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Old 05-31-2013, 09:24 PM
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30W oil

Can i use 10w30 oil in my lawnmower even though it calls for 30w? What would be downfall to it, if any?

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Old 05-31-2013, 10:44 PM
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Briggs & Stratton ???
If so, you can apparently enter your engine model number and check the user manual to confirm.

For information regarding the oil capacity for your engine, please visit our Oil Capacity FAQ.

Oil Recommendation

SAE 30 40 F and higher (5 C and higher) is good for all purpose use above 40 F, use below 40 F will cause hard starting.

10W-30 0 to 100 F (-18 to 38 C) is better for varying temperature conditions. This grade of oil improves cold weather starting, but may increase oil consumption at 80 F(27 C) or higher.

Synthetic 5W-30 -20 to 120 F (-30 to 40 C) provides the best protection at all temperatures as well as improved starting with less oil consumption.

5W-30 40 F and below (5 C and below) is recommended for winter use, and works best in cold conditions.

Type of oil to use

Use a high quality detergent oil classified "For Service SF, SG, SH, SJ" or higher.

Do not use special additives.

Choose a viscosity according to the table above.
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Old 06-01-2013, 06:53 AM
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i've been using 10/30 in my rider for 8 yrs since new.. still holding 25# pressure at hot idle.. runs ~40# while cutting.
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Old 06-03-2013, 06:51 PM
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You can probably run 10w30 OK but it needs to be a quality oil that can take the heat of an air cooled engine. If loaded the oil temperature can be a lot higher on your mower than it is on your car due to combination of small oil capacity and limited cooling of the exhaust port area resulting in heating of the block and therefore oil.
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