Valvoline 75w-90 or Mobil1 75w-90 LS for a 6 speed?

[mntn-biker]

They both say they are GL-5 rated. The Mobil1 is the synthetic blend. Kinda leaning this way since I run the Mobil1 synthetic oil in all of my vehicles. Anyone care to share their input on the synthetic blends for the manual trannies?Thanks - Mike

[star_deceiver]

I'd use the mobil 1

[06pvibe]

Correct me if I'm wrong, but doesn't the LS stand for Limited Slip? If so then is has the hypoid additive for a wet clutch style limited slip differential which helps keep the clutches from chattering while in operation. You shouldn't need to use it in that transaxle.

[mntn-biker]

Quote, originally posted by 06pvibe »Correct me if I'm wrong, but doesn't the LS stand for Limited Slip? If so then is has the hypoid additive for a wet clutch style limited slip differential which helps keep the clutches from chattering while in operation. You shouldn't need to use it in that transaxle.But would it hurt to use it? I'm just a huge fan of synthetic lubricants. They are both GL-5 rated as the description on their website states. I e-mailed Mobil1 with the car/transaxle specifics and they said I should be good to use it for this application.

[06pvibe]

Quote, originally posted by mntn-biker »But would it hurt to use it? I'm just a huge fan of synthetic lubricants. They are both GL-5 rated as the description on their website states. I e-mailed Mobil1 with the car/transaxle specifics and they said I should be good to use it for this application.No. I have no reason to believe that it would. Just a little more expensive (for the additive) perhaps.Just don't try using reg 75w-90 in your limited slip.