Amsoil Question???

[casperfun]

I know this is not licensed as such, but would Amsoil 5w-30 exceed the ILSAC GF-5 specification if they wanted to licensed it as such? I understand the licensing of the GF-5 standard started this month of Oct. 2010.

Which leads me to another question. Would a Group III base stock oil with a GF-5 specification be better than a Group IV base stock oil with only a GF-4 specification for a 2009 16-valve, 2.5-liter QR25DE engine or any engine for that matter?

I'm planning long OCI's

Thanks in advance.

 

[BeanCounter]

Amsoil's XL line (least recommended OCI of their oils) has just been reformulated and it specifically references use for oils that need to meet GF-5, if that puts perspective on your question.

 

[Steve S]

I do not think you would ever notice a difference between the ratings if Amsoil is used. Back in the middle 90s I met a guy with almost 500,000 miles on a Nissan 4 cyl p/u running Amsoil oil for 25,000 miles and changing the Amsoil oil filter at 12,500 miles and using an Amsoil foam air filter . I do not use Amsoil but I have met many Amsoil users that have had great results with extended oil change intervals. I do not put the miles on my vehicles to benefit from Amsoils extended oil change intervals

 

[crazyoildude]

Being in the engine business and dealing with a lot of courier drivers and construction trucks (mostly fords)i see a lot of 4.6 v8 ford engines with 400,000 500,000 and more in some cases coming in for rebuilds (these guys run these things a lot longer than the taxi and limo guys and most run on dino..Some engines run forever like the "old" toyota's and nissan's the new ones are another story.

 

[blue94]

If price is no object, I'd run one of the GF-4 PAO based Amsoils (ASL or SSO) over any common GF-5 group III anything. In my experience, those oils behave differently that any other oils I've tried (though I certainly haven't tried everything). I've run them in several cars and they stand up exceptionally well over time and mileage, clean sludge, varnish, you name it. But, it comes at a cost and sometimes it's worth it, sometimes not. And, sometimes, Amsoil does "too good" a job and exposes tired old gaskets that you'd rather have gummed up with dino and lesser syns...

 

[casperfun]

I just want to mention price was no object (of course I paid a premium price/impulse buy) and availability was easy since I found Amsoil at my local hardware store unexpectedly last July. I was researching oils before the 2 free dealership changes completed and preparing ahead of time for DIY oil change. My actual first choice was Pennzoil Ultra which I chose over Castrol Edge.

Now I am in the process of cleaning my engine with the Ultra on my 2009 engine after 2 OCI's with Vavoline Durablend 5W-30.

I just want to make sure that using my Amsoil stash is more BENEFICIAL than just continuing the Pennzoil Ultra treatment.

Using a long OCI with a bosch distance plus filter.

Thanks for the good answers so far.

 

[BeanCounter]

Yep, you should have 0 problems going forward with using your Amsoil stash.