Oil Guides & Tips

Practical guides on engine oils, hydraulic fluids, transmission oils, and how to find the right equivalent for your vehicle or equipment.

Transmission

Caterpillar TO-4 Oil Specification: Complete Guide to Approved Fluids

Everything you need to know about Caterpillar TO-4 specification — SAE grades, approved brands, equipment compatibility, and how TO-4 differs from UTTO and J20C fluids.

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Hydraulic

ISO VG 46 Hydraulic Oil Equivalent: Brand Cross-Reference Guide

Complete cross-reference guide for ISO VG 46 hydraulic oils. Compare HM, HV, and ashless formulations across Shell, Mobil, Castrol, Sinopec, and 5 other brands.

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Transmission

Allison TES 295 vs TES 668: Which Transmission Fluid Do You Need?

Understand the differences between Allison TES 295 and TES 668 specifications, see approved brand equivalents, and learn which fluid your Allison transmission requires.

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Engine Oil

API CK-4 Diesel Engine Oil: Complete Guide to Heavy-Duty Engine Protection

Comprehensive guide to API CK-4 diesel engine oils — how CK-4 compares to CI-4, 15W-40 vs 10W-40 differences, and brand equivalents from Shell, Mobil, Castrol, and more.

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Guide

Oil Cross Reference Tool: Find the Right Lubricant Equivalent Instantly

With hundreds of lubricant brands on the market, finding the correct alternative can be difficult. Learn how a professional oil equivalency matching system works and why it's essential for automotive, industrial, and fleet operations.

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Hydraulic

How to Find a Hydraulic Oil Equivalent (Complete Guide)

Not all ISO 46 or ISO 68 oils perform the same — even if they share the same viscosity grade. This guide walks you through matching viscosity, performance standards, and OEM approvals step by step.

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Engine Oil

Engine Oil Cross Reference: How to Match the Right Alternative

SAE 5W-30 from one manufacturer may not meet the same API or ACEA standards as another. Learn the key factors in engine oil matching — viscosity, API classification, ACEA standards, and manufacturer approvals.

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Industrial

Industrial Lubricant Cross Reference Guide for 2026

Industrial lubricants vary widely in base oil chemistry, load-carrying capability, and additive packages. Find out how to cross-reference oils for gearboxes, compressors, turbines, and hydraulic systems.

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