Mineral Gear Oil

Castrol Optigear BM 320

High-viscosity mineral EP gear oil for large enclosed industrial gearboxes operating under heavy loads and slow speeds. ISO VG 320 with extreme pressure additives per DIN 51517-3 CLP specifications. Micropitting protection additives extend gear life in high-torque applications.

Compatible Data Quality: Verified

Technical Specifications

Viscosity 40C	320 cSt
Viscosity 100C	24.0 cSt
Viscosity Index	95
Pour Point	-15°C
Flash Point	235°C
Base Oil	Mineral
Thickener	N/A
Nlgi	N/A

Average Price: $15–$30/gal (based on Mineral Gear Oil market data, 2026)

Equivalent To

Equivalent ToMobilgear 600 XP 320 Equivalent ToShell Omala S2 G 320

Compatible With

Compatible WithCastrol Optigear BM 220

Related Products

Mobilgear 600 XP 150Mineral Gear Oil Mobilgear 600 XP 220Mineral Gear Oil Mobilgear 600 XP 320Mineral Gear Oil Shell Omala S2 G 150Mineral Gear Oil Shell Omala S2 G 320Mineral Gear Oil

Side-by-Side Comparisons

Comparevs Shell Omala S2 G 320 Comparevs Mobilgear 600 XP 320

Data Sources:

Castrol Optigear BM Product Data Sheet 2024
DIN 51517-3 CLP gear oil specification
AGMA 9005-D94 gear lubricant standard

Last updated: 2026-07-22. Always verify with original manufacturer datasheets.

Frequently Asked Questions

What is the equivalent of Castrol Optigear BM 320?

CrossRefHub lists 5 equivalents for Castrol Optigear BM 320 in the Mineral Gear Oil category. Browse verified cross-references above based on OEM technical datasheets.

What is the price of Castrol Optigear BM 320?

The average price of Castrol Optigear BM 320 is $15–$30/gal, based on Mineral Gear Oil market data for 2026.

Is Castrol Optigear BM 320 compatible with Mobilgear 600 XP 320?

Yes, Castrol Optigear BM 320 and Mobilgear 600 XP 320 are listed as equivalents. Both belong to the Mineral Gear Oil category with matching technical specifications. Always verify with OEM documentation before substitution.