Synthetic Oil

Hi Glenn
If its new I would do whatever Toyota tell me until out of warranty otherwise I am sure they would deny warranty on an engine claim

Of course you can run synthetic !!!
Toyota will have a list of oils that comply with their specs.
A few of the new "high" tech diesels specify synthetic only.
You can stick to whatever toyota gives you, but that might be different from dealer to dealer ? If Toyota have a "Toyota" brand oil it is probably made by x brand oil company anyhow ?

I did the same with pajero when new.
Ran it on the oil used by Mitsu until running in had happened, about 20,000k, then changed to my preferred oil.
Looked at the specs and chose an oil, then talked it over with the service manager. I took my own oil in from then on for them to use. Now some on this forum would say that it was a waste of time, it most probably got put in the managers or chief mechanics car.

Running synthetic is money down the drain on the 1HD-FTE, unless you do what Roachie does.

Your Toyota dealer will use a multi-purpose oil that they can put in a range of vehicles. It will most likely be a CF grade. Oil change intervals are 10,000k on your diesel anyway, unless you are using it in tough conditions. I also have a 1HD-FTE, but admit to changing oil every 5-7,000k because I feel better :-))

IMO, just stick with what they give you. Your engine will not wear out during your ownership!

Synthetic is superior in every respect... except price.
It would never invalidate your warranty as long as it meets Toyota specs (which it would pass with flying colours.)
It's all a question of dollars.....
I would rather run synthetic any day if I had a choice.
I run synthetic on everything I own (mower, cars, generator etc.) and have never looked back.
Cheers

Most of the oil makers have fully synthetic (FS) oils aimed the the long haul trucking industry - extended drain intervals - along with high spec filters in the mix , it must be a good idea (those truckers have to do their sums carefully). If the FS specs match those in the cars manual, price should be the only barrier. I use FS in my gbox and trans case. Re trucks - I have a rello in the game - when his new truck goes in for a service they check the oil - if in spec it stays there (but it goes at 80,000 anyway) - the situation covered by Roachie above. I dabbled with Catrol Dynamax 10-W40 FS for awhile (20L drums) - about the same price as the Magnatec (5L packs) I now use.