Idemitsu PSF Universal Power Steering Fluid

Idemitsu PSF is a mineral-oil power steering fluid formulated for non-electronic hydraulic power steering on Honda, Acura, Toyota, Subaru, Nissan, Infiniti, Hyundai, Kia, Mazda, Mitsubishi, Scion, Isuzu, and Suzuki vehicles. According to Idemitsu, the company serves as a reported OEM fluid supplier to Honda, Toyota, and several other Asian brands, though no named spec approval was accessible in a published TDS at time of review and the relationship has not been verified from a Honda or Toyota primary source. The fluid carries a standard viscosity profile for mineral-oil PSF, with kinematic viscosity data available from the SDS. Community data is consistently positive: owners at high mileage report noise-free operation, clean fluid condition, and seal integrity. No stop-leak or seal conditioner additives are present.

Buy this for any Honda, Acura, Toyota, Lexus, Scion, Subaru, Nissan, Infiniti, Hyundai, Kia, Mazda, or Mitsubishi vehicle with a hydraulic (non-electric) power steering system. Skip if your vehicle has electric power steering (EPS): EPS systems use no hydraulic fluid. Also skip for European platforms requiring Pentosin CHF 11S or CHF 202; this is a mineral-oil fluid for Asian-brand systems and is not an approved substitute for those ester-based applications.

Signal word is WARNING, driven by an H317 skin sensitizer in the additive package. Gloves are warranted during any service work; brief top-off contact is lower risk but the sensitizer classification applies regardless. A Prop 65 warning applies, with Benzene listed at below 0.01% by weight in SDS Section 15. No aspiration hazard: viscosity at 40 degrees C is above the CLP exemption threshold and the SDS confirms aspiration toxicity as not classified at the mixture level. As a drain-destined fluid, old power steering fluid must be collected and taken to an automotive retailer or recycling center for proper disposal; it cannot go down a household drain or storm sewer.