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Hey guys so ive been seeing more and more articles that it is actually safe to use synthetic coming from regular motor oil; however, I use high mileage motor oil. its the same price as reg oil, so it does not bother me.
But Ive been reading that synthetic is much more better on the engine and prevents sludge build up due to its heat tolerable being much higher
but high mileage has special additives to help keep those seals and rings flexible. im just wondering what is the best option now for those who know A LOT about motor oil
im just wondering if synthetic provide lubrication to those internal seals just like high mileage oil (from what I know)
IMHO, the problem with synthetic oil in high-mileage vehicles is it does clean the sludge out. Any sludge in a high-mileage vehicle may be what's keeping those seals from leaking. If you clean all those seals, you may find oil leaks.
I ran Castrol GTX in a Nissan 3.5L for pretty much it's entire 180K miles. Never felt the need to change to anything "better". I just stayed on top of oil changes and it ran like a top.
not really, though many are semi synthetics, a blend of mineral and synthetic oils.
Quote:
Originally Posted by RyanR
IMHO, the problem with synthetic oil in high-mileage vehicles is it does clean the sludge out. Any sludge in a high-mileage vehicle may be what's keeping those seals from leaking. If you clean all those seals, you may find oil leaks.
1. I am not sure of the latest prices, but usually, switching to synthetic is matter of feasibility. let me explain: synthetic oil runs for much longer without losing its lubricating capability. 10 000 - 25 000 miles. That in mind, one can easily compensate extra expense with less oil changes. Example: I used to do Amsoil 25 000 miles in my cars. I'd change it, depending on a vehicle, every 15-17 000 miles. That is equivalent to 3 conventional oil changes or, 5 for those who believe in 3 000 myth. My oil change will cost me roughly $80 but, in long run, it is less expensive than other oil changes.
2. With that in mind, this is how I look at the question. If your engine is NOT taking or leaking oil in any manner then yes, it is feasible to switch to synthetic. proper way of doing it is to switch to semi synthetic then to full synthetic. Semi will show how engine responds to thiunner, more liquid oil, what synthetics are.
3. If engine does leak or take oil in any manner, it is NOT feasible to switch to synthetic. Too expensive. Problem should either be fixed or, engine should be switched to a heavier weight oil with a bit of Lucas oil additive.
This opinion is based on 12 years of continuous synthetic oil use on various multiple vehicles with engines of various quality. And, basically, most of the conventional oils.
If you're high mileage engine is used to dino oil, do not switch. I find it amazing so many people buy old car with bunch of miles, then switch to synthetic thinking it's better.
If you're high mileage engine is used to dino oil, do not switch. I find it amazing so many people buy old car with bunch of miles, then switch to synthetic thinking it's better.
That's what I would do. At 170,000 miles, it's way past the time to switch to synthetic. I buy new and switch over to synthetic within a few thousand miles.
If you're high mileage engine is used to dino oil, do not switch. I find it amazing so many people buy old car with bunch of miles, then switch to synthetic thinking it's better.
Quote:
Originally Posted by AlaskaErik
That's what I would do. At 170,000 miles, it's way past the time to switch to synthetic. I buy new and switch over to synthetic within a few thousand miles.
you can switch to synthetic ANYTIME during the engines lifetime, mileage does not matter. and there is no issue switching to synthetic, and then switching back again at some point in time.
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