High Milage verus plain Dino and Syn Blends

[Doc Holiday]

ok....I've never considered using a HM oil until I read so much about them on this site. My question...Which is better for everyday driving. HM or plain dino/syn blends>? I know this doesn't address what kind of motor etc. But just as Full Syn (group 4 anyway) is best...which of these would be best? Thoughts Please....and let the wars begin.

 

[Brogy]

A high mileage is a syn-blend, but maybe a little thicker, and it has additives to supposedly swell rings and stop consumption but i've never noticed decreased consumption using it.

I'd say a syn blend would be the best, then high mileage, then dino.

 

[TallPaul]

I prefer HM because some brands HM do not bow to the energy conserving criteria and so can have a more robust base oil. So in that respect I would take HM over conventional or blend. Want a blend, mix a quart of PAO into your HM oil. Actually, I believe the new labeling for Maxlife will call it a blend since it has 12-22% PAO already in it.

 

[ziggy]

This is not so easy to answer, for me anyways... High mileage oils are thicker, like 5w 30 HM are very close, to bordering 5w 40 oil. But they have much less pour an falsh points. Blends, are the same thing as regualr dinos, better flash and pour points than HM oils, but only a few, like mobil 7500, have a pour point of about -44 degress, vs, -33 for the rest. If i wee you, ide use the HM in humid sunbaking summer months, adn a blend in winter months

 

[Merkava_4]

ziggy, which browser are you using?

 

[hominid7]

Just tonight i was looking at my local walmart at the various oils. One thing i noticed was that while none of the high mileage oils were 'energy conserving' one that i found did carry the "SM" rating. That one being Castrol HM oil.

I've never used a HM oil, at least not one labeled as high mileage. My car is a 2001 so it has seen some SL oil. If my car started using a noticable amount of oil i may try the HM oils, but until then, i prefer regular SM oils.

If a thicker oil is what you want, try stepping up a level in viscosity. Regular dino 10w30/10w40 is likely going to be cheaper than HM 5w30. While i dont see anything wrong with the HM oils, and some with worn engines may benefit from them, but for the masses they seem to be designed more for profit than actual purpose.

 

[Merkava_4]

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A high mileage is a syn-blend, but maybe a little thicker

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Ok if Durablend has 30% Group III, how much Group III does HM Castrol have?

 

[TallPaul]

I don't think all HM are synthetic blends. In fact, I only know for sure that Maxlife is.

 

[jorton]

Good HM's are Maxlife, Castrol and Pennzoil.

I have read oil reports for Chevron and Havoline regular conventional and HM oil. The HM showed more wear.

 

[TeeDub]

I prefer a Group III synthetic to a high mileage oil, the latter of which typically have very little synthetic content. The Group III's seem to do fine in older engines that have previously used petroleum oils and they don't clean as aggressively as PAO/Ester synthetics. So you are less likely to generate leaks by cleaning up previously formed deposits.

The HM stuff is mainly marketing, as all oils contain seal swell additives, detergents, etc....

TD

 

[Doc Holiday]

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Just tonight i was looking at my local walmart at the various oils. One thing i noticed was that while none of the high mileage oils were 'energy conserving' one that i found did carry the "SM" rating. That one being Castrol HM oil.

I've never used a HM oil, at least not one labeled as high mileage. My car is a 2001 so it has seen some SL oil. If my car started using a noticable amount of oil i may try the HM oils, but until then, i prefer regular SM oils.

If a thicker oil is what you want, try stepping up a level in viscosity. Regular dino 10w30/10w40 is likely going to be cheaper than HM 5w30. While i dont see anything wrong with the HM oils, and some with worn engines may benefit from them, but for the masses they seem to be designed more for profit than actual purpose.

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Every HM oil I looked at carried the SM rating...includeing Super Tech....But only Max Life said anything about GF-4

 

[Triple_Se7en]

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Every HM oil I looked at carried the SM rating...includeing Super Tech....But only Max Life said anything about GF-4

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Isn't the main mind-frame on switching to a high mileage oil all about correcting an engine issue or multiple issues -- versus that of concerns over GF-3 or GF-4? After-all, most engines of such issues are from the GF-3 heydays anyways -- so the GF shoe already fits the engine.

 

[Merkava_4]

I'm thinking that if Maxlife is the only HM oil with 20% Group IV added to it, the others (Castrol, Pennzoil, etc) might not be worth the added cost.

 

[hominid7]

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Every HM oil I looked at carried the SM rating...includeing Super Tech....But only Max Life said anything about GF-4

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I very well may have been looking at old stock.

 

[Doc Holiday]

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Quote:

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Every HM oil I looked at carried the SM rating...includeing Super Tech....But only Max Life said anything about GF-4

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Isn't the main mind-frame on switching to a high mileage oil all about correcting an engine issue or multiple issues -- versus that of concerns over GF-3 or GF-4? After-all, most engines of such issues are from the GF-3 heydays anyways -- so the GF shoe already fits the engine.

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This is how I felt also until reading so much on here....why wouldn't you want a motor oil that is more robust. The more I look...the better this oil looks...it looks like its made for the motor not the EPA and CAFE.