Royal Purple 01512 Synchromax Manual Transmission Fluid - 1 Quart Review
I've been experimenting with various transmission fluids in a 2001 BMW 325xi with approximately 130k miles on it. This fluid works better than Redline D4 ATF, but not as good as the original BMW lifetime fluid. With the original BMW fluid, I did not notice any rough shifts from 1st to 2nd. With the Redline D4 ATF rough shifting was more pronounced. With The Royal Purple Synchromax, it is just barely there. It should be noted that the rough shifts are more a product of my transmission being 10 years old, and not these fluids being inadequate. The reason the original BMW fluid worked best (I would guess) is because it had a higher coefficient of friction (from being old) which allowed the synchros to match gear speed quicker. These new fluids that I've tried are all just too slippery. I should say though, that it is only 1st to 2nd that is a little rough, all other shifts are flawless so I would say that this is an excellent fluid, especially for newer vehicles. If you've got a little rough shifting from old age, I'd look for something with a better coefficient of friction. The next thing I'm trying is Redline's 75W140NS which does NOT have friction modifiers in it (which makes it less slippery).
Royal Purple 01512 Synchromax Manual Transmission Fluid - 1 Quart Feature
- Manual transmission fluid
- Increases performance
- Improves shifting
- Reduces gear noises
- Lowers operating temperatures
Royal Purple 01512 Synchromax Manual Transmission Fluid - 1 Quart Overview
Synchromax is a manual transmission fluid that increases performance and the life of your equipment. It improves shifting, reduces gear noise and increases power transfer to the wheels. It also lowers operating temperatures and provides outstanding wear protection for longer transmission life.
