Synthetic Oil Change Advice
#21
04-15-2012, 11:12 AM
It's more than just a myth, bought a vehicle a few years back, owner had just done a Dino oil change, so I switched it at 3,000 to a Mobil one full synthetic, and gained leaks. Valve covers, rear main, and timing cover. If there were no leaks before, then why all the sudden leaks after I switched? You can't call it 100% yes or no with that, seems like it depends in the motor and how good the seals are
That's why I use high mileage part synthetics (they have chemicals in there that are supposed keep old oil seals from leaking) because I've heard all kinds of stories about oil seals leaking after switching to full synthetics.
BTW: it looks like professor hydra is on a roll today
#22
04-15-2012, 12:05 PM
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Such a touchy subject. LOL. Here is something to keep in mind when deciding how often to change... Who is telling us to change every 3k miles? ... It's the oil companies. The frequency of our oil changes directly impacts that division's revenue. The oil industry is a volume business, not straight margins. How do they accomplish this? Fear. It's Marketing 101, folks.
#23
04-15-2012, 12:14 PM
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Ok, well considering my D does not sit around, since it is used roughly once a day to drive around town, with a rare appearance quickly on the highway, I should probably go with the 1 year interval on my Mobile 1 Extended Mileage Synthetic Oil? Since at the 6 month mark I have only reached 4,000 miles, I will probably hit the 8,000 mileage mark within that 1 year as well.
Last edited by Ohio Mossy Oak; 04-15-2012 at 12:36 PM.
#24
04-15-2012, 07:05 PM
#25
04-17-2012, 11:10 PM
Hall Of Fame
Using an oil like Mobil 1 Extended Performance, which is rated for 15,000 mile oil changes then changing it every 3000 is pointless, unless you have issues or something. I change mine every 10k with no problems. The new Porsche's say 12k mile oil change interval. And thats in a high performance engine. 3000k miles is WAY outdated. BTW I switched to synthetics with 200k miles on the clock and had no problems. No leaks. Nothing. The "Dont use Synthetic in high mileage vehicles" theory is a myth to. If you already have leaks with regular Dino oil, your gonna have leaks with synthetics.
The reason Porsche states to use 12k intervals is because they are using European Fully Synthetic oils, not what you are buying here in the USA. Yes, there are 2 different type blends, and in that I mean Fully Synthetic blends. And it is not a new thing, it's been around for a while.
The other reason that they can go a longer interval is because they use different weights of lubricants then what we use. Different weights have different properties and searing factors.
Further they have a lot closer tolerances in the build of their motors then we do. For instance a main bearing journal, here in the USA on lets say a Ford might be .006 variance, yet their motor is closer to .002 tolerance, with in detail needs the use of lighter oil and less ware accumulated. Then you add in the metal being used, which is different then here.
See there is a heck of a lot of differences in your "simple explanation", but when you actually take a closer look at things, well there is a lot more going on behind the curtains.
In fact I believe the new BMW's over there are rated up to 12K or 15K, but again, they are 2 TOTALLY different things then what you have here.
But as for a notion that a blend can go longer in change intervals over a true Polly Base is just nonsense, a blend is "blended" with Fully Synthetic and base oils, and this basically creates an oil that should be better then Conventional, yet not as good as Fully Synthetic (Polly). Yet the generic idea is nothing but a sales pitch, and I say this respectfully. See the difference is in the base, one is processed more then the other, so to take a lower processed base and mix it with a high processed base you end up with medium-low base. The reason I say medium low base, instead of medium, is because the process is just sooooo much inferior to make a Polly base (High). Then to actually contaminate the pure Polly base with a conventional, well that is just plain stupid! Not only that, but at which percentage are they "Blending". See it's nothing but a sales pitch.
It's really a no brainer! You are simply wasting money on the 15k High Mileage Extended Performance. The only thing you get with an High Mileage is slightly better viscosity improver, and slightly better seal improver, but I mean slightly. Other then that it's nothing.
Now I use Mobil One Fully Synthetic High Mileage 10W-30. The reason I use the High Mileage version is I have seen less vaporization and better hot end performance because of blow buy from warn rings. I tow with my trucks (severe duty) and that is why I use it, besides it does have a bit better seal revitalize properties. I still change my oil out every 5K, and it is darkened when I do. I know for a fact (because I have done the testing personally) that my engine is covered.
If your manual states 3k intervals, then you can step it up to 5k intervals, but the same contamination warnings apply if contaminated with the use of Mobil One FS 10W-30 or Mobil One FS 5W-30. If your manual states every 5k for your driving style then you can step it up to 7500 mile intervals, again contamination rules still apply. The reson for this is again because of the better and smoother base oil and better blend of improver in the Mobil One Fully Synthetic (FS) over conventional oils.
t's more than just a myth, bought a vehicle a few years back, owner had just done a Dino oil change, so I switched it at 3,000 to a Mobil one full synthetic, and gained leaks. Valve covers, rear main, and timing cover. If there were no leaks before, then why all the sudden leaks after I switched? You can't call it 100% yes or no with that, seems like it depends in the motor and how good the seals are
#26
04-18-2012, 12:33 AM
There ya go thinkin again......
The reason Porsche states to use 12k intervals is because they are using European Fully Synthetic oils, not what you are buying here in the USA. Yes, there are 2 different type blends, and in that I mean Fully Synthetic blends. And it is not a new thing, it's been around for a while.
The other reason that they can go a longer interval is because they use different weights of lubricants then what we use. Different weights have different properties and searing factors.
Further they have a lot closer tolerances in the build of their motors then we do. For instance a main bearing journal, here in the USA on lets say a Ford might be .006 variance, yet their motor is closer to .002 tolerance, with in detail needs the use of lighter oil and less ware accumulated. Then you add in the metal being used, which is different then here.
See there is a heck of a lot of differences in your "simple explanation", but when you actually take a closer look at things, well there is a lot more going on behind the curtains.
In fact I believe the new BMW's over there are rated up to 12K or 15K, but again, they are 2 TOTALLY different things then what you have here.
But as for a notion that a blend can go longer in change intervals over a true Polly Base is just nonsense, a blend is "blended" with Fully Synthetic and base oils, and this basically creates an oil that should be better then Conventional, yet not as good as Fully Synthetic (Polly). Yet the generic idea is nothing but a sales pitch, and I say this respectfully. See the difference is in the base, one is processed more then the other, so to take a lower processed base and mix it with a high processed base you end up with medium-low base. The reason I say medium low base, instead of medium, is because the process is just sooooo much inferior to make a Polly base (High). Then to actually contaminate the pure Polly base with a conventional, well that is just plain stupid! Not only that, but at which percentage are they "Blending". See it's nothing but a sales pitch.
It's really a no brainer! You are simply wasting money on the 15k High Mileage Extended Performance. The only thing you get with an High Mileage is slightly better viscosity improver, and slightly better seal improver, but I mean slightly. Other then that it's nothing.
Now I use Mobil One Fully Synthetic High Mileage 10W-30. The reason I use the High Mileage version is I have seen less vaporization and better hot end performance because of blow buy from warn rings. I tow with my trucks (severe duty) and that is why I use it, besides it does have a bit better seal revitalize properties. I still change my oil out every 5K, and it is darkened when I do. I know for a fact (because I have done the testing personally) that my engine is covered.
If your manual states 3k intervals, then you can step it up to 5k intervals, but the same contamination warnings apply if contaminated with the use of Mobil One FS 10W-30 or Mobil One FS 5W-30. If your manual states every 5k for your driving style then you can step it up to 7500 mile intervals, again contamination rules still apply. The reson for this is again because of the better and smoother base oil and better blend of improver in the Mobil One Fully Synthetic (FS) over conventional oils.
Mike is right for the most part, it depends on what you have. Also know that seal for older type engines use all sorts of things like certain silicone, cork, and even leather. These gasket materials cannot hold up the the detergents in Fully Synthetics and the lubricate will actually cause the gasket to fail. In the newer cars, well they are built with new gaskets able to withstand the Fully Synthetic lubricants. Now in Mikes case, the motor could have been an older build, or maybe a newer engine with cheap gaskets, basically a rebuild but with skimped on gaskets materials that could not handle the detergents and leaked, whatever the reason is.
The reason Porsche states to use 12k intervals is because they are using European Fully Synthetic oils, not what you are buying here in the USA. Yes, there are 2 different type blends, and in that I mean Fully Synthetic blends. And it is not a new thing, it's been around for a while.
The other reason that they can go a longer interval is because they use different weights of lubricants then what we use. Different weights have different properties and searing factors.
Further they have a lot closer tolerances in the build of their motors then we do. For instance a main bearing journal, here in the USA on lets say a Ford might be .006 variance, yet their motor is closer to .002 tolerance, with in detail needs the use of lighter oil and less ware accumulated. Then you add in the metal being used, which is different then here.
See there is a heck of a lot of differences in your "simple explanation", but when you actually take a closer look at things, well there is a lot more going on behind the curtains.
In fact I believe the new BMW's over there are rated up to 12K or 15K, but again, they are 2 TOTALLY different things then what you have here.
But as for a notion that a blend can go longer in change intervals over a true Polly Base is just nonsense, a blend is "blended" with Fully Synthetic and base oils, and this basically creates an oil that should be better then Conventional, yet not as good as Fully Synthetic (Polly). Yet the generic idea is nothing but a sales pitch, and I say this respectfully. See the difference is in the base, one is processed more then the other, so to take a lower processed base and mix it with a high processed base you end up with medium-low base. The reason I say medium low base, instead of medium, is because the process is just sooooo much inferior to make a Polly base (High). Then to actually contaminate the pure Polly base with a conventional, well that is just plain stupid! Not only that, but at which percentage are they "Blending". See it's nothing but a sales pitch.
It's really a no brainer! You are simply wasting money on the 15k High Mileage Extended Performance. The only thing you get with an High Mileage is slightly better viscosity improver, and slightly better seal improver, but I mean slightly. Other then that it's nothing.
Now I use Mobil One Fully Synthetic High Mileage 10W-30. The reason I use the High Mileage version is I have seen less vaporization and better hot end performance because of blow buy from warn rings. I tow with my trucks (severe duty) and that is why I use it, besides it does have a bit better seal revitalize properties. I still change my oil out every 5K, and it is darkened when I do. I know for a fact (because I have done the testing personally) that my engine is covered.
If your manual states 3k intervals, then you can step it up to 5k intervals, but the same contamination warnings apply if contaminated with the use of Mobil One FS 10W-30 or Mobil One FS 5W-30. If your manual states every 5k for your driving style then you can step it up to 7500 mile intervals, again contamination rules still apply. The reson for this is again because of the better and smoother base oil and better blend of improver in the Mobil One Fully Synthetic (FS) over conventional oils.
Mike is right for the most part, it depends on what you have. Also know that seal for older type engines use all sorts of things like certain silicone, cork, and even leather. These gasket materials cannot hold up the the detergents in Fully Synthetics and the lubricate will actually cause the gasket to fail. In the newer cars, well they are built with new gaskets able to withstand the Fully Synthetic lubricants. Now in Mikes case, the motor could have been an older build, or maybe a newer engine with cheap gaskets, basically a rebuild but with skimped on gaskets materials that could not handle the detergents and leaked, whatever the reason is.
Just an old motor haha
Hydra is right with this oil talk, and I'm damn glad I have read that explanation of oil a couple times now
#27
04-18-2012, 06:11 PM
Hall Of Fame
LOL
Throughout the years here I have posted up many threads regarding lubricant issues, however there is still a lot of scepticism and miss information out there, not to mention a lot of biased as well as uneducated guessing. I have posted up MANY things to correct people or just explain issues that arise during everyday talk, nice to see some people pay attention!.....
Opinions are great if backed with solid information.
Throughout the years here I have posted up many threads regarding lubricant issues, however there is still a lot of scepticism and miss information out there, not to mention a lot of biased as well as uneducated guessing. I have posted up MANY things to correct people or just explain issues that arise during everyday talk, nice to see some people pay attention!.....
Opinions are great if backed with solid information.
#28
04-18-2012, 11:58 PM
#29
04-19-2012, 12:34 AM
#30
04-19-2012, 09:03 AM
THE ULTI-MOD