 30 weight.
Intek Pro, Vanguard, and I/C engines are for heavier duty Industrial/Commercial applications. The cylinder has a cast-iron sleeve insert. Standard Intek and Powerbuilt have an aluminum cylinder wall. These are for general and consumer use. Diamond refers to a Diamond Bore cylinder, a special preparation of the cylinder for better wear and oil consumption.
SAE 30 weight full synthetic oil.
The 15.5 Briggs does not have an oil filter.