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Read our primer articles on High Mileage Oil, Synthetic Oil and Kinematic Viscosity

After hearing many good things about AMSoil, I decided to give it a try.

I just flush and change to their 5W-30 oil & Filter (the 25,000 miles) type.

I have an 03 Infiniti G35.

My question is that, how long should I wait to change my oil, though they said that their oil & filters are good up to 25,000 miles or 1 year?

I drive around 80 miles daily. I'm thinking of changing it every 10K miles? Is it okay or should I change it earlier?

Thanks
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Did you get the Ea air filter as well? If not, you may want to give that some thot. Changing after 10,000 when it claims to have 25,000 depends on your OEM recommendations or the "idiot" light, (Oil Change Indicator Light). If you still have doubts, get an oil analysis but that's hardly cost effective but satisfied my curiosity. I did that with a different product option and it came back, "good for use, no need for change" after 13,000 kms. It's maximum was 12,000 kms or six months.
RH
I use the 5W-30 Amsoil (ASL) in my 2005 Cadillac CTS. I am changing it once a year and expect to put 10,000 miles on it it this year. Last year I only managed to go 7,100 as I drove the truck a lot.

I have been doing yearly oil changes with Amsoil since 1975 and been a dealer since 1978.

But depending on the type of oil you previously used in the car, I would keep an eye on it. Synthetic will clean the inside of the engine like no other and if you start to use oil it could be a sign the oil additives are getting used up. This may mean you need to replace the oil filter sooner or maybe even a change. Once it cleans out any deposits that may be in there, it should stabilize. Sometimes after using fossil oil (some are worse than others) this will occur but not always so don't be alarmed, Just be aware of that.

Personall I think 10,000 miles is a no brainer with that oil and an EaO filter. They don't make an EaO or EaA fitlers for my CTS and say they likely never will, uses a cartridge oil and a custom panel air but I use them in the other vehicles.

I am using Amsoil in my
2005 CTS
2004 GMC 4x4
1993 Lumina (ams XL5W-30 since new)
1992 Chevy 4x4 winter snow plow use
+ in my 2006 Rincon (ATV) and all my small engines like lawnmower, pressure washer, snowblower and leave eater upper.
Last edited by miker
quote:
... get an oil analysis but that's hardly cost effective but satisfied my curiosity. I did that with a different product option and it came back, "good for use, no need for change" after 13,000 kms. It's maximum was 12,000 kms or six months.
RH


I did it for identical purposes with 5W-30 XL (recommended change is 12.000 kms or 6 mths.) oil after 14.000 kms (WV Golf, 1993) and result was the same - "suitable for continued use"!

So, make conclusions for yourself but do not shorten drain interval! That would be just wasting the environment, resources and money!
Since this is the first attempt at extending the drain interval it would be a wise idea to do a short interval of 10,000 miles and also to take a oil sample to determine the integrity of the engine. In industrial applications drain intervals are determined by oil analysis. There truly is no 'one size fits all' for lubricant/engine application recommendations.

The vehicle isn't new but it apparently sees high mileage highway use which is a excellent application for extended drain intervals.

Personally I would dissect the filter at all oil drain intervals to verify integrity of media pleats.
Nkcd, I wouldn't go past the manufacturers recommended interval(7.5k/6 months) without a UOA.
Don't fall for the brand marketing symantecs.

Most synthetics have no problem with a 10k OCI and many manufactures are pushing longer OCI's with oil life monitors and better spec'd fluids.
Nissan hasn't jumped on that bandwagon yet. And, Nissans tend to have small oil sumps when compared to power output and engine size.

Truly, if you want to drive 25k miles without changing the oil, purchase and install a 'bypass oil filter'. Then, use can use ANY synthetic oil and any full flow oil filter.

The biggest problem that I see when people commit to long oil change intervals is keeping the oil level topped off. Remember that using the higher end products is no excuse for not topping the oil off regularly.
I work for a major new heavy equipment dealer in the PM department. Our reccomendations when trying to expend OCI is to do an UOA with NEW unused oil, that way you get a base line, then do a UOA when changing the oil @ normal interval, then extend the OCI by 1K and see what the UOA says, then extend another 1K and se what that UOA says, ETC, until you get to the mark you want, 10K. It does take time, but that way you KNOW what is happening in your engine.
BTW, I UOA all my personal vehicles as it can prevent a major failure by trending the wear elements. Here we charge $10 per sample, a worthwhile invenstment, IMO.
It took being an Amsoil dealer for 3 years to
see what the Amsoil upline dealers were really talking about.

It is now 13 years later ...

And I have personally installed more Amsoil
than anyone in Southern WV.

And ... in these 13 years, I have changed the oil and filters in my 6.2 GM truck 3 times.
And then more to pretty up the oil filters as they are mounted on the outside of the truck on the front bumper. ... than for any other reason.

But ... I routinely support my customers,
my wife's car, my daughter and son's vehicles
all to 25,000 mile and past the one year time limit. All without bypass filtration.

The 1 year time limit is the criteria for Amsoil's Insurance policy to protect against failure.

The Amsoil 0.30 is a 1 year/35,000 mile lubricant that will increase highway fuel mileage nearly 2 miles per gallon.

I did the daughter's 04 Hyundai Sante Fe this morning @ 28,000 miles with the 0.30

The recommendation is to go to 25,000 miles
and evaluate changing or going the additional 10.000. miles with another 25,000 mile filter.

If there is ever any doubt about the condition of the engine lubricant ... it may be hard to justify paying for an oil analysis ...
But removing the oil filter and testing a small sample for acid > with baking soda would and does satisfy me > for concerns of "acid buildup." ... and safe continued use.

@ 25,000 miles, likely the 0.30 may have cooked down to a 5.30 and if this is the worst that happens to it ... then at 25,000 miles I would be tempted to install a new Amsoil 1 year oil filter and keep on going.

That is because of what I believe myself to know by doing so much engine work and Amsoil installation.

Your 5.30 and the 1 year oil filter is fully capable of doing all that Amsoil claims ...
And More.

But what I know, would truly sound farther absurb to those who can not get their arms around even going 15,000 miles distance.

It simply takes experience to know it ...
Experience that is not easily gotten ...

A person can not teach what they do not know.
But I support the Amsoil program whole heartedly ...
With out upline support.
Remove the oil filter.
Use a clean pan to catch the engine oil.
Use a teaspoon and sample some of the engine oil.

Crumble some baking soda in the oil in the spoon.

Watch for Alka Seltzer fizzing.

*******************.
Simple Acid-Base Test.



***********************.

No fizzing > liquid is still base > Non acidic.

Change your filter.
Drive until the time/mileage limit has
become accomplished.

Realize that the Amsoil product failure
Insurance policy depends on your following directions.

And changing with-in months of service or mileage supported by the product.
**********************************.
They will Not honor claims of failed product when it goes past the recommendations.
*****************************************.

However, that is not to say, that an engine
that does not go 3 or 4 thousand miles in a full year's time has even begun to stretch the engineering limits for the 1 year/25,000 mile product.

The sight test.
The smell test.
And
The acid test all work well for an engine oil
that is synthetic that has not been stretched to and beyond it's supported limits.
*************************************.

Adding the 1 micron by-pass filtration system
Coupled with:

Spectra-Analysis every 30,000 miles.
Along with proper oil filter changes ...

Can and does extend the "Normal" Amsoil 1 year/25,000 mile service life to be that of
100,000 miles and beyond >>> on a 1 time fill.

All on a 1 time crankcase fill.
********************************.
And the internals of your engine will
stay clean, and will become cleaner ... if there is in-fact much plaque buildup in the engine now.

And the wear and burned carbon buildup that otherwize is squeeged into the piston oil control rings > does not happen.

The rings stay clean and free of buildup.
The bearings stay as tight as new.

We had one such engine with 280,000 miles disassembled for a problem and was reassembled with the same main and rod bearings ... with NO need to change them to new parts.

Piston rings only ... where the petroleum had plaqued up the oil control and secondary piston rings ... before it was changed to Amsoil.

There are NO deposits in Amsoil products to become solidified with the heat decaying and fuel burning process like there is with petroleum/coal/dinosaur parts oils.

If your Amsoil product is clean, non acidic, and has not been severely heat stressed for years of service ...
Amsoil is practically indestructible.

And makes every powerplant that it goes into ...
much the same way.

How else could they offer an 8,000 hour air compressor lubricant ... instead of the 50 to 100 hour product that petroleum lubricants are?
quote:
I'm wrong maybe but same filtration media (nanofiber) as in EaA, EaBP & EaAU indicate it.



Amsoil states that there are many different mfg's of the filters/components. They went to every source they could find for the best components and then made agreements with several mfg's tp produce them. Those agreements are such that Amsoil will not disclose who makes them but comparing brands show that you can make an assumption that some are made by Wix, some by Donaldson and some by others. All depends on the model of filter and who had the best tooling and agreed to mfg them useing Amsoil supplied components. Because this venture involves just about all the major filter mfg's they have agreed not to disclose who is building them. Wix and Donaldson are one of the major partners. The technology for the media comes from Donaldson but was adapated for auto use as most of Donaldson's nano-fiber filters are for the HD truck market. They are not interested in the auto markert and thats were Amsoil comes in.

This I heard at the seminars. You had to read between the lines and listen carefully to the answers to questions as they would not tell who made what model, only saying that the best are doing what they do best. There have been workers for Wix that have stated that they make some of them.

Rest asssured that they are made with the best possible components by top notch mfg's. They wanted to have the best product regardless of cost.
quote:
Originally posted by MikeR:
I use the 5W-30 Amsoil (ASL) in my 2005 Cadillac CTS. I am changing it once a year and expect to put 10,000 miles on it it this year. Last year I only managed to go 7,100 as I drove the truck a lot.

I have been doing yearly oil changes with Amsoil since 1975 and been a dealer since 1978.

But depending on the type of oil you previously used in the car, I would keep an eye on it. Synthetic will clean the inside of the engine like no other and if you start to use oil it could be a sign the oil additives are getting used up. This may mean you need to replace the oil filter sooner or maybe even a change. Once it cleans out any deposits that may be in there, it should stabilize. Sometimes after using fossil oil (some are worse than others) this will occur but not always so don't be alarmed, Just be aware of that.

Personall I think 10,000 miles is a no brainer with that oil and an EaO filter. They don't make an EaO or EaA fitlers for my CTS and say they likely never will, uses a cartridge oil and a custom panel air but I use them in the other vehicles.

I am using Amsoil in my
2005 CTS
2004 GMC 4x4
1993 Limina (ams XL5W-30 since new)
1992 Chevy 4x4 winter snow plow use
+ in my 2006 Rincon (ATV) and all my small engines like lawnmower, pressure washer, snowblower and leave eater upper.

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