Oil Change Intervals & Oil Brands

Those older Titans/Armadas/Patrols are great tough trucks. Shame what Nissan has become.
The newest Y63 Armada/Patrol model (TT V6, 3 row seating, made in Japan) competes well with the LC250 and other SUVs in the opinion of many of the professional reviewers.
 
The newest Y63 Armada/Patrol model (TT V6, 3 row seating, made in Japan) competes well with the LC250 and other SUVs in the opinion of many of the professional reviewers.
A sign of better days I hope. Subjective of course, I just wish the new generation didn’t look like a minivan (a complaint I have with the 310 LXs as well).
 
The newest Y63 Armada/Patrol model (TT V6, 3 row seating, made in Japan) competes well with the LC250 and other SUVs in the opinion of many of the professional reviewers.
They make it in japan now? We loved our old armada with the bose stereo cranked, but it was enormous and everything rattled from day 1. After 10 years it started falling apart - except drive train which was impeccable. Not sure it compares well to LC250, the Sequoia maybe.
 
They make it in japan now? We loved our old armada with the bose stereo cranked, but it was enormous and everything rattled from day 1. After 10 years it started falling apart - except drive train which was impeccable. Not sure it compares well to LC250, the Sequoia maybe.
Yes the Y63 is Japan made and is now the top of the line for Nissan, with a VR family engine from the GT-R, which outperforms the LC250 by just a little bit :)
 
I’m really interested to learn more about your research, because these findings are interesting. If you can share some of your methodology it might shed light on the confusing findings.

The market observation I'll grant you. "different markets don't have identical motors with different tolerance" is a fair point, and the same engine getting 0W-20 here and 5W-30 in Europe or Australia hasn’t been well explained anywhere that I’ve seen. That's an argument about why the recommendation differs. It isn't yet an argument about what the oil is doing in the sump. So:

You wrote "HTHS is what causes the oil to break down BEFORE 10K." Can you walk me through that mechanism, and how you measured it? HTHS is a viscosity measurement taken at 150°C at a shear rate of one million reciprocal seconds. It's a number that describes the oil, the way a torque spec describes a bolt. What's the pathway you observed by which a measurement (HTHS) causes degradation? Oxidation, nitration, fuel dilution, TBN depletion, and permanent VII shear are processes. Which process are you actually pointing at when you state HTHS causes the oil to breakdown early?

Related: you list "~2.5-2.7 with 20 weights." SAE J300 sets the HTHS minimum for the SAE 20 grade at 2.6 and for SAE 30 at 2.9. A licensed xW-20 at 2.5 doesn't exist. Where did your 2.5 come from?

On "this breakdown typically occurs in the 6-7000 mile zone predictably," and "as was shown very nicely by analysis on this forum": how many samples, across how many engine families? And the one that matters more, what did the 30-weight UOAs from those same engines, same mileage, same driving pattern show? And more importantly, as asked above, what exactly did you observe break down? Without that comparison I don't see what the 6-7000 number is measured against.

"the oil is still 99% doing its job." 99 percent of what, and how did you measure it?

On the interval: you say moving to a 30 makes it "very safe to extend oil change interval to at least 7500 miles." What does the 30-weight have more of? Same detergent, same antioxidant package, same starting TBN, same dilution rate in the same engine. If viscosity grade sets the safe interval, what's the mechanism your research uncovered?

"has NO downside." What did you measure to establish that? Did fuel economy delta, cam phaser response time, and oil temperature all get measured as a part of your research? Phasers, chain tensioners, and AFM/DoD lifters are hydraulically actuated and calibrated around a viscosity, so I assume they were all carefully considered in your research.

"It is still the world standard." Japan is on 0W-16 and 0W-8 factory fill. Which standard are you talking about?

The filter point I think is well-proven, at least for cellulose media.
1. The most important point is listed first. Plain and simple. Same motor uses different oils in different markets. Lots of CYA in the manuals too.
2. I have watched MOG, Bob is Oil guy, petrochemical engineers of all sorts etc for years. This is what they say. HTHS is a far more important data point than "grade". I am to be corrected on the 2.5. It is 2.6. BYW, the beloved Toyota oil has a bare minimum as it is 2.6-2.7. No thanks
3. One of the guys on this forum ??Page?? did a very nice analysis and these were his findings. I then looked elsewhere and see the same findings. 0W-20 limps to the finish of a 10K interval.........
4. 99% -50% whatever. At 5K it is still working.
5. Longevity of oil and HTHS go hand in hand. Please don't quantify this with YOUR hands...messy.
6. I just drove up with 5W-30 and a frsh filter at same speed, relative same temps etc as last month with 0W-20. I got the best mileage ever. So, again, my research has shown +/- .1 mpg improvement based on the thinner oil. 23.4mpg. Prior to this I got 23.1 once and ??22.7 a few times.

Finally, your discounting my research suggests you think all the recent motor failures on multiple brands over the past decade or so , many that had recommended 0W-20 oils, some on motors that previously ran 0W(5w)-30, has no correlation to oil...but of course those engineers perfectly planned for those failures? MY GUT OPINION NOW. Ask those engineers if they would have preferred to stay with 5w-30. Ask them if CAFE standard pressures played a role in succumbing to the thinner oils. Ask them if they think thinner oils and high heat generating turbos are good bedfellows.
Japan is a bit part of the problem lately. Nuff said with their standard.
A question I did not know the answer to but am suspicious about. What country first stopped recommending break in oil changes? I lied and checked this from several sources. It was Japan! OOPS!! Might have saved a whole bunch of motors. The recall and manufacturer campaign codes for the affected 2024 Toyota Tundra V35A engines are 25TB14 and 25TA14, registered under NHTSA recall number 26V320. Japan is not perfect.

I am a relatively intelligent individual. I have watched AND read numerous articles, videos, shows on oil. I got interested around 1999 when I got my SVT Cobra early in the synthetic era (for me). I previously owned turbos Impulse RS, RX-7s) and saw first hand what they did to oils. I currently track my 2018 Alfa Romeo 4C with its 1.7 T motor. My Lotus were all SC'd. I have experienced carbon on a ring resulting in oil burn under WOT conditions. I have communicated with Lake Speed on the topic. I have tried Valvoline P&R and been shocked at what it can do. No longer burn oil. Dipstick shiny as new. Put light in filler holes, damn clean looking now. I read, watched, asked and tried............it worked. Aside, but....And yes, motor rebuilds......

Here is my take again. If our Toyota motor was NOT a turbo, I'd be much more likely to leave the 0W-20 alone. Just like those Corollas etc running 0W-8 and or 0W16. But I know turbos cook oils and to a slightly lesser extent superchargers. I had my 2 Range Rovers. The 2016 3.0Sc never went past 10k even though intervals could be longer. At least it was 8+qts! Just looked like old oil. My 2021 RR had the 3.0tt motor and it had a 9+qt capacity. Again 10K max intervals. Man that oil was gnarly on the 2021 that ran on 0W-20. Black! Totally subjective but anyone that has changed oil for 50years knows the difference. My old Impulse RS 1.6 T motor existed before synthetics and the oil looked jet back and dead at 3K miles! Oil coming out of turbos ALWAYS looks more abused. Turbo motors sound more different with fresh oil than non forced induction motors.....HTHS strikes again.

Peace. I simply stated my plans. I have changed based on MY research. The new oil (5W-30) sounds better and makes our motor smoother. I have seen , ironically better mileage. I will hold further judgement on mileage till I rack up more trips. I just went out with wife and started car she drove all last year. Even she says the motor sounds quieter and smoother. All I asked was "what do you hear?" In conclusion, Engineers can fuck up too.......
Our Toyota only takes 5.0qts. Less oil IMHO working harder in a smaller yet higher output motor based on size. We all know, at least those of us that watch gauges, how much time it spends boosted...........
 
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Just to make LC owners a bit less anxious about recommended change interval... my wife's new Defender arrived. We were told to come back in 20,000 miles for the first service. I'm not sure of the reasoning, but now i have another rabbit hole to jump into- any good forum recommendations?
They are full of shi!!! That oil will look disgusting at 20K. Which motor. I commented on the 3.0TT below. They are using 0W-20 too. As long as it makes it a mile past warranty, they don't care. There V8s (ford based) were nightmares for years. I wouldn't dream of that but cleaned fingered Land Rover folks don't want to be bothered with oil changes. I was on those forums. You guys are Rambos compared to those nancies!!!!
 
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Pop a bag for me too! 😆

Also, I will eagerly sign a “start measuring vehicle use in hours instead of miles” petition - I’m totally with you on that.
I will call BS on that. Yanu should know that an hour in traffic v an hour at 60mph at 60 degrees is a totally different level of oil killer. Socrates is dead......wasn't there an old auto philosopher that once said a day in traffic is like a 1000 miles on the oil? That'll keep folks hunting for a while.......
I'd rather run the oil that will survive the worst conditions I EXPECT to experience. Keep the change interval moderate, and if I desire, keep it a long time. It may be my last new ICE vehicle short of a sports car.
My LC has towed a trailer, it was driven in 100 degree(77 dewpoint ) heat. I have been known to pass a line of sheep WOT till completed (yea I'm that guy). Turbos spooled long and hard there.
All fun. Good discussion. Sometimes even in the USA, we need to stop drinking the Koolaid.....
 
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With all that’s been discussed it’s rather foolish, at least in my mind, to let ToyotaCare’s 10K mile free oil change to dictate what is a reasonable engine service oil interval in your vehicle. Obviously folks can do what they want, but my interpretation is it’s a marketing program that doesn’t have merit in my real world conditions - but it may be fine for someone else. I will say if you’re following 10K oil changes I don’t won’t be the one buying your trade-in down the road. I wouldn’t recommend buying a off-lease Toyota for just that reason.

For 27MY see that Toyota is now only doing ToyotaCare for 10K miles - @ 5K rotate, & @ 10K oil change service - then it stops.
 
They are full of shi!!! That oil will look disgusting at 20K. Which motor. I commented on the 3.0TT below. They are using 0W-20 too. As long as it makes it a mile past warranty, they don't care. There V8s (ford based) were nightmares for years. I wouldn't dream of that but cleaned fingered Land Rover folks don't want to be bothered with oil changes. I was on those forums. You guys are Rambos compared to those nancies!!!!
4cylinder, the most "reliable" one, and without hybrid. Wasnt the plan to buy in 2026 but with only the hybrid 6s available for 2027, we bought 2026. It wont see trail duty or heavy towing so is enough. Even if the the oil could last 20k miles, the filter will be in bypass long before then i would think. It will get 5k changes like everything else we have.
 
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Haven't been back to dealer since the day I bought LC........yet she is on 4 rth oil change at 9000 miles......broken in the right way and now running the right oil. Game, set, match...that is my extended warranty........
 
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In one video, this guy said about everything........sad truth....but the oil part is old school common sense.
This one's for YANU

Haven't been back to dealer since the day I bought LC........yet she is on 4 rth oil change at 9000 miles......broken in the right way and now running the right oil. Game, set, match...that is my extended warranty........

Sorry, not listening to AI slop.
 
Take your word on Ray, hadn’t seen him before. Certainly had AI generated content, as the video never showed a picture of a V35A engine the whole Tundra segment.
 
I'm looking to keep it for 8-10 years at least, so I do mine every 3-5k miles (usually closer to 3). Might be overkill, but its cheaper to not risk it. For oil I use kirkland 0w-20 $50-$70 (based on coupons) for 20 qt's and a genuine Toyota filter.
 
Define AI content. So the guy is ficticious? He is an older guy with decades of experiwnce, but because you do not agree with him, you call it AI. THAT SEEMS TO BE THE NEW "DISS". The facts are not. Don't waste your time then. No parrots allowed.
I suppose if you disagree with Lake Speed, he is now AI?
 
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Ray might be a real person but I bet he doesn’t talk like that in real life. AI talks like that.
Pause on any one of the engine pics in the first minute of that video.
All AI.
 
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