best synthetic oil and m/t oil??

[07WYarisRS]

Originally Posted by eTiMaGo

Couple of questions... I'm planning to take a road trip around christmas, and I think I should get an oil change as well as a "just-in-case" checkup before I go.

So I'll be going synthetic after reading the wealth of information in this thread.

Question #1: Redline, Amsoil or Royal Purple come is as highly recommended, but over here, as far as I know, are not available. Mobil 1 seems to be all right too, but what about Castrol? We can get GTX, Syntec, Magnatec, and so on, are they any good? Or else there's the usual Shell and other common brands.

Question #2: It's the tropics here, temperatures only vary between about 25 and 40 degrees Celsius, and I see that most oils sold here are 0W30-0W50, does the ambient temperature make a difference or should I stick with a lighter oil like 0W20 as recommended here?

Thanks!

You can order Amsoil online or I can put you in touch with my Amsoil guy and either he can ship it to you or know of someone or another place to order Amsoil from. Redline is also An excellent lubricant. Royal purple is decent but has had quality control issues in the past that I have seen first had with lab test results. Things like high copper levels, water and even grades being off. I would stick with Amsoil or Redline.
The rest like Mobil 1, Castrol Syntec, Motul, Qstate, pennzoil synthetics etc are all just highly refined crude/mineral based oil. IMO not worth the prices they charge

A 0w-30 wont hurt in any temp however if you live in a tropical climate a 5w-30 is all you really need. Stick with the 30W oils, 20W oils are super light. While they can help mileage ever so slightly too light of an engine oil on a car under heavy load orextremem temps or high rpm operation can shorten the life of the engine.