# COM-320 Air Compressor Oil ISO 320, 55 Gal

Date: 2026-10-31

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Compressor oils · 2026-10-31

[Buy direct from Lubri-Loy - free shipping: COM-320](https://lubriloy.com/products/com-320)

Lubri-Loy COM-320 is a mineral-based reciprocating compressor oil with ISO 320 viscosity, a 4,000-hour service rating stated in the catalog, and a 55 gallon drum size. It is a factory-order item. Lubri-Loy's commitment to quality continues with lubricants blended in the USA since 1949. Use the matching product page to buy directly from Lubri-Loy.

[View Air Compressor Oil ISO 320, 55 Gal Drum (COM-320) / COM-320](https://lubriloy.com/products/com-320)

## Product specification summary

- **Product:** Air Compressor Oil

- **Catalog No. / MFR #:** COM-320

- **Catalog description:** Reciprocating compressor oil, mineral, 4,000 hour

- **Viscosity grade:** ISO 320

- **Size:** 55 gal drum

- **Listing item number:** 03496076

- **Availability:** Factory order

## Mineral oil for reciprocating compressors

COM-320 is intended as a lubricant for reciprocating air compressors. Its mineral base and ISO 320 viscosity grade identify the oil described in this catalog listing.

Select compressor oil against the equipment manufacturer's lubricant requirements. The compressor type and required viscosity should match your application; the product name alone does not establish suitability for every compressor.

## The catalog's 4,000-hour service rating

The catalog describes COM-320 as Reciprocating Compressor Oil, Mineral, 4,000 Hour. That is the stated service rating for this product.

Use your equipment documentation and maintenance guidance when planning oil changes. Do not treat the catalog rating as a universal oil-change interval for every machine or operating condition.

## Quality lubricants blended in the USA since 1949

Lubri-Loy has been blending quality lubricants in the USA since 1949. That history reflects a continuing commitment to the quality of Lubri-Loy products.

For maintenance and purchasing teams, keeping the full catalog number, viscosity grade and drum size together helps identify the intended oil clearly.

## Order the 55 gallon drum directly from Lubri-Loy

COM-320 is supplied in a 55 gallon drum and listed as a factory-order item. Plan ahead and contact Lubri-Loy to confirm current ordering arrangements and timing rather than assuming immediate shipment.

Use the direct-order links to open the COM-320 product page on lubriloy.com. Reference COM-320, ISO 320 and the 55 gallon drum when preparing an order or discussing your requirements.

[View Air Compressor Oil ISO 320, 55 Gal Drum (COM-320) / COM-320](https://lubriloy.com/products/com-320)

## Frequently asked questions

### What is COM-320?

COM-320 is Lubri-Loy Air Compressor Oil, a mineral-based reciprocating compressor oil with ISO 320 viscosity and a catalog-stated 4,000-hour service rating, supplied in a 55 gallon drum.

### Is COM-320 a factory-order item?

Yes. COM-320 is listed as factory order. Contact Lubri-Loy ahead of your planned requirement to confirm ordering arrangements and timing.

Based only on the supplied COM-320 facts: Air Compressor Oil; mineral reciprocating compressor oil; ISO 320; catalog-stated 4,000-hour service rating; 55 gal drum; factory-order availability; item 03496076; and Lubri-Loy quality lubricants blended in the USA since 1949.

[Matching product page](https://lubriloy.com/products/com-320) · [All product guides](https://lubriloy.com/blog/product-guides)

[Buy direct from Lubri-Loy - free shipping: COM-320](https://lubriloy.com/products/com-320)

Other ways to buy: [Also available on Motion](https://www.motion.com/products/sku/03496076)