Amsoil Oil Filters-they are definately not the same

[Sierra Tango II]

I decided this year while winterizing that I would switch over to Amsoil. I have friends that have been using it for years and swear by it. I did my research and quite honestly I have found that they're are people that use it exclusively and love it and others that seem to feel that its just as good as other synthetics such as Valvoline VR1......no bad reviews however, which is unusual. My question is that I bought the oil filter as well and when I received it it was 2/3 the size, both in diameter and depth. My boat is a 98 30th anniversary edition with the 350 horse Corvette LT1. I ordered the filter that Amsoil specified for the car. Is the boat motor different than the car in the oil filter size respect? I was using the Napa Platinum 41060. Maybe Im misguided in my thinking as well, but the size of the amsoil filter is the size of the filter that my lady is running in her scion, I cant imagine a Corvette running a filter that small. Thanks in advance for any light that you can shine on this subject-Eric

[mikeg205]

I decided this year while winterizing that I would switch over to Amsoil. I have friends that have been using it for years and swear by it. I did my research and quite honestly I have found that they're are people that use it exclusively and love it and others that seem to feel that its just as good as other synthetics such as Valvoline VR1......no bad reviews however, which is unusual. My question is that I bought the oil filter as well and when I received it it was 2/3 the size, both in diameter and depth. My boat is a 98 30th anniversary edition with the 350 horse Corvette LT1. I ordered the filter that Amsoil specified for the car. Is the boat motor different than the car in the oil filter size respect? I was using the Napa Platinum 41060. Maybe Im misguided in my thinking as well, but the size of the amsoil filter is the size of the filter that my lady is running in her scion, I cant imagine a Corvette running a filter that small. Thanks in advance for any light that you can shine on this subject-Eric

Engine is same - however, marine engines usually run higher RPM's. I would not use a small filter.. I used to run Napa Gold 1069 - but decided to change to Napa Platinum 41060 - just to feed my MCOCD. It's all about filter surface area and flow.

Besides the Indmar manual calls out anything that x-refs the Napa 1069 - I just can't bring myself to call out the orange filter's name...

[Traxx822]

The oil filter for a 2000 Corvette is the same as a 2000 S10 or Cavalier. They are small.

For Oil in my boat I use Mercury Synthetic. And the Napa filter. Now for my snowmobiles. AmsOil is the only thing I will EVER run.

[zamboniman]

Real estate is tight under the hood of a vet.. it's very likely to run a small filter. Also on tight yet high performance applications like that it's not uncommon to punt an oil cooler and end up with higher operating temperatures.. which is what contributes to a factory requirement of running synthetic...

Or something like that anyway. so I was told a long time ago by a someone that was working with this stuff. Foggy memory a long time ago conversation over a drink. Take it with a grain of salt but seems reasonable.

[Table Rocker]

In regards to our LT-1 engines, I think we are better off referring to them as '96 Z-28s when we are looking for parts. If you ask for engine parts for a '98 Corvette (since your boat is a '98 and the engine says "Corvette", you will be getting parts for an LS1 engine. '97 Z-28s and TransAms were the last GM applications of our LT-1 engines. From what I can tell, the Corvette LT-1s always had different oil filters than our Indmars need. The filters were smaller in diameter as well as shorter.

[Rossterman]

Small block Chevys depending on model use the long or short version. Most trucks used the long (except some with 4wd). Had to do with clearance. I always run the long version as more filter area. Heck, there used to be one that was used with the engine in commercial applications that was twice the length! Haven't seen one of those in years though so probably discontinued.

[Sierra Tango II]

In regards to our LT-1 engines, I think we are better off referring to them as '96 Z-28s when we are looking for parts. If you ask for engine parts for a '98 Corvette (since your boat is a '98 and the engine says "Corvette", you will be getting parts for an LS1 engine. '97 Z-28s and TransAms were the last GM applications of our LT-1 engines. From what I can tell, the Corvette LT-1s always had different oil filters than our Indmars need. The filters were smaller in diameter as well as shorter.

That makes sense, so in essence I need to put a filter on for a 1997 LT1. That makes sense. The filter is quite a bit smaller in diameter as well, so I cannot see it fitting the boat. The boat is in storage now but am going over tomorrow to look up the numbers cast on the block. your explanation totally makes sense to me. Thank you

[epnault]

From oil to filters I believe you should always follow the OE recommmendations. Aftermarket oil companies spend the majority of their time and money on marketing, not engineering. When you have to put your brand and warranty dollars behind the product, OE don't take these recommendations lightly.

[flya750]

Not sure about the filters.. but the oil has no equal... When I switched to amsoil in my 20+ year old motorcycles.. each motorcycle had an extremely noticeable difference in smoothness and cold weather starts....The boat seemed to like the oil change too.

I use to run full Valvoline synthetic.... when I switched to amsoil.. it was night and day difference. Case closed as far as I'm concerned..

[Table Rocker]

Heck, there used to be one that was used with the engine in commercial applications that was twice the length! Haven't seen one of those in years though so probably discontinued.

WIX still makes it. 51794

That makes sense, so in essence I need to put a filter on for a 1997 LT1. That makes sense. The filter is quite a bit smaller in diameter as well, so I cannot see it fitting the boat. The boat is in storage now but am going over tomorrow to look up the numbers cast on the block. your explanation totally makes sense to me. Thank you

Yes, and when looking for a 97 LT-1 you would use the Z28 or Trans Am for reference. Our LT-1s use a filter with an outside diameter of 3.66 inches and has 13/16-16 threads which is the same as the Z/28-TA. If you use a '93 Corvette LT-1 for lookup, you get an oil filter with an outside diameter of 2.921 and 18X1.5 MM metric threads.

http://wixfilters.com/Lookup/filterlookup.aspx

[1redTA]

The mobile 1 M1 111 is the normal filter the long filter is the M1 302 or napa gold 1060

I think you'll be fine with the AmsOil filter

[1redTA]

Amsoil recommends the following for the 5.7 lt-1 from 96
FILTERS:
Oil Filter 25,000-Mile Ea Oil Filter (EAO59)
Oil Filter WIX 51069 Oil Filter

[bsloop]

OK, so the OP's mistake was thinking an automotive engine's oil mount would be same as a marine engine of the same year.
Second was giving up on a single cross reference search and trusting Amsoil, a non-manufacturer. Napa 41060 does not come up valid with amsoil but Wix 51060 (same filter) does - Amsoil eao24

Amsoil is made by Donaldson - eao24 cross references to p166564 both have the same 20micron at 99% efficiency
P550964 is the standard Donaldson filter at 35micron at 99%. xref Wix 51060
p550025 xref wix 51069 is the one inch shorter alternative.
p550832 xref wix 51794 is 8" long with 20micron @ 50% efficiency

btw, many studies indicate beyond large pieces, the next most damaging size to HIGH hour engine life is 4-9 micron, which none of these filters touch more than a small percentage. It is almost impossible at the flow and viscosity of engine oil which is why you see bypass oil filtration on ultra high hour motors that are expensive like OTR diesels. Otherwise the ROI and odds are working against the larger expense.


Amsoil's xref online is conflicted (wrong likely) regarding 1redTA's info, I would not trust eao59 to fit properly.
Amsoil website xref wix 51069 to eao59 which have significantly different sizes. Amsoil eao59 xref shows wix 57099.
Donaldson xref both Eao59 and 57099 xref to p550507 which all have similar dimensions but are different than the size we need.
You can see the actual measurements in Donaldson's catalog. page 80 - http://www.donaldson.com/en/engine/s...ary/070044.pdf

IMO, frankly one should not stress over a recreational marine engine. They operate in a relatively clean environment and the engine rarely runs enough hours to pickup significant contamination that a filter would control.
Choose a mid quality filter that is made well enough to have a reduced incidence of failure. Beyond that a person is spending money that will have a negative ROI other than the psychiatrist bill for their OCD.

[bigmac]

I decided this year while winterizing that I would switch over to Amsoil. I have friends that have been using it for years and swear by it.

Yeah. Not uncommon. Why do your friends like it so much? Is it because since using it they've never had an oil-related catastrophic engine failure, or is it because of the way it makes them feel to be a member of the "cult of Amsoil"?

Any actual objective data that they can bring to the table to shed light on exactly why they swear by it?

[bsloop]

Awww, come on, don't we have enough Amsoil specific and Syn vs dino debate threads already?

But I know its winter so watch this "thread" grow "roots".

Btw, if this was an inverted mount like some Mercruiser, the anti drain back valve might be an issue but not on upward mounts.