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What you’re calling “real data” is still just scattered, anecdotal oil analysis that only tells a partial story. Used oil analysis is highly variable—different engines, driving styles, climates, and intervals all affect the results. Cherry-picking a few reports doesn’t establish anything...

There are plenty of oil analysis videos out there on YouTube, but the consistent takeaway is pretty simple: use the oil viscosity specified in the owner’s manual. Pennzoil has historically had a poor reputation. The link I shared suggests they’ve improved over time, but that doesn’t really...

You’re missing my point. I’m not saying don’t question anything—I’m saying understand the limits of what you’re using as “proof.” An oil analysis or two is not controlled testing. There are too many variables: driving style, load, temps, fuel dilution, engine variance, sampling differences...

I am contributing—just not in the way you prefer. I’m pointing out that this is a slippery slope based on limited, uncontrolled data, and people should be aware of the potential risks involved.

You’re looking at a very small, uncontrolled sample and drawing conclusions from it—at best, it’s guesswork. There are far too many variables in a single oil analysis (driving habits, load, environment, maintenance intervals, etc.) to isolate viscosity as the cause. Meanwhile, the...

My logic is pretty simple. If you’re operating in consistently warmer climates or doing frequent hauling/towing, Toyota allows for a heavier oil in certain regions. Mexico doesn’t deal with the same cold-start conditions we do in many parts of the U.S., so a thicker viscosity makes sense...

If I were planning to drive my Tacoma in Mexico for an extended period, I’d follow the owner’s manual for that region—which, per Toyota Mexico, would recommend 5W-30. This really isn’t complicated. It comes down to reading and following the manufacturer’s guidance for the conditions you’re in...

Toyota didn’t just guess on oil weight to hit CAFE numbers. That viscosity is tied to engine tolerances, oil flow, and long-term durability testing. If 0W-20 (or whatever spec) was actually causing widespread wear, they’d be eating massive warranty costs—and they’re not in the business of...

Yes, and that is not necessarily a good thing to happen. I don't think he was doubting that your pressure did go up or down.

I agree. If the oil pressure dropped I would be nervous. That is not typical unless the engine is worn. The kick in the ass would be that Toyota may blame a "defective" engine on not using the oil that is recommended. Reason # 1,568 of why you should use what the manual states.

I have a simple fix to this. Don't have kids and buy a sports car that matches your Tacoma. You will have a ton more money and lots of "toys" to play with and have lots of free time on your hands............................ JK, I have 4 daughters and wouldn't trade them for...

That’s definitely part of it, but there’s more to the equation. Dealerships often make a significant portion of their profit from add-ons like extended warranties, paint protection, and similar extras. Document fees can also add up quickly. In many cases, the margin on the new vehicle itself...

I think oil analysis is useful, but we still have to be careful about drawing conclusions from a single report. There are a lot of variables that can influence wear metals in a sample — driving style, trip length, engine load, fuel dilution, ambient temperature, dust, and even the sampling...

Why would it not be okay? Heck, you could easily run a thicker oil and be fine with those low of miles. Unless you are driving in hot conditions or pulling/hauling heavy loads, you are simply not getting the mileage that you could be getting running with a thinner oil. It is as simple as...

And?

You are so brave sir, so brave.............👏

At the end of the day, it really won't matter which you use. Using 0W-20 will not hurt/break your engine nor will using a slightly thicker oil. You basically will suffer a little MPG with the thicker viscosity and that is about it. I remember "back in the day", my Grandfather would still use...

No one is saying you have to wear your seatbelt going off Road. You assume risks at your own peril. No "nanny state" involved with this one. You are assuming you will still be able to dial. That makes total sense.

You may want to rethink your logic.

Or..........Just wear the device that could save your face from being disfigured and that annoying chime goes away.....win-win