I know some of you are using the motul GEAR300 75W 90 oil, but the manual specifies the use of an API GL-4 oil, and the GEAR300 is an API GL-5. And i can't remember where it was that i read it, but it is very imprtant to stick to the API GL-4 because the synchros are very sensitive. Has anyone got any long term experince with the GEAR300.

I know the Motylgear 75W 90 is both GL-4 and GL-5 compliant. Anyone used this in there gearbox and diff?

 

Sorry, turns out it is GL 4 and 5 certified. Just a typo on their website.

 

I went with Amsoil 75w90 in my diff. It meets the factory recommendations. GL-5 exceeds it as well so the dealer shouldn't have a issue with that.

 

Check these threads out if you haven't already, very informative:

https://my350z.com/forum/engine-and-drivetrain/216785-if-anyone-hasn-t-changed-the-differential-fluid-yet.html

https://my350z.com/forum/engine-and-drivetrain/321093-base-model-owners-without-vlsd-have-you-changed-your-differential-fluid.html

 

We use nothing but Motul oils. In our eyes, it is simply the best brand of oil. Motul is all we sell, and all we put in our customers' cars, so you know it's good

 

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I switched to Motylgear oil at the start of last summer. It showed improvement in both.
Smoother shifts were def noticeable.

 

Actually thier motor oil does not fair very well at all in daily driven cars, check the oil threads and Bobistheoilguy.com' for the breakdown on 300V and the 8100 series. They show extensive wear in every daily driven cars.
Makes sense if you think about it, these are race oils designed for race cars,
they have very low to no detergents in them and are formulated for endurance racing and extended high rpm use, even formula one cars no longer use Motul. There are many other better choices for the VQ35 in a daily driven street car. Mobile 1 0W-40 and Amsoil 2000 series are just two of the oils recommended for our cars.

 

Well, first off this thread was regarding gear oil, not motor oil, but I have heard the same thing, at least in regards to the 300v.

But the 8100 and the 300v are a lot different from each other. The 300v is a race oil, but the 8100 is NOT a race oil designed for race cars, its meant for street cars. Have you ever read the back of the 8100 label? "Up to 10% increase in fuel economy during start up and short journeys around town." I'm pretty sure race cars are not meant for "short journeys around town" but rather dd cars are.

I dunno, I use motul 8100, maybe there are better choices, but I'm pretty sure its better than dealership conventional oil.

 

You obviously havnt seen the oil results from Backstone labs on these products and seem to be one of those "because I use it, it must be good type of people" so I will not be drawn into a debate with you, I dont care if you put water in your crankcase its your car, do what you want, and I know what this thread pertained to, I can read and comprehend, I was responding to the quote from forged Performance stating they think its the best brand of oil when clearly its not, this is not my opinion, its very well documented.

 

I understand why you posted, I'm not saying motul makes the best engine oil. My point was that 8100 is not a race oil meant for race cars (which you stated it was), only the 300v is.

I believe their gear oil and brake fluid are pretty darn good though, although I use Sylkolene for my dif.

 

I agree, I run the Gear300V in my differential. I was just trying to post a heads up to the OP because he had questions about Motul and after I saw the reply from forged I didnt want him to be misimformed about thier engine oil. Thats all.

 

Thanks guys. I know alot of you guys are worried about the results from blackstone because they show increased wear in parts. But just remember your comparing very good oils with very good oils. These engine were designed by nissan to last 200000 miles on the crap mineral stuff they stick in there, so no matter what high grade oil you use it's going to be an improvement. Comparing Mobil 1 with Motul for instance is like me saying i shagged Pamela Anderson, and then the next guy comes and tops it by saying he shagged Carmen Electra!
My point is, good oils are good oils, and most of you are comparing pennies worth of differences.

 

how much motul gear 300 do I need for a differential fluid change?

 

About 1.4 litres.

 

I am running motul brake fluid and rear diff oil at the moment, and I was given advice by my brothers shop (driftmotion.com) that Motul shouldnt be used over about a year because it is made for race applications that change there oil all the time. He said it gets gummy and sticky and cloggs up other parts sometimes, from the supras theyve dealt with that have run it over a year .

I have it but plan and testing some new stuff next year.

 

In any cold weather applications the 300v will feel very thick in your tranny and shifting will be difficult until your car warms up. I like it when the car is running hard and up to operating temperature as shifting is very crisp and clean, but during cold start its not the best. I will continue to use the 300v as I will be tracking this summer and want race fluid.