Delvac 5W-40 in a 1HZ

Hi Jon

I use Penrite HPR diesel 15

HPR DIESEL 15
Bringing you the latest in light duty diesel oil technology, this semi-synthetic is suitable for most modern direct and indirect injection diesel engines including turbocharged. Ideal for new diesel vehicles under manufacturer’s warranty and normal driving conditions. Some vehicles may require Enviro+, HPR Diesel 5 or SIN 5.
SAE 15W-50, API CH-4/SL, ACEA A3/B4, M2C153F/G, Global DLD-1/3, VW 505.00

i changed to this after i Turbo it good stuff but im telling you your opened up a big can of worms on what oil to use
but what ever you use change it every 5000kms

Glenn...

From what I understand, provided that the oil specifiications meets the requirements of your motor, the lower weight of 5 moves around the engine much better when cold (as opposed to a 15 weight.....less wear at startup with the lower weight), and when its warm the weight is 40. A chemist for Castrol told me this.

Jon,
Theres a million people out there with 1Hz Toyotas and nobody with a 1Hz has answered your post. I expect that means (and I reckon its true) that no one would waste an expensive oil on an immensely reliable old motor. These thing don't wear out on standard oils, so no point in going to synthetics. If its anything like my daughters 1Hz, it goes black in no time after a change from all the soot. Would be a shame to see $100 worth of oil go dirty straight after a change. We use 15W40 diesel engine oils with out LandCruisers - have done for as long as I remember. Never worn one out.