What engine oil do you use in your 08 Turbo Diesel Prado?

[tassie tiger Advanced Member Find all posts View Profile Close tassie tiger]

Re: What engine oil do you use in your 08 Turbo Diesel Prado?

I like running thinner oils, why should the engine waste hp pushing thicker and heavier oil around? Lighter oil builds oil pressure quicker and being w 40 oil also means it handles high temps better than w-30.

Unfortunately, low viscosity oils can loose film strength and can shear at high temperatures.

[MickL Addicted PP Member Find all posts View Profile Close MickL]

Re: What engine oil do you use in your 08 Turbo Diesel Prado?

in the handbook for the 150 diesel it mentions that 5w-30 is preferred.
In the old Jackaroo I ran Penrite HPR 5w-40 oil, certainly revved easier, used a tad less fuel and felt more responsive

The 5w-30 is the thinner of the two at operating temperature so nothing to do with the differences you noted.

I like running thinner oils, why should the engine waste hp pushing thicker and heavier oil around? Lighter oil builds oil pressure quicker and being w 40 oil also means it handles high temps better than w-30.

40w has a higher viscosity (Is thicker) at operating temperature than the 30w. Both grades you mention would build oil pressure at the same rate as they both share the same cold viscosity (5w-xx)

When reading multi-grade oils the first number is the viscosity when cold (0 degrees) the second is the viscosity hot (100 degrees, which is considered operating temperature)

Mick

[maxjj Senior Member Find all posts View Profile Close maxjj]

Re: What engine oil do you use in your 08 Turbo Diesel Prado?

you are correct I should have clarified, got myself confused, the Jackaroo was originally filled with 15w 30 or 40 Castrol RX super. Didnt start well and didn`t rev as freely, very noticable when cold. The 5 w 40 penrite made a big difference to it. The thicker obviously 40 didn`t matter once it was warm.

Anyway the way I am thinking is that a synthetic 5-w 30 oil will do the job nicely or a semi or mineral based 15 w 40 in the 1KD-FTV. I would go synthetic if going the thinner oil.

I don`t think shear strength is an issue with the quality oils around, especially if you go synthetic or semi synthetic .

[maxjj Senior Member Find all posts View Profile Close maxjj]

Re: What engine oil do you use in your 08 Turbo Diesel Prado?

this is an interesting read as it lists all the different oil ratings.

http://wiki.seloc.org/a/Oil_Labelling_Explained

[IMm29 Junior Member Find all posts View Profile Close IMm29]

Re: What engine oil do you use in your 08 Turbo Diesel Prado?

This is not meant to sound condescending in any way so please dont take it that way.

If you are doing 5000k oil then why not just put in the oil that the manufacturers engineers recommend. The company engineers designed the engine and did all the testing and as a result are in the best position to recommend the appropriate oil for it.

I worked as a diesel mechanic with a large country council and the workshop policy was to service all vehicles, from stationary plant and vehicles to D11Cat Dozers, exactly as per the manufacturers specs.

We never, ever, had a diesel engine fail unless operator error or an external factor was involved (cooling system failure, oil line failure etc).

We never, ever, had to rebuild a diesel engine due to wear.

So I say save your money on all the flash stuff and service as per Mr Tojo's book. You will save money and at worst ensure it lasts as long as the Toyo engineers designed, which for a Tojo is a damned long time. You just wont get that warm feeling you get when you spend more spreading some love to your ride. Better off buying your female (or male) friend some flowers or chocolates. That will result in measurable gains in doors that your mechanical love wont repay outdoors. :twisted:

Well, didn't take it to sound condescending, so no worries on that.

Just had my oil change earlier. Went back to Chevron Delo Multigrade 15w-40. It's specific for diesel, CH-4 so it's not outdated, and it's cheaper. Must've read your mind. Hehehe!