What oil should I run in my 2011 LX570 - Switching from 0w20-5w30

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Aug 16, 2022
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I am probably way overthinking this.
I have a 2011 Lexus LX570 (3UR-FE) (173kmiles) and am currently running TGMO in 0w-20. Recently I did a long road trip and hit the dunes and noticed when I got back I was half a quart low. (Last oil change was 3500k miles ago) No oil leaks. So I believe my truck would qualify under heavy use since I 4wheel often. The other time its my DD and driving to and from work on Southern CA traffic.

Would there be any downside to use 5w-30 oil? And what 5w-30 oil has moly content similar to TGMO? Currently I have Idemitsu 5w-30 available to me. I change my oil and filter every 5k miles.
 
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I am probably way overthinking this.
I have a 2011 Lexus LX570 (3UR-FE) (173kmiles) and am currently running TGMO in 0w-20. Recently I did a long road trip and hit the dunes and noticed when I got back I was half a quart low. (Last oil change was 3500k miles ago) No oil leaks. So I believe my truck would qualify under heavy use since I 4wheel often. The other time its my DD and driving to and from work on Southern CA traffic.

Would there be any downside to use 5w-30 oil? And what 5w-30 oil has moly content similar to TGMO? Currently I have Idemitsu 5w-30 available to me. I change my oil and filter every 5k miles.
Oil loss is likely due to evaporation. Half a quart over 3,500 miles is really good for an engine approaching 200k miles. Most dealerships don't consider oil loss an issue until 1 quart per 1,000 miles.

No, there are not going to be any significant downsides to switching to 5w-30 oil. You will likely notice a slight loss in fuel economy (<2 mpg)

I would not be concerned with the Moly number. There are two different forms of Moly that are used primarily, Oils that feature >200ppm of moly use a slightly less effective form of moly, while the oils that feature <100ppm of moly use a more effective form of moly.

Any Dexos1 approved 5w-30 will work just fine. The differences between major oils are very narrow these days.
 

chriscosta416

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Aug 16, 2022
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@chriscosta416 do you have any data based justification for switching?
It seems the 0w-20 has worked well to this point.
I have been reading up on using the 5w-30 weight on ih8mud, Overseas Toyota calls for 5w30 and a wide range of weights for the 5.7. In the states it calls for 0w-20 and people are assuming its for CAFE standards. My truck is often loaded up with gear and either bashing through dunes or climbing rocks so I was thinking of switching to a heavier weight oil since my truck would fall under severe use per the owners manual.
I assume a slightly thicker oil would be better for a higher mileage motor as well as often better protection
 

chriscosta416

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chriscosta416

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Why? Hardy Har Har.
Keeping the viscosity at the OEM rec for cold starting to ensure fluid makes it way quick enough to lubricate components and bumping the 20-30 to ensure things stay lubricated and cool at higher temps and RPM

At least thats how I understand it
 
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Keeping the viscosity at the OEM rec for cold starting to ensure fluid makes it way quick enough to lubricate components and bumping the 20-30 to ensure things stay lubricated and cool at higher temps and RPM

At least thats how I understand it
No, but a common misconception.
 
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