Should I flush my engine oil before switching from conventional to synthetic oil or vice versa?

No, it is not necessary to flush your engine when switching between motor oils. Typically, conducting a routine oil change and replacing the conventional oil with a synthetic motor oil will not require any additional maintenance.

Do I need a special oil filter for a synthetic oil?

No, synthetic motor oil does not require you use a special filter. Oil filters are used based on vehicle specifications. Refer to your vehicle Owner’s Manual for guidance on what type of oil filter to use.

Is there a way to tell if my engine oil needs to be changed or is running low?

Yes, if equipped, your vehicle’s oil life monitoring system will inform you when your motor oil needs to be changed. Refer to your vehicle Owner’s Manual for more specific guidelines.

Does my transmission fluid need to be changed as regularly as my oil?

No, typically, transmission fluid lasts much longer than most engine oils. Refer to your vehicle Owner’s Manual to identify how often and when your transmission fluid should be changed. Severe usage and regular usage descriptions are provided.

Is there a difference between power steering fluid and transmission fluid?

Yes, there is a difference. There are many types of transmission fluid. GM Genuine Parts and ACDelco recommend referring to your vehicle Owner’s Manual for fluid recommendations for all vehicle systems.

Acdelco Gm Original Equipment 10 4091 19300457 Rear Axle Lubricant

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

🛢️ Keep your ride smooth and unstoppable with GM-grade rear axle power!

MADE IN THE USA - Crafted domestically with rigorous quality standards for peace of mind
ENGINEERED FOR ENDURANCE - Backed by GM for trusted, long-lasting rear axle protection
HEAT RESISTANT RELIABILITY - 250°C flash point keeps lubricant stable even in high-heat environments
SUPERIOR CORROSION DEFENSE - Calcium Sulfonate formula prevents rust and wear under extreme conditions
OPTIMAL VISCOSITY PERFORMANCE - 75W-90 grade ensures smooth gear shifts and reduced friction

The ACDelco GM Original Equipment 10-4091 Rear Axle Lubricant is a 32 oz bottle of high-performance, calcium sulfonate-based oil designed to protect your vehicle’s rear axle. Featuring a SAE 75W-90 viscosity grade and a high flash point of 250°C, it ensures superior corrosion resistance and reliable operation under extreme conditions. Made in the USA and backed by GM, this lubricant is engineered for durability and optimal drivetrain performance.

Specifications

ASIN	B06Y5JNFJ9
Best Sellers Rank	#38,169 in Automotive ( See Top 100 in Automotive ) #30 in Automotive Assembly Lubricants
Brand	ACDelco
Brand Name	ACDelco
Container Type	Bottle
Customer Reviews	4.8 out of 5 stars 125 Reviews
Flash Point	250 °C
Global Trade Identification Number	30808709067871
Included Components	ACDelco - Rear Axle Lubri (A) (800522)
Item Form	Oil
Item Type Name	ACDelco Automotive Parts
Liquid Volume	32 fluid ounces
Manufacturer	ACDelco
Material	Calcium Sulfonate
Model Number	10-4091
Number of Items	1
Package Information	Bottle
Part Number	19300457
Recommended Uses For Product	Vehicle
SAE J300 Viscosity Grade	75W-90
Specific Uses For Product	Prevent Corrosion
UPC	808709067870
Unit Count	32 Ounce
Warranty Description	No Warranty

Reviews

F**.

Can't beat factory

Worked as intended.

13.05.2026

R**K

Seems genuine, good price

11.03.2026

F**A

Quality

Good quality

20.10.2025

A**N

As described

4.10.2025

G**Z

Great value

Perfect for my truck! Delivered fast!

29.06.2025

J**S

works so far, no issues.

worked so far in front and rear differential of 2021 Yukon Denali. I ordered 3 quarts for both, 1.14 qt for front and 1.59 for rear including the GM friction modifier for the rear. I didn't have much for limited slip groan noise in the winter, so no problems to solve just changing fluid at 124k miles.

2.08.2026

T**E

OE recommended

OE Ac Delco fluids, how can you go wrong? I recommend and use only AC Delco fluids in my GM vehicles.

5.04.2025

M**K

Great product

11.07.2025

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