You can run oil longer than 3k pretty easily. My grandfather's 96 Dodge Ram he changed the oil every 10k, this was using napa oil filters and regular napa dino oil. He put over 200,000 miles on it before he sold it with the engine still running strong, he talked to the guy who bought it the other day. Guy said it's the best truck he's ever had, he's got over 260,000 on it now with no troubles whatsoever.

 

Toeach his own...

I left the oil in there for a year, did the oil analysis and everything came back within acceptable tolerances...

Mobil 1 is not a Group IV Synthetic motor oil, it is a Group III (basically a more highly refined motory oil). What did you 'buddy' use before the Mobil 1? How often did he change his oil?Without further information it is hard to say that a one time use of Mobil 1 would cause his engine to 'gunk up'.

 

Ok, I'll put you to work then...

What the hell is Amsoil? Isn't it just a brand name for a synthetic "oil"?

How is your Amsoil different than the others? I haven't paid much attention to syns yet as I haven't used any. But these internals sound a bit much on the mileage. And who's bright idea was it to say it's only good for a year regardless of mileage? Normal use is good to twice the distance and heavy use yet they both crap out at 1yr? Yeah, yeah I know it's a gradual thing and not good one day and worthless the next but the normal should be twice as long. Unless, you have something funky going on with evaporation or some kind of chemical reaction.

 

Amsoil is a brand, there is a lot of reading and information about the company and it's oils on this site: http://www.performanceoiltechnology.com/

 

yeah but lets take a straw poll! who here would leave oil in there car for a year?

 

Mmmm, Warstiener is gooood......

 

Is that a dare??? I go between 5k and 10k on regular oil. I change it when I get around to it. And no that isn't why I'm on engine # 2 in the Sentra!!

My first car was a '72 Duster with the 225 slant 6. It leaked enough oil that I just added instead of changed.

 

Am I allowed to critique my own sig? Warsteiner is good as in ok. Belgian beer is where it's at. Just so happens I'm wearing my Belgian beer t-shirt today. So many beers, so little time.

 

I'm switching to Amsoil 0W-30 soon and I plan to take a sample and have it sent out to an independant lab at the one year mark, if their analysis shows the oil is good to go I'll leave it in there longer.

 

see, what Altair is doing is how comercial fleets do it to test oils. they have someone come out and test the oil in there trucks or equipment then have it sent out to labs to find out how long they can keep it in the engines and which oil provides them with the most cost effective way of running. Im still working on my site to add more info about products but the other site posted provides most of the info.