Manuals Repairs Oil & Parts Roots Oil

Lubrication Tips

Proper lubrication is very important to maintain your warranty and to maximize the longevity of your blower. You want to make sure you don't under-fill, over-fill, or use the wrong oil and/or grease in your Roots blower.


    Roots gallon of oil
  • Read your operating manual for complete lubrication and maintenance instructions.
  • Use Roots Synthetic Oil. It is superior in performance to petroleum based products. It has high oxidation stability, excellent corrosion protection, extremely high film strength and a low coefficient of friction. Typical oil change intervals are increased 2-3 times over petroleum based lubricants. If you choose to use another brand of oil, use a good grade of industrial type non-detergent, rust inhibiting, anti-foaming oil of the correct viscosity.
  • Use Shell Darina EP NLGI Grade 2 Grease in URAI blowers, PN 5067628. For URAI-GAS blowers, use Roots NLGI Grade 2 premium grade aluminum complex grease with 300˚F (149˚C) service temperature, moisture resistance, and good mechanical stability, Roots PN T20019001.
  • The oil should be changed after the initial 100 hours of operation.
  • Oil viscosity is dependent on the expected ambient conditions surrounding the blower and driver. The required viscosity is as follows:

  • Ambient Temperature above 90°F (32°C) use ISO Viscosity No. 320
  • Ambient Temperature 32°F to 90°F (0°C to 32°C) use ISO Viscosity No. 220
  • Ambient Temperature 0°F to 32°F (-18°C to 0°C) use ISO Viscosity No. 150
  • Ambient Temperature below 0°F (-18°C) use ISO Viscosity No. 100

  • Roots recommended grease
  • DO NOT under-fill or over-fill the blower. Use the overflow plug or sight glass to properly fill the oil to the optimum level.
  • DO NOT use Mobil SHC synthetic oils in ROOTS blowers. It causes severe sludge build-up and seal leakage problems.
  • DO NOT use automotive type lubricants, as they are not formulated with the properties recommended for your blower.
  • DO NOT use Lithium based greases in URAI blowers. Also, do not mix the type of grease in the blower.