Oil Lines
What Are Engine Oil Lines?
Engine oil lines are the hoses, tubes, and hard lines responsible for routing pressurized oil throughout your engine and its ancillary systems. They connect critical components such as the oil cooler, turbocharger, and engine block, keeping lubrication flowing exactly where it needs to go. Without properly functioning oil lines, oil pressure drops, bearings run dry, and turbocharger bearings can fail rapidly — making these seemingly simple parts among the most consequential in your engine bay.
Why Oil Lines Matter for Engine Health
Modern engines operate under significant thermal and pressure stress. Oil lines must withstand high temperatures, resist degradation from petroleum-based fluids, and maintain a leak-free seal even after years of heat cycling. This is especially true for turbocharger oil feed and return lines, which are exposed to the extreme heat generated by the turbo's center section. A cracked or collapsed oil line can starve a turbocharger of lubrication within seconds, leading to catastrophic bearing failure. Even on naturally aspirated engines, deteriorated oil cooler hoses can cause transmission fluid loss or engine overheating. Replacing worn oil lines proactively is far less costly than the repairs that follow a failure.
What to Look for When Shopping Oil Lines
- Material: Look for hoses with nitrile or synthetic rubber inner liners, which resist oil absorption and maintain their shape under pressure. Stainless steel braided hoses offer additional durability for performance or high-heat applications.
- OE vs. Upgraded fit: OE-spec replacement lines are pre-formed to match factory routing, making installation straightforward. Upgraded lines in stainless or high-temp materials can extend service life beyond the original part.
- Complete kits: For turbo oil lines especially, look for kits that include all necessary gaskets, fittings, and seals — this saves time and ensures you have every component needed for a proper repair.
- Application coverage: Verify the line is designed specifically for your engine. Turbo feed and return lines in particular are highly application-specific in their routing and fitting geometry.
Top Brands in Engine Oil Lines
Gates is one of the most trusted names in engine hose technology. Their turbo oil feed and return lines are designed for OE-exact fit and developed to handle the extreme temperatures found in the turbocharger system. Gates also produces transmission oil cooler hoses engineered with synthetic rubber tubes and oil-resistant neoprene covers, reinforced with braided cord for continuous-pressure resistance.
Edelmann has built a strong reputation in the turbocharger oil line segment. Their kits provide coverage to a broad range of vehicles from heavy-duty diesel trucks to small compacts, and each application-specific part includes the necessary hardware for a complete solution. Lines are manufactured using high-temperature furnace brazing for tighter tolerances, and austenitic stainless steel construction resists corrosion over the long term.
Genuine parts are OEM-sourced components designed to match the exact specifications of the original equipment — an ideal choice for owners who want a factory-correct repair without any guesswork on fitment or performance standards.
Cohline is a specialist hose and line manufacturer with deep roots in European OEM supply, making their oil lines a popular choice for European vehicle applications where precise material specifications are critical.
Goodridge brings its motorsport pedigree to the oil line category. Founded in 1969 and now supplying fluid transfer assemblies to top-tier racing programs worldwide, Goodridge offers braided stainless steel oil lines featuring PTFE-lined inner hoses for excellent chemical and heat resistance — a popular upgrade for performance builds and enthusiast vehicles.