I can’t get a straight answer

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I would like to point out to Toyota owners that it wasn't that many years ago that Toyota had a major sludge build up problem on the 3.0L V/6 and 2.2L 4-cyl engines which began right after they upped their recommended oil change interval to 7500 miles. There have been many owners who stuck with the old 5000 mile change interval and never had the problem, myself included. Subsequently, they went back to the 5000 mile recommendation (which they have since gone back on) and installed a 5000 mile oil change reminder light. The problem went away. IMO, unless the majority of it's miles are on the highway, I would stick with 5000 miles.
 
Following the owners manual is not the best advise as they have been know be be wrong from time to time.🤥

Take a look at the attached: 5w30 only good till 50degrees F but 20w-50 good to zero.

That makes sense? they think 5w30 is good from -30f to 50f
and 20w50 is ok above 0f.

I'm confused how you confused that?
 
Following the owners manual is not the best advise as they have been know be be wrong from time to time.🤥

Take a look at the attached: 5w30 only good till 50degrees F but 20w-50 good to zero.
giphy.gif
 
In Japan they do oil changes every 5K km even with synthetic oil.
Yeah OP is in the US and the vehicle is probaby built in the US. So just follow the severe service schedule and change it every 5K miles or every 8K KM if you're in Japan, or 7500km in Germany or if you're below the Equator every 6250Km but if you're in Australia its every 0008KM because they're the land down under
 
If all I cared about was making it through the warranty, yeah I’d do 10,000 mile oil changes, but I like to keep my vehicles to 200,000 plus...and at that point Toyota has long since stopped caring about your engine or you the customer. You’re done after the warranty.

When you’re at 120,000 miles and you start “using a bit of oil”, that’s now your problem...and when it gets worse and you’re sitting there wondering whats going on and you saved a few hundred bucks on not doing some oil changes and now you’re staring down buying a new car sooner than you wanted or doing piston rings and absorbing a 2-3 thousand dollar job? I’ll take the 5,000-7,000 mile oil change.

And for a lot of us, the 10,000 mile Toyota oil change doesn’t fit our driving demands (cold weather, short trips, towing, hauling, city, stop and go).
 
If all I cared about was making it through the warranty, yeah I’d do 10,000 mile oil changes, but I like to keep my vehicles to 200,000 plus...and at that point Toyota has long since stopped caring about your engine or you the customer. You’re done after the warranty.

When you’re at 120,000 miles and you start “using a bit of oil”, that’s now your problem...and when it gets worse and you’re sitting there wondering whats going on and you saved a few hundred bucks on not doing some oil changes and now you’re staring down buying a new car sooner than you wanted or doing piston rings and absorbing a 2-3 thousand dollar job? I’ll take the 5,000-7,000 mile oil change.

And for a lot of us, the 10,000 mile Toyota oil change doesn’t fit our driving demands (cold weather, short trips, towing, hauling, city, stop and go).
I agree. They definitely don’t care when it’s out of warranty. Heck you are lucky to get them to warranty something anyway.
 
If all I cared about was making it through the warranty, yeah I’d do 10,000 mile oil changes, but I like to keep my vehicles to 200,000 plus...and at that point Toyota has long since stopped caring about your engine or you the customer. You’re done after the warranty.

When you’re at 120,000 miles and you start “using a bit of oil”, that’s now your problem...and when it gets worse and you’re sitting there wondering whats going on and you saved a few hundred bucks on not doing some oil changes and now you’re staring down buying a new car sooner than you wanted or doing piston rings and absorbing a 2-3 thousand dollar job? I’ll take the 5,000-7,000 mile oil change.
Yes, there is always a conspiracy theory hiding there somewhere, just waiting to get us.

Is there really a relationship between OCI and oil usage? Obviously, if your car is using oil, then it's going to use twice as much of it over the course of 10K interval compared to 5K interval, but aside from that?

If short OCI is the solution to all problems, we should all be changing our oil every week. :)
 
Yes, there is always a conspiracy theory hiding there somewhere, just waiting to get us.

Is there really a relationship between OCI and oil usage? Obviously, if your car is using oil, then it's going to use twice as much of it over the course of 10K interval compared to 5K interval, but aside from that?

If short OCI is the solution to all problems, we should all be changing our oil every week. :)
That’s 500 miles for me :)
 
Yes, there is always a conspiracy theory hiding there somewhere, just waiting to get us.

Is there really a relationship between OCI and oil usage? Obviously, if your car is using oil, then it's going to use twice as much of it over the course of 10K interval compared to 5K interval, but aside from that?

If short OCI is the solution to all problems, we should all be changing our oil every week. :)
And there always are going to be people thinking there isn’t.

Hey, why change oil at all, right? Boogie man isn’t going to reach from under your bed and tickle your ankles, right? Don’t change your oil, you’ll be safe. 😁

And aside from going twice the length, I guess you could add...oil going twice as long would accumulate soot, form sludge and cause oil rings to stick and become clogged. Again, not within a warranty period, but beyond that, no?
 
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Hey, why change oil at all, right? Boogie man isn’t going to reach from under your bed and tickle your ankles, right? Don’t change your oil, you’ll be safe. 😁
My suggestion was to change the oil according to the manual, which says 10K miles / 12 months at most, not never. :)
 
5000 miles is a very acceptable interval for a Conventional oil. plenty go to 7500 on Conventional. 5000 oci on synthetic ... I wouldn’t do unless the engine has a deficiency, in which case I wouldn’t put money into synthetic. With synthetic I would am fine with 10k intervals, unless the vehcicle is strictly short-tripping and never reaches op temp.
 
The "correct" OCI depends on several things. The first factor is how the car is driven. If you drive primarily longer distances (>30 miles) at highway speeds then a 10,000 mile OCI may be fine. In conjunction with that is how do you drive the car in stop and go traffic-how heavy is your right foot. Another factor is the oil and filter brands. There are a zillion oil threads so I won't go there. Just use what the owner's manual sez to use as far as oil. But, the filter brand is critical. Cheap p[arts store brand filters are typically of lower quality than filters made by the supplier to auto manufacturer. For instance, the supplier of oil filters to BMW is Mahle. I buy only Mahle oil filters for my car. The true arbiter is used oil analysis (used oil analysis). Blackstone Labs is considered the gold standard for a used oil analysis.
 
The "correct" OCI depends on several things. The first factor is how the car is driven. If you drive primarily longer distances (>30 miles) at highway speeds then a 10,000 mile OCI may be fine. In conjunction with that is how do you drive the car in stop and go traffic-how heavy is your right foot. Another factor is the oil and filter brands. There are a zillion oil threads so I won't go there. Just use what the owner's manual sez to use as far as oil. But, the filter brand is critical. Cheap p[arts store brand filters are typically of lower quality than filters made by the supplier to auto manufacturer. For instance, the supplier of oil filters to BMW is Mahle. I buy only Mahle oil filters for my car. The true arbiter is used oil analysis (used oil analysis). Blackstone Labs is considered the gold standard for a used oil analysis.
A used oil analysis is the true arbiter of oil filter performance?

And Blackstone Labs is nowhere near the “gold standard” for a used oil analysis.
 
Is there really a relationship between OCI and oil usage? Obviously, if your car is using oil, then it's going to use twice as much of it over the course of 10K interval compared to 5K interval, but aside from that?
The theory is, if you change the oil more often, the engine (including piston rings) will stay in good condition longer and delay the onset of oil consumption. So based on this theory there may be a relationship between OCI and oil usage over the long term.
Also I have heard that oil burners will use more oil right after a change (consumes more fresh oil). As the miles accumulate and the oil becomes more oxidized, the engine consumes less oil. Again this is all theory and there's no scientific proof, just trying to address your question to the best of my ability :D
 
My father has a 2017 Camry with the 2.5 i4, Toyota says that if synthetic oil is used 10k oci is fine. Others are saying go 5k...which is it?!
I do my wife's 2015 Camry about 7-7.5k miles on Castrol Edge/Magnatec or Kendall GT-1 Max.
 
My father has a 2017 Camry with the 2.5 i4, Toyota says that if synthetic oil is used 10k oci is fine. Others are saying go 5k...which is it?!
My Corolla says 10k or one year. But every 5k you're supposed to go in for tire rotation and check over of things. I split the difference quite often at 7500 which is about every 6 months for me. I do about 65-70 miles round-trip each day so it heats up ok. About 20 miles on interstate, the rest 35-45mph in town with few stops.

I'd really be more concerned about the types of miles. Lots of short trips is usually harder than longer trips or highway driving. Lots of factors to decide. But the maintenance manual will tell you.
 
My Corolla says 10k or one year. But every 5k you're supposed to go in for tire rotation and check over of things. I split the difference quite often at 7500 which is about every 6 months for me. I do about 65-70 miles round-trip each day so it heats up ok. About 20 miles on interstate, the rest 35-45mph in town with few stops.

I'd really be more concerned about the types of miles. Lots of short trips is usually harder than longer trips or highway driving. Lots of factors to decide. But the maintenance manual will tell you.
I figure it's all severe service driving in urban Texas. So about 5000-6000 with a thick 0w-20 for me.
 
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