Mobil 1 gear oil

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For those of you who are using Mobil 1 gear oil with a limited slip, do you still need the friction modifier? It says on the bottle that it is compatible with limited slips, but says nothing about the modifier. I know everybody has their own opinion on oil brands, but I am definately going with the Mobil brand. Thanks in advance.

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99'2500 SLT QC LB 4x4
white/agate, 5spd, trailer, camper, 3. 55LSD, 241HD, cab lights, 3500 tailgate lights, mopar mud flaps, luverne SS nerfs, diamond plate rails, Weatherguard box, Banks 4inch, 265 BFG KO's, ... more to come

 

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With an aftermarket Auburn gear limited slip, I found that the friction modifier was still a good idea even with Mobil 1. You could "feel" the grabbing when turning corners at low speeds, especially when backing. With a factory LS, your experience may be different.

 

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Traded... . , if it's like mine,you won't know until you put it in. I have amsoil 2000 75/90,which amsoil and almost everyone else says doesn't need modifier and I most definately had to use it. Dana 43161 (2 bottles). Craig

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97 3/4Ton, 2WD, 5SP, #11 Plate, 14 Housing, AF942M Air filter, Gutted Cat, 4"From Turbo, Shortened Frame, Custom Bed, HEY FORDBOY POWERSTROKE THIS!

 

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Traded,
Most OEM's suggest turning the vehicle in several tight figure 8's after installing any gear lube when changing fluids. You might try that before you spend the money for the additive. I have the Amsoil 2000 75W-90 in mine, and it was just fine without the additive. I did the figure 8 thing as well.

Wayne
amsoilman

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94'SLT 4X4 AT/White in color. Factory Tow Hooks & Running Boards. Amsoil By-Pass filter, Amsoil Air cleaner,and all fluids are Amsoil. Optima "Red Top" batteries.
BD exhaust Brake, BD Torque Lock, BD Torque Converter, Dr. Performance Stage II Injection Pump. Mag-Hytec Diff Cover,Mag-Hytec Transmission Pan, Isspro Pyro, Boost,Oil temp Gauges mounted in 3 Gauge post mount. One gauge monitors Engine Oil, Trans, Diff. Temps.

 

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I just wonder if all the gear and motor oils aren't the same. A friend of mine drives a fuel tanker and says that at the main gas&diesel depot in Seattle Mobil,Texaco,Chevron,Shell,ect. tankers are all lined up filling from the same tanks!He has even droped his load at up to three different brands of service stations. I'll bet that all the motor,gear,hydraulic,ATF and other types of oil come from the same tanks also. Thats just my opinion,I could be wrong. Of course amsoil is different-maybe.

 

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Traded, I just installed a Mag-Hytec conver last weekend and used Mobil 1. I didn't use any friction modifier and I haven't had Any chatter coming from the limited slip. If it starts, I'll add the modifier.

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98. 5 3500 QC 4x4
Driftwood/ Grey Int.
5 spd, 3. 54
PowerMax2, 19. 5" Alcoas, 245/70-19. 5 Michelins,
Ranchhand bumbers and toolbox, dual 3" with 5" tips, "Scotty Air System", Centerforce Dual Friction clutch, Autometer Gauges, Cobra CB, Sony CD player, Polk Audio Speakers, Upgraded fuel lines from tank to injector pump, Mag-Hytec Diff Cover, PacBrake.

69 Z-28 Camaro, Silver/Black, original motor, 58,000 miles

Building: 32 (Censored) 5 Window, "American Graffiti" replica