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post #1 of 10 (permalink) Old 12-31-2018, 01:07 PM Thread Starter
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how often change from and rear diff and plugs

My previous truck is a tacoma, so I come from the word of changing your spark plugs and differential fluid every 30k. Upgraded to a 2016 tundra, and the mainenance schedule calls to replace those at 120k. How often do you guys replace your front and rear diff, and the spark plugs?

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post #2 of 10 (permalink) Old 12-31-2018, 04:17 PM
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I changed all my fluids and my spark plugs at 50k miles. The transmission fluid was a little dark. All of the fluids in the transfer case and both differentials looked fine. The spark plugs had slight wear.

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post #3 of 10 (permalink) Old 12-31-2018, 04:31 PM
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Originally Posted by Dixon Cider View Post
I changed all my fluids and my spark plugs at 50k miles. The transmission fluid was a little dark. All of the fluids in the transfer case and both differentials looked fine. The spark plugs had slight wear.
I'm headed towards this ^^^ too. I'm at 43,000 on the odometer. 8 Denso plugs on the shelf and 2 gallons of Red Line 75W90 gear oil on the floor for the diffs. I will have a friend with a transmission shop do it.

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post #4 of 10 (permalink) Old 12-31-2018, 04:35 PM
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Originally Posted by McGovTundra View Post
I'm headed towards this ^^^ too. I'm at 43,000 on the odometer. 8 Denso plugs on the shelf and 2 gallons of Red Line 75W90 gear oil on the floor for the diffs. I will have a friend with a transmission shop do it.

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post #5 of 10 (permalink) Old 12-31-2018, 08:05 PM
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Originally Posted by sdiamond808 View Post
My previous truck is a tacoma, so I come from the word of changing your spark plugs and differential fluid every 30k. Upgraded to a 2016 tundra, and the mainenance schedule calls to replace those at 120k. How often do you guys replace your front and rear diff, and the spark plugs?

Thanks,
Diff and transfer case fluid every 40K, spark plugs are good for 120K on a non-supercharged truck no problem.

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post #6 of 10 (permalink) Old 12-31-2018, 08:34 PM
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I vote change everything but plugs every 60,000. Second cycle would include spark plugs. Don't forget to consider including coolant in the cycle.
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post #7 of 10 (permalink) Old 01-03-2019, 08:53 AM
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I have owned 4 Tundras. I use them for sales so I pack on a lot of highway miles but did also use it to pull a 32 ft RV for camping in the summer (not long distances, but probably a couple thousand miles a year). I change oil every 10,000. I have never changed the diff fluids, trans fluid, radiator fluid, or spark plugs yet. I have run them all to about 130K miles without problems. With my new Tundra (15 crewmax 5.7 TRD), I am running Mobil 1 extended life oil and changing the oil every 15,000 miles. I plan to run this one to 300K miles or more, so I will look at changing the fluids at about 200K.
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post #8 of 10 (permalink) Old 01-03-2019, 09:16 AM
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Originally Posted by Mikecol View Post
I have owned 4 Tundras. I use them for sales so I pack on a lot of highway miles but did also use it to pull a 32 ft RV for camping in the summer (not long distances, but probably a couple thousand miles a year). I change oil every 10,000. I have never changed the diff fluids, trans fluid, radiator fluid, or spark plugs yet. I have run them all to about 130K miles without problems. With my new Tundra (15 crewmax 5.7 TRD), I am running Mobil 1 extended life oil and changing the oil every 15,000 miles. I plan to run this one to 300K miles or more, so I will look at changing the fluids at about 200K.
Good luck. Oil is so cheap compared to replacing what it protects. You can't hurt to change it. Granted many people change too often. I believe 7500 is more practical with oil changes. Your oil may lubricate just fine to 15,000 miles but it will get full of left over combustion material that will produce slug regardless of what brand oil you use.
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post #9 of 10 (permalink) Old 01-03-2019, 10:15 AM
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Keep in mind, this is just a data point from my experience with 4 Tundras (and 3 Honda's). I am running Mobil One 0-W20, which is a really good oil. This is 99.9% highway miles (almost no start and stop, no short trips) so the engine is a full operating temp and running about 2000 RPM at 70 mph, so the miles rack up fast while then engine is not doing much work. The oil is very clean at 10,000 miles.

One other thing, I forgot that I did change the spark plugs at 120K on the last truck. They were still in good shape, but there was some wear and it was time to change them. I could not tell any difference in mileage or performance after the change.

If you look up the million mile tundra tear down, they say that that guy did 110 oil changes which is just under 10,000 miles per oil change (he was over a million miles too, we just don't know by how much because the odometer quit registering after 999999). His use for the truck is very similar to mine.
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post #10 of 10 (permalink) Old 01-03-2019, 11:10 AM
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Originally Posted by Mikecol View Post
Keep in mind, this is just a data point from my experience with 4 Tundras (and 3 Honda's). I am running Mobil One 0-W20, which is a really good oil. This is 99.9% highway miles (almost no start and stop, no short trips) so the engine is a full operating temp and running about 2000 RPM at 70 mph, so the miles rack up fast while then engine is not doing much work. The oil is very clean at 10,000 miles.

One other thing, I forgot that I did change the spark plugs at 120K on the last truck. They were still in good shape, but there was some wear and it was time to change them. I could not tell any difference in mileage or performance after the change.

If you look up the million mile tundra tear down, they say that that guy did 110 oil changes which is just under 10,000 miles per oil change (he was over a million miles too, we just don't know by how much because the odometer quit registering after 999999). His use for the truck is very similar to mine.
I personally started using Quaker State. I believe Mobil's 0w-20 is just too thin. Quaker States 0w-20 is just where I like it. Mobil definitely refines their oil to it almost looks like water. Granted, I've used Mobil 1 for a very long time before and didn't have any issues. Its good oil.

The million mile Tundra was a 4.7 engine. I'd like to see a million mile 5.7. I'm sure they'll be one eventually.
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