Switching to 5w30?

Why not use a boutique oil in 0W-30?
I like Amsoil Signature Series Engine Oil.
A true once a year OCI.

 

The average Mexican citizen is dirt poor. No trading vehicles every 3-5 years for the average Mexican. If they even have a vehicle, regardless of age or condition, that gets them from Point A to Point B, they are happy. So...Yep, style, gas mileage and environmental efficiency is not on the average Mexican's priority list.

 

Thats False Information - As a automotive technician of 20+ years I can say the 5.7 has not underwent any "tolerece" or bearing clearance changes since its introduction in late 2006 . this engine will have zero issues taking 5w30 or even 10w30 oil . It is actually suggested right from toyota in hot climates around the world .
0W20 or 0W16 is called for in north america vehicles strictly to satisfy CAFE regulations . that is it !
0w20 is fine if you are using the truck for normal urban commuting , I suggest switching to 5w30 synthetic if you tow or putting any extra stress on the engine . as a bonus the 5w30 quiets down the "diesel" sound from the valve train .

 

0w-20.

 

The big picture,,,
0w20 is not such a watery like oil that is does not protect our engines. 5w20 is acceptable in the US for short periods of use.
5w30 only increases the hot number and still keeps the same 5w initial. If you look at true scientific papers on oil viscosity there is not some huge differences in oil weights. It's more important to have clean filtered oil.
I would not use 20w50 in my climate and my service schedule. Common sense.

 

Interesting. Where did you get this? Are there certain conditions where this is needed? Like infrequentt start up?

 

There are a couple manufacturers out there. Masterlube, Canton, and a off brand I dont think will last long. I like to tinker with everything. I have two units, one on a 5VZFE and a 3UR. They dont have dry starts and starting amperage draw is almost half. I hook into the oil sending port or ports on the v6. It's just my thing. My Tundra sits sometimes for weeks.

 

Wow, half the starting amperage. It may be worth it just to prolong the life of the starter since it is a bear to replace

 

I have 2021 Tundra limited now with 15000 miles. I have been using Mobil 1 0w-20 full synthetic since new and the engine has the typical Tundra diesel like ticking noises. Mine also has spark knock since 3000 miles which two dealers claim normal. I just switched over to Royal purple 5w-30 full synthetic today and man what a difference!!! Engine's ticking noise is significant reduced to near none existent and even spark knock is reduced. As a bonus I saw my mpg in low 20s. Worth every penny. $37 @ walmart for 5qt jug.

 

Yeah you switch you can tell these engines prefer heavier oils and the 0w20 was just to meet CAFE. I run 5w30 in the winter and 15w40 in the summer.

 

Got 42k in on trade in Ohio. Dealership asked 44k when selling it.

 

15w40

I don't have the balls to run that heavy of a weight. That's what my 7.3 takes, and alot of people even go to a lighter weight in the 7.3s and 6.0s, 5w40. I run 5w30 in the tundra. What makes you run such a heavy weight?

 

Interesting thread.
Got factory oil in the longbed right now.

 

I did ALOT of research before switching oils. First I realized that the same 5.7 in the Land Cruiser world wide could use a huge variety of oils all depending on which country you were in. Then I actually paid for TIS subscription to save a bunch of service manual stuff to have for maintenance and right in there is Toyota recommending 0w20, 5w20, 5w30, 10w30, 15w40, and even 20w50 if you have the same exact truck but are in Mexico. Meanwhile above that you'll see for the USA and Canada, it can only have 0w20. So basically this engine can accept a wide variety of oils, just be smart and choose the right one for what the weather is where you live. For me 5w30 is more than sufficient for the winter and 15w40 is more than sufficient for the summer, plus its what my motorcycle takes so I can use the left over in it since T6 is one of the few car oils that is speced to also work with wet clutches on bikes.

0w20 was basically invented to increase MPG, but not to the amount a consumer can benefit but to the point where if you save .002mpg over 2.2 millions cars, its huge for their CAFE standards. For the consumer though it definitely doesnt help your engine last any longer. The only way I would use 0w20 is if I lived where it was below 0 every single day.

 

My Tundra is approaching 100k miles and have gone with the 5w30 as well. Much quieter running with a little higher oil pressure but the best thing is my gas mileage actually increased about .75 miles / gallon. I probably would not have done this if living in colder climate but here is southeast Texas seldom below freezing. There has been pre-lube systems on the market for years, in fact Caterpillar had pony engines to turn over their diesels until oil pressure built up then you would close the compression release to start diesel. Also of note, there is a pressure relief valve that by-passes oil to keep from blowing filter or breaking oil pump shaft due to heavy oil not passing thru filter. The theory is dirty oil is better than no oil.

 

Just for reference 5w30 is good down to around -25°c(-13°f) and 15w40 T6 is safe down to -15°(5°f). 0w20 is good down to like -40°c so in all reality unless your in a super cold climate 5w30 is plenty of protection in the winter and 15w40 is plenty until winter hits. I switch from 15w40 to 5w30 in October and then switch back in April.

 

I use 5w-30 and change oil every 5k miles. My engine is much quieter with the 5w 30. I work in manufacturing and the tight tolerances argument for 0w 20 is utter BS. Look at the recommended oil for the same engine in other countries in Toyota manuals, 5w-30. Are their engines looser tolerance? Come on....it's 100% for government CAFE fuel ratings.

 

I was thinking about trying 0W-30 in my truck if I could find such an animal.

 

Nice! I may switch to 15w40 for fun this coming summer after reading that. I know the additive packs are much more robust in diesel oil. You should definitely do a UOA on your next oil change! I wanna see the results lol

 

You could always go with 0w40

 

Not that I think you'd have any issues with it but out of the range of oils 0w30, 0w40 or 5w40 is not one Toyota ever listed for the 5.7. List of acceptable to oils according to Toyota.

0w20
5w20
5w30
10w30
15w40
20w50

 

Guess I'll try 5W30 after my warranty is up. My engine is noisy when it's warm but my truck sits outside all winter, though I do have a block heater timer.

 

Hell, I'd just go with this. I mean even though we agree that Toyota engineers make a rather reliable truck you damn well know their pulling a fast one by making us use the wrong oil. Don't let anyone tell you what to do. Tomorrow on the way to work I bet those damn civil engineers made the freeways crazy on purpose and if you actually jump in the left side of the road you'll get there way quicker. Windshield wiper fluid = start using acetone, you won't believe how clean your windows become. I mean the paint will start running off you truck but you showed those damn engineers who said only use windshield washer fluid. Brake fluid, my buddy Cooter told me it's just olive oil and they increase the price.

 

5w-30 is where it’s at.

 

Here's a UOA of my 5w30. Better than my UOA with 0w20 that had less miles on the oil.

 

I would like to know more about this. Do you have a link or install video?

 

Huh. That sheet also shows a different standard capacity. Everything I've found online shows 8.5 quarts for a oil and filter change. I haven't done my first oil change yet, though. I need to go find my book and double-check.

 

I've done all 7 of my oil changes and it takes much closer to 8.5 quarts each time to get to the top dipstick line/dot/mark.

 

Yeah not sure what thats about but here is the document I downloaded from TIS showing the correct capacity and the oil recommendations. I dont really care what anyone else uses in their engines, just like to put out the information that Toyota actually recommends more than just 0w20 for the 5.7.

 

Thanks. I was just being being puzzled. That's a normal condition at my age anyway