Thread: 5W-40 oil

Originally Posted by Graeme

Stupidly low oil pressure might be OK when the engine and the oil are new.

Certainly a **** poor outcome and frustrating for owners.Many vehicles have been using 30W oils for decades with no issues.

And the newer LR models have this well documented oil dilution issue.

Just imagine if a garden variety brand had these numbers of engine issues,we would be hearing about it every day in the media.

On another note the LC300 runs a 20W oil.
Time will tell with it I suppose,but going on previous LC generation engines,they should be fine.

Edit,could the oil pump in yours be inefficient,but I suppose it is a huge expensive job to change.
Is there another vehicle you could check your pressures against,which may help?
They sometimes get inefficient in the 1-VD,but usually at huge mileage,well over the 400K.

With improved machining comes tighter tolerances and thus thinner oils. The world isn’t full of dinosaurs engines these days.

Originally Posted by DiscoJeffster

With improved machining comes tighter tolerances and thus thinner oils. The world isn’t full of dinosaurs engines these days.

With more than likely reduced longevity.

Originally Posted by scarry

With more than likely reduced longevity.

ASPW went on a rant about this recently. Didn't stop him buying a 2.8 though. But it must be more highly stressed than a 4.5 V8 doing the same work.

Hmmm.... Wonder how a 4.5 would go in the Oka??

Originally Posted by scarry

could the oil pump in yours be inefficient,but I suppose it is a huge expensive job to change.
Is there another vehicle you could check your pressures against,which may help?
They sometimes get inefficient in the 1-VD,but usually at huge mileage,well over the 400K.

Mine's hot idle and max pressure @ revs are on spec now, well above minimums, using oil appropriate for the ambient temperature here. Hence it appears that both the pump and the bearings are OK. I could change the pump myself but I can't see the point, which I may still do but not at the moment. A genuine pump is under $800 ex the nearest LR dealer plus a new crankshaft bolt so cost is acceptable.

I'm still dumb-founded that after a 20 deg night that initial idle pressure is 30 psi and 50 psi at around 1500 but only about 10 minutes driving before idle is back to 12 and 1500 is nudging 25. 100 kph is 1300 rpm in top gear and already in the max torque band so plenty of opportunity for bearing abuse.

Originally Posted by Tins

Hmmm.... Wonder how a 4.5 would go in the Oka??

6.6 Duramax has been done

Tony

Originally Posted by scarry

On another note the LC300 runs a 20W oil.

I know what your implying, but technically it runs a 0W - 0W-20. An SAE 20W is not the same viscosity as an SAE 20.

Originally Posted by DiscoJeffster

With improved machining comes tighter tolerances and thus thinner oils. The world isn’t full of dinosaurs engines these days.

The biggest factor in thinner oil usage is emissions not tolerances

Watch out, 0W-8 oil is becoming more popular

Does anyone know what hot oil pressures the LC300 runs?