See also:

Engine oil
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Octane Recommendations
“Regular” unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as “Regular” with an octane rating below 87, particularly in high altit ...

CD/CD player care
Do: • Handle discs by their edges only. (Never touch the playing surface). • Inspect discs before playing. • Clean only with an approved CD cleaner. • Wipe discs from the center out. ...