Why 5000 miles oil change interval I’m a believer

Lab analysis of oil gives an indication. I agree it too is anecdotal in itself, but given enough people doing it, becomes statistically significant.

 

Agree to a point, but it does have its limitations and you have to trend and understand the data. Oil filter deposit analysis is sometimes performed in industry. I work in an industry that frequently performs oil and hydraulic fluids analysis for major equipment.
https://reliabilityweb.com/articles/entry/Understanding_the_Limitations_of_Oil_Analysis

 

Man I love these threads full of self affirmation.

The engine design and robustness probably has way more to do with its longevity than 5k, 7k, 10k+ oil changes.

Take the Hyundai 2.4l / 2.0 (turbo) Theta II engine that are used on certain Hyundais, Kias and the basic design also used by Chevy and few other big guys. This ticking time bomb was a center of a big class action lawsuit where owners basically get a free replacement if they can show regular maintenance records. On top of shitty production techniques, this one is a pure GDI (like older WV engines) and gets carboned up in no time. Aside from crappy bearings, cylinder 2 and mostly 3 walls end up oblong which along with frozen carbonite rings, start chugging oil at around a quart every 500mi.

So no matter how well you baby that thing, it will eventually going to fail. I have one of these at 74k currently and word on the Hyundai forums is it won't consume any oil until it starts chugging. Best part is dealer won't replace it until bearings make a lot of noise or it seizes (sometimes when you're going 80mph).

2gr has been out for a while in various toyota vehicles, seems to be a pretty robust engine. So as long as you make a point to maintain it regularly, I doubt 5k or 10k will make a lot of difference unlike Theta II which will fail no matter what you do.

Some side reading material: www.torquenews.com/108/kia-hyundai-hit-210m-nhtsa-theta-ii-engine-recall-penalties/amp

 

I love the people that over-do everything and trade their trucks every few years. They are the best used vehicles.

 

Amsoil or????

 

Oil change every 500 miles and only running premium fuel. This post has been brought to you by Exxon and Amsoil

 

We do agree, I reworded my response lol.

 

Oh, look, another oil thread! Terrific!

Doesn't the manual specify 5k for "severe" use?

Asking for a friend...
https://www.tacomaworld.com/threads/3rd-gen-diy-maintenance-quick-reference.406712/

 

I change the oil in my drag car every 6 miles and still can’t get a motor to last more than a few hundred miles. Chevy motors are crap

 

Never mind those Toyota engineers, not the FRAME ones!

 

Or the valve cover engineers.
Or the plastic coolant y-pipe engineers.

 

I will stick with 1 year or 10,000 miles.

 

Funny thing is, there’s no mention of a 10,000 mile interval anywhere in my (2015) owner’s manual or warranty/maintenance manual.

Now, to be clear, the 4.0 only shows a maintenance schedule for conventional (the 2.7 shows a 5,000 mile interval for synthetic).

But, point being, I don’t see where the Toyota engineers have communicated to me that I’m good to go out to 10K with synthetic.

I don’t doubt a 10K change for synthetic is reasonable, but I also tow and off-road and get into dusty situations and generally drive the truck hard, so I change it at 5K to be safe.

If I’m missing something in any of the owner’s documentation I’d be interested to know.

 

Meh. My anecdotal evidence:

10k oil changes, 113,000 miles, Blackstone testing starting at 30k (I think). See the results in my signature.

Doesn't burn oil, oil testing has always shown I can go longer between intervals.

 

You're just missing this is the 3rd gen section, and it's a very different V6.

 

Sent my first sample in at 3k. Next one will be 8-10k. Then I'll go from there. I do 5-7k because it's about as much as I travel between seasons. Winter oil change & a summer oil change. Twice a year and I'm good
I thought about trolling blackstone and labeling my sample "supercalafragalisticexpialadoshus" so they'd have to put it on each one
But this is my second new vehicle and I always start with early changes. By the 3rd one I'm at normal intervals (just preference - that's all).

The only sample they ever told me was looking sketchy was for a 5.4l, and they were right. Piston rings and then some.

 

Change to Av-Gas.

 

100% aware, that’s why I put my year disclaimer in there in parantheses.

The interval conversation always seems to go the same regardless of which gen forum it is; this is the first time I’ve noticed that there’s no direction in the 2nd Gen manual to go to a 10K interval w/synthetic. Seems odd that the only V6 interval described is for conventional. Anyway.

Obviously the 3rd Gen maintenance schedule calls for 10K OCIs, I can’t find anything that differentiates between conventional and synthetic.

However, that maintenance schedule also calls for 5K OCIs for certain conditions. The video in post #1 argues that those conditions apply to a lot of owners. I don’t necessarily agree, but the argument that “the Toyota engineers have spoken” firmly on 10K is on wobbly ground.