AMSOIL Motor Oil Service Interval?

TicketMeRed05GT · May 4, 2005

I have been fairly religious on my vehicles about following the recommended service schedules. I had some time before my Mustang needs its first oil change and decided to do some research.

From the AMSOIL website:
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SERVICE LIFE

In personal cars and light-duty trucks with non-turbocharged gasoline engines: drain oil at 35,000-mile or one-year intervals, whichever comes first.

In turbocharged gasoline engines, motorcycles, ATVs, marine craft and occasionally used gasoline engines: drain oil at intervals up to three times as long as the intervals recommended by the engine manufacturer or one year, whichever comes first.

In high performance and racing engines: drain oil according to the findings of used oil analysis.

In light-duty and nonturbocharged diesel engines: drain oil at intervals up to twice as long as those recommended by the engine manufacturer or six months, whichever comes first.

In fleet and industrial engines: drain oil at intervals up to two times as long as those recommended by the engine manufacturer if the findings of a used oil analysis program support the extended drain intervals.

AMSOIL Oil Filters should be changed at 12,500-mile or six-month intervals (whichever comes first) in gasoline engines. Non-AMSOIL oil filters should be changed at the engine manufacturer's recommended filter change intervals.
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Does anyone have any real world experience with this "35,000" mile service interval!?

Thanks,
TicketMeRed

TicketMeRed05GT · May 4, 2005

It's funny to me that we would have 19 posted replies concerning the vapor trap removal....for what .01 hp diff if that? Seems silly.

The AMSOIL claim is 35K oil changes using their oil. That is something worth looking into. I find it hard to believe, therefore I am soliciting any experience with the oil. I guess no one uses the stuff.....therefore no replies.

TicketMeRed

Szlachcic · May 4, 2005

TicketMeRed05GT said:
It's funny to me that we would have 19 posted replies concerning the vapor trap removal....for what .01 hp diff if that? Seems silly.

The AMSOIL claim is 35K oil changes using their oil. That is something worth looking into. I find it hard to believe, therefore I am soliciting any experience with the oil. I guess no one uses the stuff.....therefore no replies.

TicketMeRed

Be patient for someone that knows. The vapor trap removal thread had 19 replies after 606 views. This thread only has 31 views so far, so it might take some time before you get some repies. I too would be curious if the 35k oil change claim is true.

TicketMeRed05GT · May 4, 2005

Patience. I guess 30 or so people interested in the AMSOIL product might not hit one with any experience. True statement. I'll tell you this; not changing my oil but once every 35k gets my attention. I'll keep waiting.

Thanks for the comment. Any is better than none.

TicketMeRed

amorak · May 5, 2005

I'll tell you what - While not completely convinced, I don't take huge issue with AMSOIL's claim that their oils won't break down in that period of time. However, what I do take issue with is the following

Something in the oils properties has to have been changed to allow for sure a long length of time before thermal breakdown occurs in the oil. I am/would be concerned that this is done at the expense of the lubricating efficiency of the oil.
While the oil may not have broken down, there are many chances for crap to get in the oil.. Sure the oil may not have broken down in 35k, but it'll be hella dirty! I don't want that ***** in my car

My $.02 + GST

05SatinSilver · May 5, 2005

I will be going to Amsoil full synth soon. Although they claim 35,000, notice the oil filter is only 12,500. For the low cost of oil, I won't be waiting that long between oil changes. I 'may' go 7500, but that's about the longest I'll go. It's not worth the risk. Do you think if you go along time between changes and something breaks on your motor, Amsoil is going to cover your repair cost NO, so I'm not willing to take any risk and I'll just do the oil changes myself. Keep all receipts when buying your own oil, just in case something does happen. Ford will want proof that you kept-up with your maintenance. Just writing it down in your owners manual is not good enough!

Dave...

LiteGT · May 5, 2005

My last car was an Acura RSX Type S and I used Amsoil in it. Changed the oil and filter every 25k....no problems. The car had 60k on it when I traded it in and still ran like a champ!! That's only 2 oil changes Of course, it could be in a junkyard right now but I doubt it.

LiteGT · May 5, 2005

This too from an AMSOIL site. The engine flush part especially caught my eye.

Recommendations for Use:
Unless you're going to use the HP 20w50 in a motorcycle or ATV engine, an engine flush is recommended for any vehicle that has used petroleum oil for the past 15 to 20,000 miles or more. This will help clean out any sludge and deposits that may be in the engine, giving you a fresh start for your new premium synthetic oil.

Any filter can be used with AMSOIL 20w50 synthetic oil, but oil filters not designed for extended change intervals should be changed every 3 to 4 months or every 5,000 miles (whichever comes first). The oil will still be good for the full 25,000 miles.

At each filter change you'll need to top off the system with oil. So, consider not only the cost of the filter, but also the cost of the oil you'll have to replace which is lost at each filter change.

To acheive optimum protection of your engine and easier maintenance, use a high efficiency full flow oil filter or bypass oil filtration system along with your AMSOIL 20w50 synthetic oil. These filters remove far more contaminants and last far longer than conventional oil filters.

mobydickdog · May 5, 2005

When I grew up we had 8 people in our family. We didn't change the bathwater until after the 3rd person was finished with their bath. The 4th person would then filter the water with used panty hose and take his/her bath. Then the 7th person did the same as the 4th. We then had the crud (you know the ring that forms around the top of the water) tested.

Now as far as oil and filters goes..................

Dotanukie · May 5, 2005

Check out what this guy has to say, makes for some interesting reading even if you don't agree with it. He pretty much claims the industry standard 3000 mile change interval is a sham.

motor oil bible

I use Mobil 1 religiously, and I usually let my cars go about 5-7K between changes while using a good quality filter, never a problem. Usually in the summer, when it's sometimes dusty, I'll change the filter alone halfway through, just to be safe. I don't know if I'd ever be comfortable with a 25K or greater change interval though, even if I had the test data in hand and pictures of the interior of the engine. For what an oil change costs it's cheap insurance. Sure, I'm lazy, I'd love to only have to change the oil a fraction as much as the norm, but I get that already by going to the 5-7K interval. I'm changing it half as much and I'm not pushing the bounds of what the oil can tolerate.

mobydickdog · May 5, 2005

I use good old fashion 10W-30 oil. I change the oil and filter every 3000 miles. It costs me on average $8.00 to do it. It also gets me underneath the car and underneath the hood to check for other items that might be going hay wire.

So........

3000 miles.......................$8.00
6000 miles.......................$16.00
9000 miles.......................$24.00
12000 miles......................$32.00
15000 miles......................$40.00

mpentico · May 5, 2005

I am currently running AMSOIL.

It has a 25K mile or 1 year drain interval.

Now I estimate putting about 14K miles on my stang this year.
(I've put 8K on it since December 8th 2004)

I changed out the AMSOIL filter @ 7K miles.

I'll change out the oil and filter @ 14K or thereabouts.

At that time I will take a hot oil sample and have it analyized.
I too am interested in how much the oil has held up over time and milage and my driving habits.

I'll post the results.

Dotanukie · May 5, 2005

At that time I will take a hot oil sample and have it analyized.

That would be great of you could post the results, Id' love to see that. I used to be able to get that done for free when I worked for Mobil. In fact, if you happened to own the same model car that they were using for their long term testing (usually a Taurus) you could get the oil changes for free also. A guy who worked in my lab used to do it, he'd bring his car over to the testing bay on his lunch and they would change the oil and filter and run the analysis, then he'd get a report with the test results, very cool. The only stipulation was that if anything happened and you needed to top off the oil they had to do it, so they could monitor what type was added and how much. You also had to keep some minor records and logs and stuff but nothing to taxing, it was worth the free oil changes and testing. They were basically using your car as a testbed for collecting everyday driving data.

Wiredawg1 · May 6, 2005

Just my experience.. Please don't beat on me gents.

I am a Longtime Amsoil user, and I can say with concrete certainty that these guys make a product that does what it claims. I change at 1 yr intervals with 6 month filter changes and have had absolutely no problems as of yet. On two seperate occasions I had the oils in both of my vehicles tested and all tests came back saying that the oils were ok for continued service. I usually put less than 15k miles on my rides each year so that may not seem like a big deal, however 90% of my driving is done in city traffic. Also my truck has a limited slip differential that was having some issues with chatter And after 3 trips to the dealership and 2 different lubes tried, I switched to Amsoil 75W140 and their slip-lock additive, and my problem is gone. The dealership mechanics are at a loss. It's refreshing dealing with a company that their products actually do what they promise. Not to mention I spend a lot less time emptying oil drain pans. I love the stuff

TicketMeRed05GT · May 6, 2005

I have a friend that posted the same question on the Vette forums (cough) and they provided a link to an article that (to me) does a tremendous job tracking the Amsoil product and Mobil 1. All I can say is read the write up for both and decide for yourself. The biggest drawback on either was the that the Amsoil product increased its relative weight, increasing with more miles. Not good. After the article, I decided on Mobil 1, but thats just my opinion.

Enjoy,
TicketMeRed

http://forums.corvetteforum.com/showthread.php?t=1081870&forum_id=48

AMSOIL Motor Oil Service Interval?

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