Amsoil ASL 5w30, 8k miles, 03 Chevy 1500HD

[TXHunter]

First fill with Amsoil ASL Signature 5w30 oil and filter, previous fills have always been Valvoline Maxlife (5w or 10w30). Oil was not drained at the time of sample. Engine on this and the 05 Tahoe are both north of 100k, I'm waiting to hear back on the exact numbers.

 

[HTSS_TR]

Similar result as with your 06 Tahoe, check your air intake system along with air filter. Do you use K&N air filter in either one ?

 

[TXHunter]

Yes, K&N air filters are in both.

 

[HTSS_TR]

Read this air filter study, you will not like how K&N filter performance compares with others. Even the lowly STP air filter is much better than K&N.

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2577430#Post2577430

 

[barlowc]

Originally Posted By: HTSS_TR
Read this air filter study, you will not like how K&N filter performance compares with others. Even the lowly STP air filter is much better than K&N.

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2577430#Post2577430

Blaming the K&N for the high(er) silicon is a guess and nothing more. It could be the K&N, and I'm not making any claims that K&N filters are superior. However, I've had just fine silicon levels in multiple UOAs and in multiple vehicles. (Average 12.5 in my Nissan and average 15.5 in the Saturn.) Like I said, it COULD be the K&N if but don't conclude that without further investigation.

 

[Topo]

Originally Posted By: HTSS_TR
Read this air filter study, you will not like how K&N filter performance compares with others. Even the lowly STP air filter is much better than K&N.

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2577430#Post2577430


I had a K@N air filter in for almost 11,000 miles i had a reading of 20 ppm and I don't run on dusty roads.

 

[cchase]

Just remember that Si readings aren't the end-all for how much dirt is being ingested by an engine.

 

[TXHunter]

Interesting piece of information I found out from Blackstone, apparently Amsoil is using a silicon additive in the Signature series which is contributing to that number. I'm still planning to test my 04 Tahoe with the paper Wix filter to see how the numbers compare against the previous samples with the K&N filter.

Snippet from the Blackstone response.
Amsoil uses silicon as a harmless anti-foam additive while mixing their oils. It's completely harmless. That does not mean that some of the silicon is also abrasive dirt making it in through engine air filtration though

 

[Loobed]

Originally Posted By: barlowc
Originally Posted By: HTSS_TR
Read this air filter study, you will not like how K&N filter performance compares with others. Even the lowly STP air filter is much better than K&N.

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2577430#Post2577430

Blaming the K&N for the high(er) silicon is a guess and nothing more. It could be the K&N, and I'm not making any claims that K&N filters are superior. However, I've had just fine silicon levels in multiple UOAs and in multiple vehicles. (Average 12.5 in my Nissan and average 15.5 in the Saturn.) Like I said, it COULD be the K&N if but don't conclude that without further investigation.


+1

The newer (2000+) GM trucks seem to always show high silicon and copper. I have tried to find the source for silicone entry, but couldn't. I had the same silicone numbers whether I had the K&N, Fram TG, or Purolator air filter. I have added Hylomar sealant to every joint in the air intake, and still the silicone is high.

 

[ridgerunner]

Most Amsoil UOA's I've seen read high in si. All mine read high too. Check a bunch out for yourself. Can't all be from the air filter.

 

[Pablo]

Originally Posted By: dhellman12
Interesting piece of information I found out from Blackstone, apparently Amsoil is using a silicon additive in the Signature series which is contributing to that number. I'm still planning to test my 04 Tahoe with the paper Wix filter to see how the numbers compare against the previous samples with the K&N filter.

Snippet from the Blackstone response.
Amsoil uses silicon as a harmless anti-foam additive while mixing their oils. It's completely harmless. That does not mean that some of the silicon is also abrasive dirt making it in through engine air filtration though


There must be some confusion. Amsoil has some Si, maybe 8-12 ppm. Not over 20 ppm.

 

[ltslimjim]

Well, I'll be seeing how Si readings are in my current OCI and comparing it to a new AFE Pro Dry S I've got on the way. I wasn't pleased with Si numbers with the K&N, but it could be other things like some engine work causing mild spikes. Wear wasn't an issue for me(as far as ppm seen), but we're BITOG. Worth looking for changed variables and trying to read into them or learn something. It is good not to jump to conclusions but simply gather the facts.

K&N use in the OP's app here is definitely not a bad point to refer to as a potential reason for Si entry, let's be real. Try another run, see what happens to Si. Then, throw in a paper filter of decent quality with the same type of oil/filter combo and compare Si trends.