What Oil Should I Use For Running In Motor?

[stuartlaw_78]

Hi all...

Just in the process of rebuilding my motor.

2 questions...

1..... Should I use 'running in' oil for the first 1000kms or so?

2..... What is a good grade of oil to use for the RB25DET motor?

Please don't give me a response if your just guessing.. I need a solid reply from someone who really knows the best oil for this motor.

Thanks...

[dezz]

you wont get guesses, you're going to get opinions. a shit load of different 1's. everyone has their preference.

if you want a solid answer, use the oil nissan specify. i think it might 7.5W/30

http://www.skylinesaustralia.com/forums/in...showtopic=22458

[stuartlaw_78]

Thanks..

ok.. point taken.. let me refrase my question... I'm after an answer from someone who has used and oil for this motor and has been happy with it.

My main concern is whether or not to bother using a running in oil or just go straight to the oil that I will use for every day use once it's run in??

Everyone has a difference in opinion so if anyone has been there and done that, let me know..

Thanks

[paulr33]

your engine builder / tuner should be giving you this information

[stuartlaw_78]

I'm sure they will but I'm just trying to get as much info and opinions as possible... Can't be any harm in that... :-)

[Sambo33]

yes, definately check with your engine builder first. i used 'valvoline run in' oil for mine. also make sure to find out what running in procedures your builder recommends too.

[wrxhoon]

I use running in oil, drop it out after about 100 km and change the oil filter . I refill with the same stuff for another 400-500 km then drop it out and change the filter again and use mineral oil for the next 2 oil changes about 6 k k's then use synthetic oil on the next change .

5w40 or 10w50 , but it will depend on what you use your car for .

[R33S2]

Wrxhoon is on to it, his is a good run in procedure but I would do a nulon treatment at 5000ks.

[StockyMcStock]

here is what i recommend:

castrol GTX straight up.

change it at 50km, with the filter.

change it again at 250km.

change it at 1000km

change it at 5000km, with the filter, to a synthetic oil of your choice (mobil 1 is good gear)

[RB30-POWER]

i say just get a proper non friction modified run in oil.

i seen brand name run in oils on the shelf at supercheap the other day.

[slo34]

i use motul 300 V comp oil for the lot it cost alot but i rather spend the dosh on it and a trust oil filter or K&N oilfilter to run it in i rather spend the extra to ensure my motor will be in tip top form,

[Sydneykid]

I have used the same basic running in process for lots of years and on many engines;

Castrol GTX (the basic no frills mineral oil) with new filter.

Run engine for about 1/2 hr or until well warm.

Change oil filter. Engines can have particles in them that acccumulate during the build/maching proces and they need to be removed from the engine ASAP, these are caught in the oil filter. If you leave them in, the oil filter can get blocked and so it will be bypassed ie; no filtering.

Check the basic tune on the dyno or on the road with portable lambda sensor.

Drive to Bathurst and back, around 500k's, lots of varying conditions, up and down hills, freeway, long climbs etc. Don't rev the beegeesus out of it, gentle but firm, change throttle openings often, no slogging it in high gears with lots of throttle and load it up with partial throttle openings going up hills.

Drain the GTX and remove the oil filter.

Refill with Castrol Formula R Synthetic 10W60 and fit a new oil filter.

Do leak down test, if OK then final tune on the dyno.

Go racing

Cheers

Edited December 14, 2005 by Sydneykid

[Guest Mashrock]

mineral oil for about 500km's

and again for about another 1000km

then redline oil. or an oil of your choice

and what was said above about running it in. the driving style

Edited December 16, 2005 by Mashrock