Thread: Oil Question Again

As per Gotaflat, I’ve been on HPR 5w-40 for a few years. My engine is still running so I take that as success.

5W40 for me

5W30 is more for LR economy target needs and not long engine life

Penrite 5w40 here. Been using Enviro+ for 5 years, and moving to HPR5 at next change.

Originally Posted by veebs

To add to the confusion, have you considered 5W-40?

Wrong engine oil over 6 Years in our Land Rover - OMG - YouTube

Dont do it... They are off the mark on that one.

There has already been reports of vehicles running warmer with the thicker oil.

Their show is great, but sometimes I sigh as I watch a video just because its on Youtube doesnt necessarily mean its the right thing to do.

Another 5w-40 here, though not for any research or direction on my part - the trusted indy uses Penrite Enviro in this spec, and i figure for the amount of engines and kilometres he sees, it can't be causing THAt much harm?

I admit, I do like LRTime's methodic/scientific reasoning for 5w-40, though I haven't verified beyond 'ooh, lots of big words'

I've watched a few of his videos now, and no, I still haven't met a German with a sense of humour

Originally Posted by Tombie

Dont do it... They are off the mark on that one.

There has already been reports of vehicles running warmer with the thicker oil.

Their show is great, but sometimes I sigh as I watch a video just because its on Youtube doesnt necessarily mean its the right thing to do.

Bowing to any new temp evidence and without starting WWOil again my very simple logic says both 5W identical viscosity at cold or starting temps and the HPR Extra 10 (30+10) is only relevant at super high temps we might more commonly see in Australia with high ambient and towing the house scenarios. On top engines after 200,000km with some wear and potential oil pressure loss.

I did not change till after 200k km but that was because the Castrol 5W30 old school A5 ran out or became hard to find. This spec being outdated some time ago.

Also confusing was other users of the engine Citroen Jag etc. weren’t in the 5W30 camp.

The wildcard always for Disco concentrated failures has always been the increased vehicle weight. That is something we can only minimise to a point.

On balance I felt it was a safe(r) bet long term in an older engine for which not many would be under 150k kms today and on original tolerances.

Originally Posted by PerthDisco

the HPR Extra 10 (30+10) is only relevant at super high temps we might more commonly see in Australia with high ambient and towing the house scenarios.

The higher temperature typical characteristic Kinematic Viscosity is quoted at 100 deg C which is around normal engine operating temperature, not especially hot conditions and there's quite a difference between HPR 5 5-40's 14.4 and Magnatec Prof A5 5W30's 9.55.

Okay............., so for the less educated oil aware people, what is the preference for say a 3.0 SDV6 with approx 150,000km? Is it the previously used Penrite C1 5W-30 or should it be 5W-40 (assuming the 5W-40 is full synthetic and also strict 10,000km renewal frequency)?
Flame suit on, go for it.