Which Oil To Use On Freshly Built Rb26dett?

[brembogtr]

i have just rebuilt my rb26dett with forged internals

i need to know which oil is the best for my new engine?

also which oil i should use for the front and rear diff's aswell as gearbox oil?

thankyou

[GTRsean]

Just done one as well.

Run a mineral oil to bed in the rings and fresh surfaces.

Most of the bedding in will happen in the first 15-20 mins from what the other guys have been saying.

I have let the wastegates flap freely so I can load up the rings when I drive it.

As soon as I'm done I will dump the oil and fill up with mineral oil and filter again and do a few hundred k's on it then change oil again.

Probably run synthetic after a thousand k's or so.

I run castrol synthetic oil that has friction modifier for the rear LSD diff, castrol diff (original grade) oil in the front diff.

75-90 for the gearbox, or something like that, and Castrol Transmax Z in the transfercase.

Cheers

Edited September 19, 2008 by GTRsean

[brembogtr]

would mobil 1 5W 50 be good to use?

[GTRsean]

Can't see why not. I'm using a 10w40 mineral. I'm changing it every 500k at the moment (done 1500k). You can get specific run in oils.

I was told by a couple of experienced mechanics and tuners and they said the same thing:

Run mineral for 10,000k

Then run semi synthetic for another 10,000,

Then use full synthetic.

Seems like a fair few k's but I'll stick with that.