What Engine Oil To Use For Rb25det?

[NateR31]

ive been using castrol synthetic GTX 10-60

but it seems no one else here likes it.

[jeffworld2]

so what weights are good for rb25det? lowest possible and then 40 weight? or is 30 or 50 better for an engine with around 80 000k

[Trex101]

so what weights are good for rb25det? lowest possible and then 40 weight? or is 30 or 50 better for an engine with around 80 000k

Try a 40wt first, if no oil consumption then try something lower like a synthetic 10w30

[aquariuz6]

I'm work as a aircraft mechanic as my day job and import/supply performance lub to local clubs as a sideline/hobbies.

Motul 8100 5w40 may not contain ester in it's oil formulation. You may want to choose 8100 0w40 if it's ester you are looking for .

Yes, Delvac 1 5w40 are fully synthetic using a blend of PAO/ester couple with a pretty strong additives pack and it's cheap too over in Aussie.

Another good read about polyolester.

polyolester - redline oil

Just curious Trex if you say they are cheap in Australia, would you know where abouts i can get my hands on one? retailer in sydney perhaps?

Will using delvac 1 be safe for changing oil every 5000kms everytime?