Gizmo607

hi guys, just wondering what kind of engine oils u guys use for you Nx?

Mobil? 5w-20? Or 5w-30

The manual says to use Sae OW-20?

My0gr81

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Why would you chose a different viscosity than recommended in the manual? not questioning your judgment, just want to know if there is a particular technical reason for the choice.

Gizmo607

I usually use 5w-30 for my Audi, thought it would use the same, but I saw that it said Sae 0w-20 just want to know what brand is good because can't just use 0w-20 because the manual said if use 0w-20 need to do an oil change after. If its SAU0w20 what brand would u recommend?

My0gr81

Toyota oil is made by Mobil, so use Mobil 1, but really any brand of 0W-20 that is SAE approved should do, as stated in the Lexus manual. For your Audi, you should use whatever is stated in your Audi's manual too.

Swacer

Do no, I repeat do NOT, go with a viscosity that is not listed in your manual. You are listed as 0w-20 because engines are becoming closer and closer tolerances, and because your turbo shares from the same reservoir.

5w-30 in a motor that calls for 0w-20, would lead to burned bearings and excessive engine wear because the oil will never flow as smooth and thin as the engine requires.

Swacer

I'm not really sure about this. Nissan for example has their own version of oil for their cars which has additives in it to help with the excessive valve tapping from their VVT. When I was looking at the G37, a number of guys on the forums discussed how loud their tapping go when they got away from Nissan brand oil.

So it depends, does Toyota add anything to their oil that you'd be missing if you bought a generic mobil 1 bottle?

My0gr81

Agreed wholeheartedly, use the viscosity specified in the manual.

Have to disagree with this blanket statement about the cause / effect relationship from using different viscosity. Those numbers refer to the oil's cold temperature and operating temperature viscosity parameters. There are situation where adjustments can be made to account for different operating situations, but those should be done with full knowledge of what the specific oil's capabilities are.

Here is a good read on oil, it's properties and what the numbers mean and why they are a guideline to be followed, but also to "guide" in real life usage:
http://www.bobistheoilguy.com/motor-oil-101/

Toyota most probably calls for their own formulation on detergents and additives in their branded oil from Mobil, but at the end, the user manual specifies SAE 0W-20 as a minimum. Any brand that has the right viscosity, as tested by SAE and approved to have their stamp on the bottle meets the requirement stated in the manual. A lot of Toyota dealers use Mobil 1 oil instead of the Toyota branded oil in their bays, unless a customer specifically requests it.

BTW, SAE tests are exhaustive and include minimums for detergents and other additives to resists rusting, shearing and others. There is also API ratings and tests, similar and in most cases overlapping wit SAE's. Most oil manufacturers get both seals on their oils, to ensure that they get chosen by fleet maintenance purchasing managers.

Bottom line, use what is stated in the manual for most driving conditions and only deviate if advised by the dealer or manufacturer to address a specific condition.

ClaudeNX

Eneos 0-w20 is the oil used by most Japanese mfg. Lubricant is mixed in lower East of USA

ClaudeNX

Forgot about Idemitsu who is another lubricant mfg to Japanese mfg, great products