Oil change with 53% life?
Legacy TMS Member
Joined: September 6, 2011
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From: Kansas City, MO
Hey OP, I'm one of those guys that changes it every 3k... I'm also one of those guys that has never had a mechanical malignity in any of my vehicles. Take all of this with a grain of salt, and ask yourself if the $25 in oil and filters is going to break your bank this month.
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Joined: December 14, 2007
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From: State of Jefferson Mountains USA
Hey OP, I'm one of those guys that changes it every 3k... I'm also one of those guys that has never had a mechanical malignity in any of my vehicles. Take all of this with a grain of salt, and ask yourself if the $25 in oil and filters is going to break your bank this month.
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Joined: December 14, 2007
Posts: 19,953
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From: State of Jefferson Mountains USA
Thanx for the invite. 
Don't tell me... "done a lot of research" means bobistheoilguy right? 
Sooner or later, most threads use that as their "research".
I'm not going to knock amsoil or any other. But I'm certainly not buying your dis against Motorcraft and the recommendations put forth by Ford in the OM. If you don't trust their oil why the hell would you trust their $30,40,50k+ vehicles??
However, here's some comments about amsoil from a link from "bob" that did an "in the field" test with samples regularly sent to Blackstone Labs. Sadly the link has gone dead with the Great Implosion, but I had posted some of it previously in other TMS threads.
As always, you do it how you want, I'll do it how I want - and I trust Ford's recommendations for their vehicles.
~~~~~~~~~~~~~~~
I followed your links and bob's links to the "in the field" oil test. While Amsoil holds up well, doesn't it bother you that its viscosity thickens so much? If I remember correctly, by 10000 miles the test showed its 5w-30 was up to a 15w-40 or 50.
That's pretty thick for cold starts.
Wha?? Didn't you read it? I followed your links to links. Or did you simply repeat manufacturers claims??
Stellar? You can spin it how you want. Going from 5w to 40/50 is a heck of a lot more than "slightly". Heck gear oil prob holds up a long while too - but does it reach the upper cylinder and does it lube in cold weather & cold starts? No.
What is amsoil's explanation for turning from 5w-30 to sludge??
An OHC mutli valve needs lube up top - esp on cold starts. Like Colin Chapman says "what happens above the cylinder is more important than what happens below". Need to protect those parts because they are providing the superior performance over a pushrod.
And again, they admit the test is skewed because amsoil was used after Mobil 1 was used for engine break in. Let's see the reverse. Plus they noted how much smoother the engine ran when they switched out of amsoil and back to Mobil 1.
And 17% decreased mileage from amsoil thickening is HUGE. I get 23 all aorund mileage (and 27 on straight highway). 17% drops me from 23 to 19. Suckville.
Regardless I don't care about extended life with synth or amsoil. Fact remains that all internal combustion engines have blow by. Smell what is caught in your oil seps. I'm not going to run 10k+ miles and keep recycling that blow by just because a synth manufacturer says the lube factor is still good. I want those contaminents out of my engine.
Each their own...
There are many threads about oil. I've read a few so far, and after a bunch of research I am finding that the Motorcraft 5W50 shears down to a 40-weight oil soon after being put into service and the Amsoil 10W40 is actually a freer-flowing oil in cold temps than the 5w Motorcraft.
All that, plus the higher supposed quality of the Amsoil made me make my decision to try their 10W40.
I've seen several used-oil tests and the Motorcraft did not impress at all in any of them, while Amsoil was quite impressive with their 10W40
All that, plus the higher supposed quality of the Amsoil made me make my decision to try their 10W40.
I've seen several used-oil tests and the Motorcraft did not impress at all in any of them, while Amsoil was quite impressive with their 10W40
Sooner or later, most threads use that as their "research".I'm not going to knock amsoil or any other. But I'm certainly not buying your dis against Motorcraft and the recommendations put forth by Ford in the OM. If you don't trust their oil why the hell would you trust their $30,40,50k+ vehicles??
However, here's some comments about amsoil from a link from "bob" that did an "in the field" test with samples regularly sent to Blackstone Labs. Sadly the link has gone dead with the Great Implosion, but I had posted some of it previously in other TMS threads.
As always, you do it how you want, I'll do it how I want - and I trust Ford's recommendations for their vehicles.
~~~~~~~~~~~~~~~
I followed your links and bob's links to the "in the field" oil test. While Amsoil holds up well, doesn't it bother you that its viscosity thickens so much? If I remember correctly, by 10000 miles the test showed its 5w-30 was up to a 15w-40 or 50.
That's pretty thick for cold starts.
*Amsoil is holding its own, except for viscosity. We've noted about about a 17% drop in fuel economy
*if only viscosity weren't so high! This stuff, which says 5W30 on the bottle, is now a middle 40 and is oozing its way toward 50! Bad news for engines that prefer thinner oil. Any connection to the fuel economy drop?
*Amsoil can last much longer than we initially thought possible. That is provided, of course, that you have no problem with the oil thickening way out of grade (many people don't, which is why we continued the test despite our own reservations about it now being a solid 40-weight oil).
*The main thing that stands out on this, our final Amsoil sample, is the ridiculous viscosity. This 5W30 oil has now thickened out to a 15W40 -- argue whether it matters if you like, but we believe engine builders spec an oil for a reason, and this oil is far, far thicker now than intended for the LS1. Switching to our flush Mobil 1 netted a nearly instant 10% improvement in fuel economy, and the engine runs a heckuva lot smoother too. To Amsoil's credit, wear metals remain in check, but we will soon see whether that was really thanks to the oil or just to engine break-in. We'll start posting detailed analysis in the coming weeks.
*Next up: is it true that Mobil 1 was handicapped by an engine still breaking in? We find out!
http://neptune.spacebears.com/cars/stories/amsoil.html
*if only viscosity weren't so high! This stuff, which says 5W30 on the bottle, is now a middle 40 and is oozing its way toward 50! Bad news for engines that prefer thinner oil. Any connection to the fuel economy drop?
*Amsoil can last much longer than we initially thought possible. That is provided, of course, that you have no problem with the oil thickening way out of grade (many people don't, which is why we continued the test despite our own reservations about it now being a solid 40-weight oil).
*The main thing that stands out on this, our final Amsoil sample, is the ridiculous viscosity. This 5W30 oil has now thickened out to a 15W40 -- argue whether it matters if you like, but we believe engine builders spec an oil for a reason, and this oil is far, far thicker now than intended for the LS1. Switching to our flush Mobil 1 netted a nearly instant 10% improvement in fuel economy, and the engine runs a heckuva lot smoother too. To Amsoil's credit, wear metals remain in check, but we will soon see whether that was really thanks to the oil or just to engine break-in. We'll start posting detailed analysis in the coming weeks.
*Next up: is it true that Mobil 1 was handicapped by an engine still breaking in? We find out!
http://neptune.spacebears.com/cars/stories/amsoil.html
Originally Posted by Everett
That comparison was a great find.
And from what I read the Amsoil performed stellar other than slightly thickening It still had life left. And from what I read it performed light years better than mobil 1.
That comparison was a great find.
And from what I read the Amsoil performed stellar other than slightly thickening It still had life left. And from what I read it performed light years better than mobil 1.
Stellar? You can spin it how you want. Going from 5w to 40/50 is a heck of a lot more than "slightly". Heck gear oil prob holds up a long while too - but does it reach the upper cylinder and does it lube in cold weather & cold starts? No.
What is amsoil's explanation for turning from 5w-30 to sludge??
An OHC mutli valve needs lube up top - esp on cold starts. Like Colin Chapman says "what happens above the cylinder is more important than what happens below". Need to protect those parts because they are providing the superior performance over a pushrod.
And again, they admit the test is skewed because amsoil was used after Mobil 1 was used for engine break in. Let's see the reverse. Plus they noted how much smoother the engine ran when they switched out of amsoil and back to Mobil 1.
And 17% decreased mileage from amsoil thickening is HUGE. I get 23 all aorund mileage (and 27 on straight highway). 17% drops me from 23 to 19. Suckville.
Regardless I don't care about extended life with synth or amsoil. Fact remains that all internal combustion engines have blow by. Smell what is caught in your oil seps. I'm not going to run 10k+ miles and keep recycling that blow by just because a synth manufacturer says the lube factor is still good. I want those contaminents out of my engine.
Each their own...
GT Member
Joined: April 2, 2012
Posts: 179
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From: Oregon
Hey OP, I'm one of those guys that changes it every 3k... I'm also one of those guys that has never had a mechanical malignity in any of my vehicles. Take all of this with a grain of salt, and ask yourself if the $25 in oil and filters is going to break your bank this month.
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Joined: August 7, 2011
Posts: 5,246
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From: NC
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Joined: December 4, 2011
Posts: 1,418
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From: Central Florida
Ford increased the oil pan capacity to 6 quarts, allowing for 10K intervals between oil changes, using their recommended semi-synthetic. Many folks prefer the "old school" changing of 5 to 6K intervals, using semi or full synthetic.
Here's the good news for you: if you go by Ford's recommended 10K interval using semi synthetic, you will not have any engine warranty issues pertaining to oil. This of course does not include engine modifications, or driving in harsh conditions.
It's simple; follow the owners manual and you'll be fine according to Ford. And for gods sake, don't suggest using any other viscosity other than 5w-20!
Here's the good news for you: if you go by Ford's recommended 10K interval using semi synthetic, you will not have any engine warranty issues pertaining to oil. This of course does not include engine modifications, or driving in harsh conditions.
It's simple; follow the owners manual and you'll be fine according to Ford. And for gods sake, don't suggest using any other viscosity other than 5w-20!
Last edited by Bucko; Dec 10, 2012 at 05:41 AM.
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Posts: 1,418
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From: Central Florida
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