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See link; the OEM part # is a 5.3 OZ. bottle http://www0.shopping.com/xPF-Briggs-Briggs-Stratton-Synthetic-Pressure-Washer-Pump-Oil-5-3-oz-190585GS
How much pump oil goes into a Troy Bilt Pressure washer Model 020242
Some website says 30w non-detergent?
The manual says to buy a bottle from an authorized dealer and shows no amount, however Sears has the replacement parts and a on-line manual which sells the aforementioned oil. It is a full synthetic oil in a bottle which Sears lists as 5.3 oz. That is what I will put in my 01903 pressure washer. Hope this helps.
form_title= Troy Bilt Parts form_header= Make sure your Troy Bilt Mower is running smoothly. Is your mower under warranty?*= () Yes () No What parts do you need?*= _  What is model of your mower?*= _ 
That is the model...
Between 0.5 and 0.75 quarts of oil are needed in a Troy-Bilt pushmower model TB110. The oil is used to cool and lubricate the engine while it is in use.
A Troy-Bilt model TB110 pushmower holds approximately 0.75 quarts of oil. The oil should be changed at regular intervals to ensure the engine works at peak efficiency.
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