The End of the Oil Change Interval Discussion

As long as you drive the vehicle for 10-15 minutes before shut downs the oil will get hot enough to evaporate and moisture from condensation.

 

Oil isn’t the problem. A shitty engine design by GM is the problem.

 

I’m betting the grade change is a cosmetic or slight band-aid like the Theta II knock-sensor update

 

GM probably hopes it will get people past the warranty period so they are off the hook.

 

I didn't watch the video, but I know they've had some valvetrain issues with the V8's in the Silverados. My shop buys all Chevy trucks, and a bunch of them have needed work on the lifters (I think) generally before 50K miles. Too bad, because it’s a great drivetrain otherwise (so far).

 

My dad is a loyal bowtie owner. Won't buy any other make. He purchased a new 2022 Silverado with the 5.3L. He's 89 years old....cruising down I-80 at 65mph.....4K miles on the odometer....his Silverado starts chugging/bucking/running like crap....finally shut down and he pulled off onto an exit ramp. #4 main bearing was the culprit after engine tear down. Had to fight GM to get a new engine. Have been told the newer V8s from GM have this problem.

 

You didn't watch or didn't understand the video.

Let me explain the main points to you:

a. This issue was about oil being too thin, causing bearings failure during high-load low RPM driving.
b. Manufacturers conducted studies to determine how thin oil could get before engine fails, this was done to improve EPA fleet averages at the cost of engine longevity
c.. Higher viscosity oil and early first oil change is GM solution to this.

This is important because:

1. We have definitive proof that car manufacturers know they are recommending oil that is too thin.
2. We have an example of car manufacturer changing oil spec to thicker oil.
3. we have another example of car manufacturer recommending early oil change as a preventative measure.

Base on that I reached following conclusions:

i. Early oil change was the right thing to do. Metal debris was mentioned as one of the contributing factors.
ii. More frequent oil changes are important if you use spec oil, as it is 'on the edge of acceptable'. Any oil break down or degradation, such as fuel dilution and you will not have sufficient bearing lubrication.
iii. Doing exactly opposite on OCE of what you espousing in your posts is exactly the right thing to do for my vehicle.

 

And if it’s a vehicle you will own for 80k miles who gives a f? It’s the next owner’s problem to deal with

 

I would not be buying a 4Runner if I wanted to pass it at 80K..
and I would think most people on this forum are on the same boat.. unless you are leasing... why would you?

 

People, please. It’s 10k OR 1 year. I have been doing 10k intervals on all my vehicles and all were high hp turbo cars which are the hardest on oil. The least strained engine had 25psi and it still went 10k and the oil was fine. The number one issue here is cheap owners putting cheap synth mix in their car and saying it’s full synthetic and damaging their engine. If you use high quality synthetic oil, 10k is more than fine. They test them for 20k and even at 20k it’s more than fine but they know you’re heads would explode and you love spending money so they cut it in half to be “safe” and said 10k intervals.

I was a technician for 14 years so not just an uneducated opinion here

 

you forgot oil dilution..
even with high quality synthetic oil, the problem is still there, hence the frequent changes are better.

 

I do with any of my vehicles since I started buy new @ 24 years old. Want the higher trade in value & I don't fall in love W/a vehicle. I may really like it but it's just another product that has it's uses.

 

No I didn’t, again the oil is tested at 20k + miles per change and found to be in spec or better. The. The OEM cut that in half to give people the warm fuzzies and people still say the engineers have no idea what they are talking about. The very same engineers they praise for making this reliable engine lol. But hey, I guess oil is where everyone with an opinion knows more than the millions of miles and thousands of hours of study advanced engineers do.

 

Fully agree except the 12mo test that Project Farm did on oil in his Cummins. He had the new oil lab tested and compared it the used oil (only 3,500 miles w/short trips) after 1yr and it showed virtually no degradation or elevated acid content.

 

None of that matters if you start with a quality engine. The 5th gen does perfectly fine with

$52 0w20 oil Toyota/ exxon mobil Case of 6 Quarts Full Synthetic TGMO SN 0W-20 Oil

0w20 oil. Like I said this sounds like a plan by GM to get engines to just make it past warranty.

 

Yes, 1GR-FE V6 is one of the GOAT engines that you could get away with neglecting. Good luck if you do that on 6th Gen.

 

To stir the pot more we have a 2014 CT200h ticking over a million miles with 20k mile intervals.

Obviously a highway hero but...

 

Not according to Toyota, but what do they know?

 

This is a long ending

 

It looks like they replaced almost everything except the engine even with 20K oil changes.

 

Holy hell
You mean to tell me that thing has a CVT and they didnt have to go in the trans once at a million miles? Holy hot dang.
Tire rotations at every 5,000 miles, no wonder they needed so many wheel studs. Idiots at the shops breaking them off basically rotating the tires every week or two. Crazy they'd go in and rotate the tires weekly but wont do the oil but every 20,000 miles. What a tard. I suspect they buy the tires from the dealer and get those free tire rotation promos and use the heck out of it but since the oil changes probably cost $100 they stretch them out as far as possible.

 

Dats nice

In a vehicle that is not loaded heavy, and runs the highway non stop at highway speeds, he is clicking off so many miles that if he were at 5,000 mile oil changes he would be getting the oil changed every other week or so. Going to 10,000 mile oil changes simply allows him to not have to be in the oil change lane at the dealer as many hours a month as he's on the pot taking a deuce. If he was towing a big trailer and loaded heavy, i wouldnt ever think of trying to push the oil change intervals out. Its crazy he's done it twice, wonder if Toyota gifts him another new truck. Doubt he takes a new 2025 to a million miles but it would be nice to see if he could do it. It took him 11 years to do it the first time and looks like 11 years to do it the second time. This kinda averages to about 90,000 miles a year or about 7,500 miles a month. Thats like driving from Jacksonville Florida to Los Angeles California, then back to Jacksonville, then back to LA, and making it back to Tuscon every month. Thats not really unheard of in trucker world but its a heck of a pace to keep up with every month for 10+ years.

Brake fluid? You change your brake fluid? I've had multiple vehicles to 300,000 before and never changed brake fluid in any of them....

 

Did you change the brake calipers at any point or were they leaking...

 

I have had to change a brake caliper on an 89-95 2wd pickup once, let the pads wear too thin and spit the backing plate out and hyper extended the piston.
I have had to change calipers on a 2005 Tundra due to caliper sticking. When i did this i put on new rotors, calipers, pads, and flushed the whole system cause it was a bit gunky and 19 years old.
I have not had any other caliper or brake issues on any of my other Toyotas and i have had a lot of them and racked up a lotta miles. I think the main reason is i run them hard and dont keep them long enough. Not uncommon for me to put 40,000 miles a year on one when i am driving it hard, in which case in 6-8 years i am well into the high 200s and then get rid of it. I had an 89 Toyota get to 280,000 before i wrecked it. I had a 92 Toyota get to 300,000 before i sold it cause the timing chain was rattling so bad but i didnt wanna break the engine open cause of previous issues splitting one of those engines open. I had a 2008 Tacoma that i sold at 275,000. I currently have a 2008 4Runner with 260,000 miles. I normally rack up the miles in a short amount of time and sell the vehicles before they get old. The 2008 tacoma i sold at 9 years old with 275,000 and honestly didnt do much of anything to it other than beat on it and put oil in it. That truck is still driving around today on what i believe is its 4th owner now. The current 08 4R i bought in 2019 with really low mileage and have racked up over 160,000 since i got it. I might should check the brake fluid but i probably wont.

 

Why is he a tard for not changing the oil more frequently? He got over a million fucking miles out of the engine and counting. The people insisting on wasting time and money on oil changes seem to be the real tards here.

 

Rotating the tires bi weekly, but the oil monthly. Thats the tarded thing.
Why not rotate the tires monthly while you are getting the oil changed?
Why not rotate the tires every other oil change?
Do you rotate your tires between oil changes?
Thats the weird thing here, not the oil change interval.

 

Because he wants to maximize the life of his tires and get even wear.

 

The planetary gearset/planetary power-split/eCVT type of CVT's (usually you see it referred to as an eCVT) are a virtually bulletproof transmission. You see them most commonly in Ford and Toyota hybrids and are exclusive to hybrids.

It uses gears combined with the gas engine and two electric motors to act continuously-variable, but has no relationship to the much less robust pulley CVT's that you're probably thinking of. Despite both technically qualifying as CVT's, they are completely different beasts.

I dare claim the only way you can go simpler is with a gear reduction box or direct drive for an electric motor.