phuaky

It's 15W-40. They've also just released a 5W-30 synthetic version recently in the US. As for the recent formula change, this is the first I've heard of it.

I'll give it a shot. Should work alright up in Queensland, especially in summer. I'll let you know how it goes.

I'm coming up to my first oil change since buying my Skyline (1994 R33 GTST). What's the opinion on Caltex Delo 400? It's a mineral based fleet oil. I've used it on diesels, turbo-diesels, carby and fuel injected NA engines and even in my bike. So far Delo has been the bees knees for me; and at $75 for a 20L drum it is well budget. Is it a good idea to use Delo in a RB25DET? Mileage: nfi (still running smooth, plenty of compression) Boost: 7 psi Drain interval: 5000 km I drive it as a daily