Customer Reviews

Royal Purple 01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil - 1 Quart

5 star:		(12)
4 star:		(2)
3 star:		(1)
2 star:		(0)
1 star:		(1)

 

 

Used this on my 2005 Infiniti G35 coupe. (6 speed manual, rear wheel drive, 300 hp). It was within recommended specs by the manufacturer. I changed my transmission fluid with 44,000miles on the vehicle. I had 0 issues prior to change. After changing to this product shifts between 1st and 2nd gear where hard. I drove it 100 miles, changed back to NEW OEM non-synthetic fluid and returned to shifting fluid/flawlessly. Perhaps the transmission of my vehicle is very sensitive, as I know many people swear by this product. I won't use again.

No major change in performance. I am waiting until i do an oil change to perform another milage check. I also put RP trand fluid in my Transmission. I cant see spending the $$$$ if there is no direct performance result. I will post back when I do my oil change.

Had the differential oil changed in my 2003 Ford Ranger. This is my long term ride that my wife uses and we don't use it much, but have taken care of it to the Max. Had this put in and you could tell the difference right away. Perhaps since this truck only has a 4 cylinder engine, any increase is felt. But I believe, that's have the battle, it's working as advertised.

I purchased this product to change the differential fluid in my 1970 International Scout. It contains the additive required for the limited slip differential, so that is a bonus.

Sure, there are cheaper oils you can buy for a differential. But from what I have been reading, this stuff is very good and will last much longer than regular "dinosaur" (non-synthetic oil) and will flow at lower temperatures.

I have only done one of the two diff's so far, the rear one, but there already seems to be a slight bit more "grunt" to my tired Scout (an engine rebuild is in the works). I also live in Minnesota, and found my manual transmission, transfer case, and both differentials very "gooey" when the temperature dips down to below freezing. I suspect that this will help somewhat.

On another note, I drained and replaced the fluid in my trans/transfer case with a Castrol "full-synthetic" 5w-50 motor oil, and wow what a difference there! Easier shifts, and much quieter than before. Many think you need to put in a heavy weight oil in these on a truck, but actually many use 50 weight motor oil or standard ATF in their manual transmissions now.

I use this as my gun oil in my Colt 6920 AR as well. Great stuff. Never had any issues with my rear end gears or rifle! Awesome company.

Great product. Transmission runs a whole lot smoother, and the power transfer to the wheels is greatly noticed. Recommend to anyone that wants to get a little more out of there trans. plus the dealer had the best price around, beats even local part stores.

The vehicle runs a lot smoother with this oil, it is obviously one of the best quality oils out there.

changed the lower end oil in my OMC Seadrive outboard and took her out on two long trips and had no issues at all.

This is perfect for the Porsche 911 G50 Transmission. It is highly recommended by everyone for the Porsche. Shifts were smooth and precise.

I've used this as well as the 75W140 Royal Purple in both of my vehicles diffs (Liberty, Aspen). They have worked well as a replacement for the OEM fluid, and have no complaints. This isn't a magical gear lube, so I don't pretend to see all of the claims that I've heard from this stuff. I haven't seen my MPG's go up, and it's not like I've put 500,000 miles on my diffs with this stuff in it.