0w-20 vs 5w-30 what is better in terms of protecting against wear? Brand of oil matters?

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I am independent AMSOIL dealer. 
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[tundrasever]

Just like people in the forums guessed! 5w30 is better for the 3ur-fe ! I might just run this for summertime here in Texas currently 103 degrees. And switch to 0w20 in the winter

[wailingalen]

I got a 23 Jeep Wrangler 3.6. Just did my first oil change at 1000mi and second at 5000mi. Pennzoil Ultra Platinum (full synthetic) manual calls for 0w-20 so that's what I use.
Be sure to do an early oil change at 500-1500 for engine break-in wear prevention 😇

[daveroski]

Direct injection/turbo w gas dilution is the reason to change every 6 months especially running 0-20. Makes it even thinner. But testing oil is the only way to find out :)

[benniestander]

I live in a warm temperate climate. In winter we might get 3 or 4 days that the temperature goes to -1 to -3 Celcius. But the rest is above. In the manuals we get a few oil weight options. And I always go with the higher weights. Not the highest mind you. And I never had an issue arise because of oil. Then again I change oil regularly. At 6 months or 5000 km for conventional and 1 year or 7500 km for full synthetic, whichever occurs first. 100% Synthetic is almost impossible to find here.

[CWB]

I just stick to whatever the manufacturer recommends as listed. Although, i use full synthetic(4k-5k) over synthetic blends(max 3, 500 intervals). Been working great so far in all of our vehicles here in NC.

[johnwitherell]

What a great test. The results don't lie!

[isaacpalmquist]

I just use 0W20 as recommended and change every 5-6k miles. Oil is cheap engines are expensive.

[skatingsam]

It's only in America that we really have these arguments. Other countries get a whole oil chart, with a bunch of different oils, and what climates and conditions are best. But in America they will tell you one. I have 2 late 90s civics with the same engine. One bought here in America and one bought in Japan. The American one says 5w-30. The Japanese one has a graph, and based on the graph, the actual best oil for this engine is 10w-40. So I use 10w-40 in both after reading the Japanese owners manual. Neither burn oil, and both engines are running so smoothly and quietly

[akyukon]

Living in Alaska, with summer temps averaging 60F, but winter temps around -20F, -30F, I think I'll stick with the 0W-20 in my 5.7L Tundra.
Do you like the Supertech oil? I havent used it, I usually use Mobil 1, but its getting very expensive here. Ive also heard the Kirkland brand is very good.
Thanks brother!

[googleaccount]

My truck calls for 0w20 but it loudly rattles, vibrates & ticks with 0w20.
It runs so quiet & smooth on 5w30

[spartus]

0w20 was created for CAFE requirements, and the stupid CAFE credits.

What is the goal that the manufacturers are aiming for ? Is it to eek out every last drop of fuel economy ? (0w20, 0w16) or to have the engine last as long as possible with out any major repairs ? (5w30, 0w40)

Answer this question and you will know what oil to use.

[johnf.]

I own a Ram 1, 500 with 5.7 hemi, I live in the desert it gets hot 100-115’ in summer. The recommended oil is 5w-20, however I switched it to 5w -30 full synthetic, and noticed it is quieter now. I think I will continue using the 5w 30. Do you think that is a wise choice?

[alexsanabria]

We had our first oil change on a 2024 Kia Seltos. In the manual said 0W-20 but the kia service center put 5W-30. I guess that is for the hot climate in summer?..We live in Texas.

[vzsoltie]

In my Mazda 3, both oil viscosities are allowed. However, the engine consumed the 0w 20 oil but did not consume the 5w 30 oil. 1.5 100 hp Mazda 2014 petrol.

[AEVMU]

Same engine on other models wont have smaller or larger oil galleries/drain holes. If that other model reccomends a different oil weight its because the manufacturer expects either different driving/environmental conditions, or they are not limited by CAFE requirements. In the US my engine takes 0w-16. In europe, same exact engine in every way, can take up to 5w-30 as specifically stated in my owners manual. 0w-20 is fine if the engine was designed and tested for it. But going a touch thicker is fine.

[Cubasenet]

In Europe Opel, Peugeot, Citroen, Ford (Stellantis group), and Volkswagen, Audi, Seat and Skoda (VAG group) used to recommend 5W30, but no more. Nowadays (2023-2024) are recommending and using 0W20 oil for all their engines (only exception being some industrial pickups).

[sezwo]

It depends on engine and also type or frequency of driving. If car is driven frequently over shorter distances vs. rarely but over long distances a thinner oil is better. Frequent start-ups put more wear on an engine. I drive my older Subaru Impreza only a few times a month but each time over 200 miles. I use a much thicker oil than required (I like straight 40 weight). If I were starting it frequently and making short trips I would prefer a thinner oil.

[oldbiker]

I have been using 10/30 in my 1991 GMC 1500 with 465 k on it

[tardeliesmagic]

On my 2015 Yaris 1.3L i use either 5W20 or even 5W30 in summer BUT always use 0W20 in winter.

[mr.mr.]

I think the Toyota 5.7 for sure needs 5-30 in warmer states. Fun fact, my Mazda 6 turbo requires 5-30. Exact same engine non turbo is 0-20. Why do you think that is?