Hi Scotty,
What's your take on high mileage oil?
What makes high mileage oil unique and why should you use it?
What's your preferred engine oil brand?
Thank you!
@ben123
Pretty sure Scotty is a Castrol guy. It is a well respected brand with a lot of technology behind it.
As far as I’m concerned, it’s a quick way of causing your engine to burn oil prematurely.
If you want your engine to last as long as possible with the least amount of wear, change your oil every 3000-5000miles with the manufacturer recommended specification.
Oil is cheap, engines cost a fortune.
If your engine is leaking then it would benefit from the seal swelling additives in high mileage oil. If your engine seems fine but is just high mileage then using this may swell its (already good) seals up to where you have to continue using this type of oil for the life of the engine. Once you go high mileage you don't go back. I am a huge fan of synthetic oil after opening up a few high mileage engines that have only lived on synth.
The main difference is that high mileage oil has seal swelling agents in it in order to prevent leaks in older cars and it also has a more robust additive package in order to protect the internal parts of the engine. This is because the clearances between metal parts in your engine get bigger to due wear.
@alban123
Is it proven that it is better for old engine or it is just an advertisement?
@yaser
He's right about the oil having a special additive package that helps rejuvenate seals that will most definitely be worn out on a high mileage engine. I mean, why else would oil companies go out of their way to create a special oil for high mileage applications? Sure it may cost more, but that's because of those extra additives they include. Oils go through an inspection and approval process; they can't lie about what additives are in the oil.
@alban123
I understand that they add special additives, my point is how effective these oils are for worn engines in real world.
@razmigb
who inspects them ? I don't see the additives listed on the bottle.
@mountainmanjoe
American Petroleum Institute (or API if you didn't know what it stood for), the European Automobile Manufacturers Association (ACEA), and others which I don't remember off the top of my head. How do you think they are rated in the first place? They go through extensive tests to make sure the oil meets specific requirements. Oil brands are not going to state what specific additives they have in the oil. They keep that a secret due to competition in the market. All they mention is what benefits the additives offer for your engine, such as the seal rejuvenation for example. Again, if they stated that their oil rejuvenates seals, they would test that.
@razmigb
If the additives are a secret, then how do we know if they are in the oil or not? Which API test certifies that an oil is for "high mileage" or that it will "rejuvenates seals" ?
@alban123
You're getting WAY too technical on such a simple topic here and asking WAY too many unnecessary questions now. Are you trying to prove a point with me? I already explained what I needed to. I don't work for API or an oil company to know all the specifics on how they test or rate them. If you're having a hard time believing me if oils are tested, go to an oil refinery or watch videos on how they test and rate oils if you're so inclined on this subject matter. It's your choice to believe whether "high mileage" oil is BS or not...
@razmigb
OK. Just wondering what information or marketing you base your conclusion on (if any).
Mobil 1 is the best no question about. whenever it goes on sale buy 2
