SHOPPING CART
0 Items ($0.00)
Here are your added items:
There are no items in your cart.
Edit Your Cart Proceed to Checkout

Truck Accessories From RealTruck.com
Free Shipping on everything!
 
Need Help? Call Us! 877-216-5446



Features

  • Greater Wear Protection
    Synerlec® additive technology forms a tough, tenacious film on all metal surfaces virtually eliminating engine wear.
  • Severe Service Performance
    Max-Gear® exceeds Eaton's stringent GL-5 / MIL-L-2105D Gear Oil Specs. Max-Gear® also is safe for GL-4 applications or bronze synchro gears.
  • Lower Coefficient of Friction
    Max-Gear® saves energy, reduces temperatures and maximizes power throughput. (OEM or aftermarket limited slip additives are not required.)
  • High Temperature Performance
    Max-Gear® eliminates harmful deposits and extends oil drain intervals.
  • Low Temperature Fluidity
    Max-Gear® meets operating requirements for vehicles operating in cold climates.
  • Shock Load Protection
    Max-Gear® reduces fatigue failures in bearings and gears.
  • Prevents Corrosion
    Max-Gear® protects both ferrous and nonferrous metals during operation and shutdown.
  • Excellent Water Separation
    Max-Gear® completely separates from water, preventing an oil-water emulsion.
  • Compatible with Other Oils
    Max-Gear® is compatible with other mineral gear oils and other synthetic hydrocarbon gear oils.
  • Meets Warranty Requirements
    Max-Gear® exceeds OEM warranty requirements for GL-5 automotive rear axle hypoid gear lubrication.
  • Environmentally Responsible
    Max-Gear® components are TSCA listed and meet EPA, RCRA and OSHA requirements. Max-Gear® extends oil drain intervals, eliminates premature oil changes, decreases the amount of oil purchased and disposed of and conserves energy.

Description

Royal Purple Max-Gear® is recommended for use in truck, RV / Motorhome, and automotive front and rear differentials, manual transmissions and lower gear units of marine engines that specify the use of an API GL-5 or GL-4 fluid.  Max Gear® is an ultra-tough, high performance, GL-5 automotive gear oil designed to provide maximum protection to heavily loaded gears while maximizing power through the drive train.  It outperforms other GL-5 gear oils because it combines the highest quality synthetic oils with Royal Purples proprietary Synslide® additive technology.  Max-Gear® makes gears run smoother, quieter, cooler, and longer without overhauls.  Synslide® additive technology makes the difference.  Synslide® additive technology is noncorrosive to gears and bearings, including case-hardened gears that are easily pitted by conventional sulfur-phosphorus EP oils.  Synslide® technology displaces water from metal surfaces and excels in protecting equiptment in wet environments.  It also fortifies the oil against the detrimental effects of heat, which causes oil to oxidize.  Synslide additive technology is truely Beyond Synthetic.  All viscosities of Max-Gear are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary.

Frequently Asked Questions

Why Use Royal Purple? See Below

My vehicle has a locking differential. Do I need to add additional friction modifiers when using your Max-Gear?
No. All viscosities of Max-Gear® are formulated with hypoid friction modifiers necessary for use in clutch or cone type differentials. No additional additives are necessary.

My vehicle's transmission specifies an API GL-4 gear oil. Can I use Max-Gear®?
Yes. Max-Gear® possesses both API GL-5 and GL-4 certification. Max-Gear® is formulated with Royal Purple's proprietary, Synslide® additive technology to provide the exceptional film strength necessary for GL-5 applications, yet it is noncorrosive to soft metals found in manual transmissions that specify a GL-4 rated lubricant.

Royal Purple Max Gear Synthetic Gear Oil 12300

  • Royal Purple Oil
  • Royal Purple Max Gear Synthetic Gear Oil
  • MaxGear 75w90
  • MaxGear 75w140
  • MaxGear 85w140
Royal Purple Max Gear Synthetic Gear Oil
  5 of 5  (5 reviews)
We're sorry, this product is
temporarily unavailable.

Please browse our other products available
under Oil Filters
Part #:12300
UPC:641330123009
Gear Oil Grade:75W90
PDF Icon Why Use Royal Purple?

Specifications

Typical Properties*
SAE GRADE 75W90   75W140   80W90   85W140   SAE90
Viscosity
    cSt @ 40°C 144.5 245 150.3 320 189.1
    cSt @ 100°C 21 33.6 16.8 28 18.2
    SSU @ 100°F 739 1255 782 1686 993
    SSU @ 210°F 105 163 87 138 93
    CP @ -12°C  — 10,110  —  —
    CP @ -40°C 59,911 97,555  —
Flash °F 430 430 430 430 430
Pour Point °F -40 -40 -40 -40 -40
Corrosion Test
    Copper Pass Pass Pass Pass Pass
    Bronze Pass Pass Pass Pass Pass
Rust Test
    Fresh Water Pass Pass Pass Pass Pass
    Salt Water Pass Pass Pass Pass Pass
Foam Test Pass Pass Pass Pass Pass
Timken OK Load, Lbs. 100+ 100+ 100+ 100+ 100+
Four Ball EP Test
    Weld Load, kgf 400 400 400 400 400
*ALL PROPERTIES ARE TYPICAL AND MAY VARY
PDF IconRoyal Purple Test Results
PDF IconMax Gear MSDS Sheet
PDF Icon Testimonials

Installation

Simply drain existing fluid and replace with Royal Purple Max Gear.  No need for any special treatment before adding.  Royal Purple Max Gear is completely compatible with other oils.  For additional information please call 1-877-216-5446 or 701-253-5906.  You can also email us at cs@realtruck.com.

Product Reviews Summary for Royal Purple Max Gear Synthetic Gear Oil

Average Rating of 5/5 stars, Reviewed by 5 customers.
Order by:

Displaying Reviews 1-5 of 5



Kelly H.
Carrington, ND
03/04/2011
5/5 for RP-12300 - Royal Purple Max Gear Synthetic Gear Oil

 


Scott B.
Jamestown, ND
05/13/2010
5/5 for RP-12300 - Royal Purple Max Gear Synthetic Gear Oil

 


Scott B.
Jamestown, ND
03/19/2010
5/5 for RP-12300 - Royal Purple Max Gear Synthetic Gear Oil

 


Scott B.
Jamestown, ND
06/30/2008
Works great
5/5 for RP-12300 - Royal Purple Max Gear Synthetic Gear Oil

 


William W.
New York, NY
12/18/2007
I am very pleased with how my gears are performing now with RP
5/5 for RP-12300 - Royal Purple Max Gear Synthetic Gear Oil

 
Displaying Reviews 1-5 of 5


12300 Royal Purple Max Gear Synthetic Gear Oil has an average rating of 5 with 5 reviews.


 
 
 

Principle #5: Be Fun and Productive
McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Sign Up For Exclusive Deals
Customer Service & Phone Sales
Toll Free 1-877-216-5446
Monday - Friday 7 AM - 8 PM CST
Saturday and Sunday 8 AM - 8 PM CST

Affiliate Program    About Us    Contact Us    Careers    Site Map    Privacy Policy    Meet Us

©Copyright 2012 RealTruck.Com®. All rights reserved.  Please notify our Customer Service of site related problems.
^ Back To Top