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.

Red Line 58204 Heavy Shockproof Gear Oil 1 Quart

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7624 som

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Description

⚡ Shift into the fast lane with Red Line’s shockproof gear oil!

PROVEN LONGEVITY - Keeps transmissions quiet and smooth beyond 70,000 miles—experience durability that lasts.
RACE READY RELIABILITY - Trusted by top-tier racing teams for Sprint, Midget, and NHRA applications.
EXTREME LUBRICATION POWER - Fully synthetic polyol ester base ensures unmatched protection under the harshest conditions.
SMOOTH SHIFTING EXPERIENCE - Optimized for seamless gear transitions, perfect for high-performance motorcycles.
MAXIMIZED DIFFERENTIAL EFFICIENCY - Engineered to boost mileage and reduce wear, surpassing API GL-5 standards.

Red Line 58204 Heavy Shockproof Gear Oil is a fully synthetic, polyol ester-based lubricant designed for extreme conditions. It enhances differential efficiency, extends drain intervals, and reduces wear, exceeding API GL-5 specifications. Popular among professional racers and high-performance motorcycle enthusiasts, it delivers smooth shifting and long-lasting protection.

Specifications

ASIN	B000CPI5XW
Best Sellers Rank	#19,800 in Automotive ( See Top 100 in Automotive ) #42 in Engine & Oil Fluid Additives
Brand	Red Line
Brand Name	Red Line
Container Type	Bottle
Customer Reviews	4.8 out of 5 stars 999 Reviews
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
Package Information	Bottle
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	32.0 Fluid Ounces
Warranty Description	Limited Manufacturer

Reviews

D**O

3.01.2026

J**P

3.03.2026

T**Y

1.11.2016

K**U

1.04.2026

A**R

18.11.2025

J**N

9.05.2025

G**T

19.05.2025

Z**C

3.04.2026

N**C

6.06.2021

3**0

7.03.2020

P**L

28.10.2023

S**Y

7.09.2017

K**N

23.08.2025

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7624 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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Red Line 58204 Heavy Shockproof Gear Oil - 1 Quart

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Description

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