What viscosity is this particular oil?

Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90For heavily-loaded racing differentials and transmissions, problem gearboxesMany performance racing applications like Sprint/Midget/Dirt Late Model Differentials, Detroit Lockers and spools, NHRA Top Fuel and Funny Car rear endsNot recommended for most synchro applications due to the product's extreme slipperiness

What is the viscosity of this? Need a specific number.

Film thickness greater than an SAE 75W250, yet low fluid friction like 75W90. This is from the manufacturer's site.

Canged primary chain OIL of my 2002 RoadKing ScreamingEagle I made a MISTAKE! Added REDLINTransFluidw/Shockproof. IS It COMPATABLE

I would think not. As the primary runs a 20w 50 and the red line is something like 75 90 it's going to a lot thicker. I would call a local Indy not HD and ask them for sure.

It exceeds API GL-5 specifications.

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Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

Product ID: 5797128

Details

Brand
Red Line
Item Weight
1.7 pounds
Liquid Volume
32 fluid
Material
Synthetic
Package Information
Bottle

⛽Boosts differential efficiency for better mileage

🏁Trusted in top-tier racing & high-load applications

⚙️Polyol ester synthetic base for extreme lubrication

R1059

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Description

🏎️ Gear up with Red Line – where performance meets precision!

PROVEN TRACK RECORD - Favored by NHRA Top Fuel, Dirt Late Model, and other elite racing teams worldwide.
LEGACY OF EXCELLENCE - Since 1979, Red Line delivers uncompromising performance and protection.
RACE READY SYNTHETIC POWER - Polyol ester base ensures unmatched lubrication under extreme conditions.
HEAVY DUTY SHOCKPROOF PROTECTION - Designed to withstand high load and shock, perfect for racing and specialty gearboxes.
MAXIMIZED DIFFERENTIAL EFFICIENCY - Engineered to improve mileage and extend drain intervals, saving you time and money.

Red Line 58204 Heavy Shockproof Gear Oil is a fully synthetic, polyol ester-based lubricant engineered for extreme conditions. It enhances differential efficiency, extends drain intervals, and offers superior protection against wear. Trusted by professional racers and high-performance vehicles since 1979, this gear oil exceeds API GL-5 standards and is ideal for racing transmissions, high-load differentials, and specialty applications.

Specifications

ASIN	B000CPI5XW
Best Sellers Rank	#15,327 in Automotive ( See Top 100 in Automotive ) #32 in Engine & Oil Fluid Additives
Brand Name	Red Line
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (1,005)
Global Trade Identification Number	00083522582049
Included Components	Red Line 58204 Heavy ShockProof Gear Oil - 1 Quart Bottle
Item Form	Oil
Item Type Name	Engine & Oil
Item Weight	1.7 pounds
Liquid Volume	32 fluid ounces
Manufacturer	Red Line
Material	Synthetic
Model Number	58204
Number of Items	1
Part Interchange Info	58204
Part Number	57-6525
Recommended Uses For Product	Gear Oil
Specific Uses For Product	Racing transmissions and transaxles, high load conditions, high-performance differentials
UPC	083522582049 083522582094
Unit Count	32 Fluid Ounces
Warranty Description	Limited Manufacturer

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R1059

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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