GL-4
Manual Gearboxes
Shortlist a GL-4 gear oil supplier product for synchronised manual gearboxes, transaxles and moderate-load gear sets only where the manufacturer calls for API GL-4.
GEAR OIL FOR IMPORTERS & DISTRIBUTORS
Build the Range Around Gearbox and Axle Requirements
FLYSAK supports automotive-parts importers, lubricant distributors and private-label buyers comparing an automotive gear oil supplier. The current catalogue separates API GL-4 products for specified manual gearbox and transaxle applications from API GL-5 products for specified hypoid axle, differential and final-drive applications.
A wholesale gear lubricant range should start with the vehicle and driveline mix, manufacturer-required API service category and SAE viscosity. GL-4 and GL-5 should not be treated as automatic substitutes. Use the manual transmission oil supplier guide to structure the selection brief.
APPLICATION MAP
Keep GL-4, GL-5 and Viscosity Decisions Connected
Confirm the equipment manufacturer's service category and viscosity requirement before approving a product or private-label claim.
GL-5
Axles and Differentials
Shortlist GL-5 products for hypoid axles, differentials and final drives where the equipment manufacturer requires API GL-5.
SAE
Viscosity Grade
Compare 80W-90, 85W-90 and 85W-140 against the stated equipment requirement, operating temperatures and duty profile.
OEM
Special Applications
For limited-slip differentials or other special driveline systems, send the exact manufacturer requirement and confirm product suitability before purchase.
GEAR OIL SUPPLIER SHORTLIST
Four Checks Before Requesting a Quotation
A useful supplier proposal connects the application map, product evidence, finished packaging and batch documents.
01
Driveline Brief
List the destination market, important vehicle groups, gearbox and axle applications, duty profile and distributor or workshop channel.
02
Application Evidence
Match each SKU to the manufacturer-required API category and SAE grade. Treat catalogue applications as shortlist guidance, not blanket approvals.
03
Pack Plan
Use the pictured packaging and stated pack sizes to build the retail and bulk mix, then confirm every private-label component in the project brief.
04
Current Documents
Review the TDS, SDS, agreed product specification and batch COA before final purchasing approval.
Browse Products Categories
AUTOMOTIVE GEAR OIL CATALOGUE
Compare Four GL-4 and GL-5 Gear Oils
Showing 4 Products
GL-4 80W-90
API GL-4VEHICLE GEAR OILManual gearboxes · transaxles · steering gears
Pack sizes4L · 18L · 20L · 200L · 208L
View Details 
GL-4 85W-90
API GL-4VEHICLE GEAR OILManual gearboxes · transaxles · steering gears
Pack sizes4L · 18L · 20L · 200L · 208L
View Details GL-5 85W-90
API GL-5VEHICLE GEAR OILHypoid axles · differentials · final drives
Pack sizes1L · 4L · 18L · 20L · 200L · 208L
View Details 
GL-5 85W-140
API GL-5VEHICLE GEAR OILHypoid axles · differentials · final drives
Pack sizes4L · 18L · 20L · 200L · 208L
View Details 
PRIVATE LABEL GEAR OIL
Approve Application, Packaging and Documents as One Brief
For a private label gear oil programme, connect every proposed SKU to its intended gearbox or axle application, API category, SAE grade, pack specification, label language and document set.
Compare the GL-4 80W-90 product and GL-5 85W-90 product, then review the private label lubricant programme. Final specifications, claims and commercial terms follow the confirmed product and written quotation.
Application mapRetail & bulk packsTDS & SDSBatch COA
Request a Gear Oil Product ProposalGEAR OIL BUYER FAQ
Questions Importers Ask an Automotive Gear Oil Supplier
What should an importer send to an automotive gear oil supplier?
Share the destination market, vehicle and driveline mix, gearbox or axle application, manufacturer-required API service category and SAE viscosity, preferred pack sizes, expected order mix and document requirements. This allows the supplier to map products to the purchasing brief instead of quoting a generic range.
Are API GL-4 and GL-5 gear oils interchangeable?
Not automatically. Use the API service category specified by the vehicle, gearbox or axle manufacturer. GL-4 and GL-5 products serve different application and load profiles, so a buyer should not substitute one for the other without documented equipment-manufacturer guidance.
How should buyers choose between 80W-90, 85W-90 and 85W-140?
Start with the SAE viscosity grade required by the equipment manufacturer, then review the operating temperature and duty profile in the destination market. Viscosity alone does not determine whether a product is suitable; the application and API service category must also match.
Which documents should buyers request before approving gear oil?
Request the current Technical Data Sheet and Safety Data Sheet, then confirm the agreed product specification and batch Certificate of Analysis. Product and label claims should match the current documents used for the approved order.
Can FLYSAK supply private label gear oil?
FLYSAK supports private-label and OEM gear-oil programmes. The selected products, bottle or bulk pack, cap, label, carton, artwork claims and document set are confirmed against the buyer's market and order brief before production.
PRIVATE LABEL OEM / ODM
Need a market-matched product range?
Tell us your country, target segment and container plan.