Chapter 5: Lubrication; Oil Type And Quantity - MTD P90 series Shop Manual

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Professional shop manual (120 pages)

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Table of Contents

Oil type and quantity

The recommended oil for MTD engines is an SAE 10W-30 oil with an SM API rating or better. The oil capacity for

all of the P90 series engines is 57 fl.oz (1.7 liters).

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If the oil is noticeably thin, or smells of gasoline, carburetor repair may be needed before the engine can

be run safely.

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Check the oil level frequently and change the oil more frequently in severe operating conditions such as

exceptionally deep snow falls.

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Synthetic oil is a suitable alternative, but it does not extend service intervals.

NOTE: MTD recommends the use of petroleum oil during the break in period to ensure the piston rings cor-

rectly break in.

Synthetic vs. Petroleum based oil: To simply look at synthetic oil and to compare it with Petroleum based oil

there is very little difference. However, when you look at the two through a microscope it is easy to see the difference.

Synthetic is made up of smaller molecules. This allows the oil to get into areas that petroleum based oil cannot.