D4 SDV6 Engine Oil

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Originally Posted by rapserv

I note that the HPR 5 at least has the same A3/B4 rating as the Nulon but the API is different .. SP compared to SN/CF respectively.
Unless you're in the automotive game .. the whole thing is very confusing.

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API SP is the latest Petrol Engine Spec - SN is the previous generation spec and CF is a fairly old Diesel oil spec now - Current is CK-4 from memory. But with API specifications, anything starting with S = Spark ignition, C=Combustion ignition.
I would avoid using a pure API SP in a diesel engine as they have lower detergent levels to deal with soot particles(particularly calcium). This is to enable them to deal with low speed pre ignition better in direct injection petrol engine.

I currently have Castrol Edge A3/B4 5W40 in my 4.4 TDV8 and intended using Penrite HPR 5 5W40 next time. However maybe Penrite Diesel 5 5W40 would be better even though it's semi-synthetic, but possibly will need shorter changes than 10K kms. I have a digital pressure display so I can tell when the oil starts to thin.

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Originally Posted by rapserv

When you guys say HPR5 .. do you mean HPR5 or HPR Diesel 5?
Two different spec oils and one FULL synth the other Semi-Synth.

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HPR5.
I changed to that approx 60,000 klms ago (I'd have to check my oil results to confirm), now on 212,000k.
I get the oil analysed at every change and noticed a slight improvement in wear metals as a result, eg, Chromium dropped from 5ppm to 3ppm.
I change oil/filter every 7-8,000 klms and use Wynns Professional engine oil additive.

Today I changed from Edge A3/B4 5W40 to Penrite HPR5 5W40 in my 4.4 TDV8 L322. Hot idle pressure was 12 psi with Magnatec A5 5W30 after 10K kms and the same with new Magnatec A5 5W30 Stop-Start and again with Edge A3/B4 5W40 both when new and after 12K kms, but Penrite HPR5 5W40 hot idle is alternating between 14 and 15 psi. I'm not sure if the extra hot idle pressure is good although at 100 kph an extra couple of psi above the usual 14-15 would provide a better comfort factor. Edge kinematic viscosity at 100 deg C is 13.4 nominal and HPR5 14.4 nominal. I changed looking for better stay in grade when working hard so I suppose higher idle pressure shouldn't be unexpected. I'll keep an eye on cold pressures and how quickly it drops.

Now hot idle is 13 psi so I'm happy with that. Must not have been properly hot yesterday.

Quote:

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Originally Posted by rapserv

When you guys say HPR5 .. do you mean HPR5 or HPR Diesel 5?
Two different spec oils and one FULL synth the other Semi-Synth.

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HPR5 , NOT HPR Diesel 5.

I've been using it for roughly 50,000 klms having switched from the Penrite 5W30 full synthetic.
My oil analysis results have improved, eg, chromium, copper, iron etc all slightly lower ppm.

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Originally Posted by Discodicky

HPR5 , NOT HPR Diesel 5.

I've been using it for roughly 50,000 klms having switched from the Penrite 5W30 full synthetic.
My oil analysis results have improved, eg, chromium, copper, iron etc all slightly lower ppm.

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I’ve been on it for around 100k km [emoji1360]