15w-40 in an RB20DET?

[r32GTSTI6]

My dad has like a shitload of spare 15w-40 laying around would it be ok to use in my rb20det? I live in melbourne so not that cold and i dont go to the track or push it too hard either

[Hadouken]

Yeh why not. Full or semi syn?

Will probably just be noisy on cold start

[r32GTSTI6]

Its castrol gtx modern engine, doesnt say if its synthetic or not

[r32GTSTI6]

btw what oil would you reccomend I use? I cant find anything about rb20det oils other than the service manual which says 7.5w-30 which is unfindable

[Hadouken]

If you track it you put a 50/60 weight in it.

I put 5w40 10w40 in almost everything I own. Unless it has 200k km on it then I'd put a w50 in it.

[Outcast]

i only use what should be used in it. but each to there own if it's only a daily then why not but if it mean's some thing to ye then i would't but i dnt know what oil goes in a 20 so could even be the right one lol

 

good luck any ways 

 

 

[KiwiRS4T]

I would use the free oil while its there. When it runs out you could try 5W 30 or if your engine is quite worn stick with the 15W 40.

[Ed.williams5]

The 15w40 should be fine as long as you live in a warmer climate and give it plenty of time to warm up before beating on the car...on first starts your lifters will probably be super loud.  I'm planning to move up to 10w40 from 10w30 next oil change but I also live in a place where it averages 115*(43c).

[Dose Pipe Sutututu]

Yes free oil, change every 3000km (because free and not full syn)