Oil is Oil

  • Thread starter Thread starter Al
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I would opine that up to ~4-5k mile intervals, any API SP synthetic in the appropritate grade will suffice for almost every gasoline fueled vehicle to last ~250k miles easy, with some engines cleaner than others.
Once extended past that interval, there are approvals and licenses that make oils significantly better.
 
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Projectfarm showed supertech 5,000 mile conventional oil to be particularly terrible.
One of the worst volatility tests ever.
Seemed fairly terrible in the cold flow tests, probably the worst 5w-30 oil ever tested.
That guy is ok but his basis is not viewing thousands of UOA. I have done 8 to 10 K miles with Supertech which were fine.
 
That guy is ok but his basis is not viewing thousands of UOA. I have done 8 to 10 K miles with Supertech which were fine.
There's like 4 levels of supertech.
That supertech 5k is looking pretty bottom of the barrel. UOA won't really tell you how much oil burns off or what the cold pour looks like. I'm sure it's fine for 3000 mile oci.
The super tech 85w-140 gear oil goes great in my leaky brush shredder gear box where the name of the game is cheap and thicc. The supertech 10w-30 synthetic 10k oil seems like a fine oil for engines that burn, leak or need a 2nd or 3rd break in oil change or a flush. Especially at $11 a gallon.
 
"Oil is oil" is perhaps the most autoschediastic phrase in all of lubrication, often proffered by those who know little to those who know even less. It's equivalent to saying "steak is steak".
Well ... it depends.

If you have a high performance car and drive like a rabbit on drugs, high revving and putting the pedal to the metal all the time, is a whole different situation, than driving like your own grandpa on a brad & buttern engine that barely sees 2500 rpm ever.

To prove my point, I haven't changed the oil (and filter) in my 2002 Explorer since over 150.000 miles - just some refill now and than with the cheapest no-name oil I can find - and I don't even care about the required viscosity ratings (also I mix them).

According to this forum, my engine should be long dead by now -but it isn't.
On the other hand - I drive like my own grandpa.
 
To prove my point, I haven't changed the oil (and filter) in my 2002 Explorer since over 150.000 miles - just some refill now and than with the cheapest no-name oil I can find - and I don't even care about the required viscosity ratings (also I mix them).

According to this forum, my engine should be long dead by now -but it isn't.
On the other hand - I drive like my own grandpa.
What will most likely cause the demise is the oil filter not being changed for 150K miles. If it comes apart due to clogging, snd media goes into the engine, it could starve something of oil. What brand of filter?
 
Sorry I did not realize I had posted this. You used to be able to look up your previous posts in your profile..I don't think that exists.

Astro you are more than welcome to close this thread..sorry.
Well if you can’t remember posting the exact same thread, with the exact same title, with over 200 posts we have other problems to worry about…
 
Sorry I did not realize I had posted this. You used to be able to look up your previous posts in your profile..I don't think that exists.

Astro you are more than welcome to close this thread..sorry.
I closed the other one, since this is the same topic, let’s leave this one open, so that the points already made remain visible to those wishing to make a post.
 
What will most likely cause the demise is the oil filter not being changed for 150K miles. If it comes apart due to clogging, snd media goes into the engine, it could starve something of oil. What brand of filter?
To be honest - I have no idea.
I don't really care about filter brands. But since everything is still working fine, I assume it's a good brand (and yeah, I know how heretic that sounds).
 
What will most likely cause the demise is the oil filter not being changed for 150K miles. If it comes apart due to clogging, snd media goes into the engine, it could starve something of oil. What brand of filter?
I agree.

I’d imagine the filter is in perpetual bypass at this point.
 
I change my marketing religiously every 5,000 miles. Oil and filter. I’ve been driving for 56 years. I’ve never had an engine failure.
 
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According to LSjr you can't even get a group 1 oil any more, it sounds like he tried to get group 1 base oils and can't, just no one makes them anymore. Which I didn't know and a big part of why "oil is oil" and why "you can't buy a bad oil anymore".
What they call "conventional oil" is at least now all hydro cracked so all those aromatic hydrocarbons that contained a sulfur, phosphorus, nitrogen or oxygen atom and would thermally breakdown, cause, varnish, sludge, rust are virtually all eliminated now.
 
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