High mileage vs regular oil?

Swordfish

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My car has about 50k miles. Have stay on top of all oil changes. Is there any benefits to using high mileage? It's not yet 75k.

Does high mileage have a more additives vs regular? I'd be willing to lose mpg and pay more for more additives and greater engine wear protection
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There are elevated wear ingredients, but the primary difference is that the additive package contains ingredients that slightly swell rubber parts like the front and rear main seals.
If you’re not dripping oil onto the ground I wouldn’t bother.
 
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My car has about 50k miles. Have stay on top of all oil changes. Is there any benefits to using high mileage? It's not yet 75k.

Does high mileage have a more additives vs regular? I'd be willing to lose mpg and pay more for more additives and greater engine wear protection
In relation to the prior comment - i've also been told that the primary benefit is that the higher mileage oils is to help the seals expand which means once you start using it, you shouldn't stop because of the adverse effect. So in other words if you don't have a problem, don't try to solve it. 50K on a honda is not high mileage. I never used HM oil on any of my Hondas and never had any leaks. If you are so inclined, I would at least wait until well over 100K.
 

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sales gimmick. continue to use what you currently are using.
 
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In relation to the prior comment - i've also been told that the primary benefit is that the higher mileage oils is to help the seals expand which means once you start using it, you shouldn't stop because of the adverse effect. So in other words if you don't have a problem, don't try to solve it. 50K on a honda is not high mileage. I never used HM oil on any of my Hondas and never had any leaks. If you are so inclined, I would at least wait until well over 100K.

Thanks that's what my impression was. The ingredients slightly swell the rubber seals which become brittle over time. My car is about 3 years old so the seals are still fine and the car does not leak oil. I also noticed high mileage is slightly more expensive, but it's not that big of a deal. Didn't know if there was any benefit to doing it early, but I'll probably just keep running standard 0-20 then
 


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Thanks that's what my impression was. The ingredients slightly swell the rubber seals which become brittle over time. My car is about 3 years old so the seals are still fine and the car does not leak oil. I also noticed high mileage is slightly more expensive, but it's not that big of a deal. Didn't know if there was any benefit to doing it early, but I'll probably just keep running standard 0-20 then
For sure. If you want to spend a bit more money to ensure your maintenance is second to none i'd make sure you are using a high quality synthetic oil, good filter, and changing it every 5K as opposed to what the maintenance minder would have you do. Although It seems most of us don't have a big issue with oil dilution, the little bit that gets in there can build up over time and in my thought process depending on driving style and I've noticed the problem is exacerbated by letting it go a longer interval. Oil analysis haven't really indicated any issue with wear metals or anything but i wonder what other impacts it may have on anything the oil touches like seals, etc as in relation to our discussion now. Gas/ethanol blends being on materials/places that it shouldn't can and does have a corrosive effect.

If you are already doing it i'd say sleep easy sir! You should be able to beat on your car for years to come :)
 

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I agree, stick to your regular synthetic oil. I would be surprised if you ever have to use high mileage oil on a Honda. Plus I will never use high mileage again on any of my vehicles. I used high mileage on my Isuzu rodeo and it caused it to start leaking oil at damn near every seal. It was totally fine before, it never even burned oil. I don’t know what that high mileage had in it but I had to get rid of it after that because it just kept leaking oil.
 
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Swordfish

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I agree, stick to your regular synthetic oil. I would be surprised if you ever have to use high mileage oil on a Honda. Plus I will never use high mileage again on any of my vehicles. I used high mileage on my Isuzu rodeo and it caused it to start leaking oil at damn near every seal. It was totally fine before, it never even burned oil. I don’t know what that high mileage had in it but I had to get rid of it after that because it just kept leaking oil.
It's possible the additives may have removed some slight sludge build up that was keeping it from leaking. I have heard of issues where people put seafoam or some type of additive in the crankcase to "clean out the engine" then wind up getting a bunch of leaks. If the high mileage has more cleaning additives then it may have removed some from the pan.
 

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It's possible the additives may have removed some slight sludge build up that was keeping it from leaking. I have heard of issues where people put seafoam or some type of additive in the crankcase to "clean out the engine" then wind up getting a bunch of leaks. If the high mileage has more cleaning additives then it may have removed some from the pan.
Yeah it probably did. It had 120,000 miles roughly which I only used Castrol GTX and never had a drop leak from that engine. I swapped to Castrol GTX high mileage and a couple oil changes later it started to leak. It was the same weight oil and everything. It was leaking from the oil pan gasket, valve cover gaskets, and once it started leaking from the mains I got rid of it. It was actually a great little truck and hated to see it go. So I learned my lesson on that one.
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