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Guest Message by DevFuse
 

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Just saw an ad for 15,000 mile oil


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8 replies to this topic

#1 Alex C

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Posted 20 February 2005 - 10:31 PM

Why? I mean I can see the point, but doesnt that mean all the contaminents stay in your system for that long?


Alex

#2 85Sub4WD

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Posted 20 February 2005 - 11:10 PM

yes

no filter can get everything - most of the most harmful contaminates can pass through ALL available filters because they are physically similar to oil, just chemically different - mainly blowby gasses and acids that come from reactions between the oil and blowby gasses

I do mine every 3000 myself - it's a subaru, it's easy AND cheap

#3 swervey87gl

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Posted 20 February 2005 - 11:42 PM

Pretty much all oil that is made is literaly rated for that long. Because of the contaminates the oil needs to be changed. There is no way to predict how oil will last with different so many different filters. All it is is just a sales pitch.

#4 maximumBRAT

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Posted 21 February 2005 - 12:02 AM

Good question..

#5 hooziewhatsit

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Posted 21 February 2005 - 12:33 AM

I just saw the same ad for Mobile oil.

The oil probably just has more of the 'stuff' that traps contaminates, so it can theoretically go longer before changes. However, more 'stuff' means less actual oil...

#6 85Sub4WD

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Posted 21 February 2005 - 12:43 AM

more 'stuff' means less actual oil...

not necessarily as the oil itself is what does the trapping - the "stuff" added is just added to change its viscosity range, hence why I don't like 10w-40 - too much stuff added. Realize that the more "stuff" trapped in the oil means the less protection the oil is really giving your engine as it is carring all of that "stuff" over, through, and around the bearings and everything else

it's just bad karma ;)

#7 Syrinx

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Posted 21 February 2005 - 09:30 AM

cheap oil at regular intervals I believe is always better than fancy oil at long intervals for the reasons stated above.

Oil is Oil is Oil. It is all the same carbon based goo dead dinasours gave us, regardless of the label or additives.

#8 erik litchy

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Posted 21 February 2005 - 10:20 AM

cheap oil at regular intervals I believe is always better than fancy oil at long intervals for the reasons stated above.

Oil is Oil is Oil. It is all the same carbon based goo dead dinasours gave us, regardless of the label or additives.


not if its PAO based stock instead of hydrocracked. imo i would change the oil filters at 3k miles and leave the oil alone.

#9 85Sub4WD

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Posted 21 February 2005 - 10:31 AM

cheap oil at regular intervals I believe is always better than fancy oil at long intervals for the reasons stated above.

Oil is Oil is Oil. It is all the same carbon based goo dead dinasours gave us, regardless of the label or additives.


Yes and no, cheap (Quaker State) oil has had a tendency to build up wax in bad places and spin bearings, and also gell in a bad way. This was mainly due to refining issues - I still don't use Quaker State because I have seen it do some VERY weird stuff if it sits too long in the bottle - even sealed and unopened.

Moderately priced (Castrol/Mobil - not 1) at regular intervals is best. I generally consier anything over $2.50 a quart to be excessive - I usually run Castrol Synthetic Blend b/c I have found it to work really well, and it is reasonably priced.

Regular oil changes are always cheaper than an ocasional engine rebuild.




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